206-09 Anti-Lock Brake System (ABS) and Stability Control 2013 - 2014 Fusion
Diagnosis and Testing Procedure revision date: 03/6/2013

Anti-Lock Brake System (ABS) and Stability Control - Vehicles Built Up To: 03-June-2013

DTC Chart: Anti-Lock Brake System (ABS) Module

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices.
REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).



  ABS Module DTC Chart


DTC Description Action
B10DF:46 Master Cylinder Isolation Valve: Calibration / Parameter Memory Failure
  • This DTC sets due to an internal failure of the ABS module or a calibration failure between the HCU and the ABS module.
  • Using a diagnostic scan tool, CARRY OUT the Inlet Valve Calibration and then the Master Cylinder Isolation Calibration.
  • CLEAR the DTC and REPEAT the self-test. If the DTC returns, REPEAT the 2 calibration routines making sure to FOLLOW the diagnostic scan tool directions.
  • CLEAR the DTC and REPEAT the self-test. If the DTC returns, INSTALL a new ABS module and HCU assembly.
    REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
B1111:44 Electric Park Brake Enable: Data Memory Failure  
REFER to: Parking Brake (206-05 Parking Brake and Actuation, Diagnosis and Testing).
B1111:46 Electric Park Brake Enable: Calibration / Parameter Memory Failure  
REFER to: Parking Brake (206-05 Parking Brake and Actuation, Diagnosis and Testing).
B1111:49 Electric Park Brake Enable: Internal Electronic Failure  
REFER to: Parking Brake (206-05 Parking Brake and Actuation, Diagnosis and Testing).
B1111:4B Electric Park Brake Enable: Over Temperature  
REFER to: Parking Brake (206-05 Parking Brake and Actuation, Diagnosis and Testing).
B1111:53 Electric Park Brake Enable: Deactivated  
REFER to: Parking Brake (206-05 Parking Brake and Actuation, Diagnosis and Testing).
B1111:54 Electric Park Brake Enable: Missing Calibration  
REFER to: Parking Brake (206-05 Parking Brake and Actuation, Diagnosis and Testing).
C0001:01 TCS Control Channel "A" Valve 1: General Electrical Failure
  • This DTC indicates part of the ABS module has failed internally. CLEAR the DTC . REPEAT the self-test.
  • If the DTC returns, INSTALL a new ABS module and HCU assembly.
    REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
C0002:01 TCS Control Channel "A" Valve 2: General Electrical Failure
  • This DTC indicates part of the ABS module has failed internally. CLEAR the DTC . REPEAT the self-test.
  • If the DTC returns, INSTALL a new ABS module and HCU assembly.
    REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
C0003:01 TCS Control Channel "B" Valve 1: General Electrical Failure
  • This DTC indicates part of the ABS module has failed internally. CLEAR the DTC . REPEAT the self-test.
  • If the DTC returns, INSTALL a new ABS module and HCU assembly.
    REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
C0004:01 TCS Control Channel "B" Valve 2: General Electrical Failure
  • This DTC indicates part of the ABS module has failed internally. CLEAR the DTC . REPEAT the self-test.
  • If the DTC returns, INSTALL a new ABS module and HCU assembly.
    REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
C0010:01 Left Front Inlet Control: General Electrical Failure
  • This DTC indicates part of the ABS module has failed internally. CLEAR the DTC . REPEAT the self-test.
  • If the DTC returns, INSTALL a new ABS module and HCU assembly.
    REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
C0011:01 Left Front Outlet Control: General Electrical Failure
  • This DTC indicates part of the ABS module has failed internally. CLEAR the DTC . REPEAT the self-test.
  • If the DTC returns, INSTALL a new ABS module and HCU assembly.
    REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
C0014:01 Right Front Inlet Control: General Electrical Failure
  • This DTC indicates part of the ABS module has failed internally. CLEAR the DTC . REPEAT the self-test.
  • If the DTC returns, INSTALL a new ABS module and HCU assembly.
    REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
C0015:01 Right Front Outlet Control: General Electrical Failure
  • This DTC indicates part of the ABS module has failed internally. CLEAR the DTC . REPEAT the self-test.
  • If the DTC returns, INSTALL a new ABS module and HCU assembly.
    REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
C0018:01 Left Rear Inlet Control: General Electrical Failure
  • This DTC indicates part of the ABS module has failed internally. CLEAR the DTC . REPEAT the self-test.
  • If the DTC returns, INSTALL a new ABS module and HCU assembly.
    REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
C0019:01 Left Rear Outlet Control: General Electrical Failure
  • This DTC indicates part of the ABS module has failed internally. CLEAR the DTC . REPEAT the self-test.
  • If the DTC returns, INSTALL a new ABS module and HCU assembly.
    REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
C001C:01 Right Rear Inlet Control: General Electrical Failure
  • This DTC indicates part of the ABS module has failed internally. CLEAR the DTC . REPEAT the self-test.
  • If the DTC returns, INSTALL a new ABS module and HCU assembly.
    REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
C001D:01 Right Rear Outlet Control: General Electrical Failure
  • This DTC indicates part of the ABS module has failed internally. CLEAR the DTC . REPEAT the self-test.
  • If the DTC returns, INSTALL a new ABS module and HCU assembly.
    REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
C0020:11 ABS Pump Motor Control: Circuit Short To Ground
  • This DTC indicates part of the ABS module has failed internally.
  • CLEAR the DTC . REPEAT the ABS module self-test.
  • If the DTC returns, INSTALL a new ABS module and HCU assembly.
    REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
C0020:12 ABS Pump Motor Control: Circuit Short To Battery
  • This DTC indicates part of the ABS module has failed internally.
  • CLEAR the DTC . REPEAT the ABS module self-test.
  • If the DTC returns, INSTALL a new ABS module and HCU assembly.
    REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
C0020:13 ABS Pump Motor Control: Circuit Open   GO to Pinpoint Test H
C0020:71 ABS Pump Motor Control: Actuator Stuck   GO to Pinpoint Test H
C0030:07 Left Front Tone Wheel: Mechanical Failure   GO to Pinpoint Test B
C0031:07 Left Front Wheel Speed Sensor: Mechanical Failure   GO to Pinpoint Test B
C0031:11 Left Front Wheel Speed Sensor: Circuit Short to Ground   GO to Pinpoint Test K
C0031:15 Left Front Wheel Speed Sensor: Circuit Short to Battery or Open   GO to Pinpoint Test K
C0031:29 Left Front Wheel Speed Sensor: Signal Invalid   GO to Pinpoint Test B
C0031:2F Left Front Wheel Speed Sensor: Signal Erratic   GO to Pinpoint Test B
C0031:4A Left Front Wheel Speed Sensor: Incorrect Component Installed
C0031:64 Left Front Wheel Speed Sensor: Signal Plausibility Failure   GO to Pinpoint Test B
C0033:07 Right Front Tone Wheel: Mechanical Failure   GO to Pinpoint Test B
C0034:07 Right Front Wheel Speed Sensor: Mechanical Failure   GO to Pinpoint Test B
C0034:11 Right Front Wheel Speed Sensor: Circuit Short to Ground   GO to Pinpoint Test K
C0034:15 Right Front Wheel Speed Sensor: Circuit Short to Battery or Open   GO to Pinpoint Test K
C0034:29 Right Front Wheel Speed Sensor: Signal Invalid   GO to Pinpoint Test B
C0034:2F Right Front Wheel Speed Sensor: Signal Erratic   GO to Pinpoint Test B
C0034:4A Right Front Wheel Speed Sensor: Incorrect Component Installed
C0034:64 Right Front Wheel Speed Sensor: Signal Plausibility Failure   GO to Pinpoint Test B
C0036:07 Left Rear Tone Wheel: Mechanical Failure   GO to Pinpoint Test B
C0037:07 Left Rear Wheel Speed Sensor: Mechanical Failure   GO to Pinpoint Test B
C0037:11 Left Rear Wheel Speed Sensor: Circuit Short to Ground   GO to Pinpoint Test L
C0037:15 Left Rear Wheel Speed Sensor: Circuit Short to Battery or Open   GO to Pinpoint Test L
C0037:29 Left Rear Wheel Speed Sensor: Signal Invalid   GO to Pinpoint Test B
C0037:2F Left Rear Wheel Speed Sensor: Signal Erratic   GO to Pinpoint Test B
C0037:4A Left Rear Wheel Speed Sensor: Incorrect Component Installed
C0037:64 Left Rear Wheel Speed Sensor: Signal Plausibility Failure   GO to Pinpoint Test B
C0039:07 Right Rear Tone Wheel: Mechanical Failure   GO to Pinpoint Test B
C003A:07 Right Rear Wheel Speed Sensor: Mechanical Failure   GO to Pinpoint Test B
C003A:11 Right Rear Wheel Speed Sensor: Circuit Short to Ground   GO to Pinpoint Test L
C003A:15 Right Rear Wheel Speed Sensor: Circuit Short to Battery or Open   GO to Pinpoint Test L
C003A:29 Right Rear Wheel Speed Sensor: Signal Invalid   GO to Pinpoint Test B
C003A:2F Right Rear Wheel Speed Sensor: Signal Erratic   GO to Pinpoint Test B
C003A:4A Right Rear Wheel Speed Sensor: Incorrect Component Installed
C003A:64 Right Rear Wheel Speed Sensor: Signal Plausibility Failure   GO to Pinpoint Test B
C0040:64 Brake Pedal Switch "A": Signal Plausibility Failure   GO to Pinpoint Test C
C0044:28 Brake Pressure Sensor "A": Signal Bias Level Out of Range / Zero Adjustment Failure   GO to Pinpoint Test C
C0044:47 Brake Pressure Sensor "A": Watchdog / Safety Failure
  • DIAGNOSE DTC C0040:64 before diagnosing this DTC .
  • If DTC C0040:64 is not present, CLEAR the DTC . CYCLE the ignition from ON to OFF and back to ON. REPEAT the self-test. If DTC C0044:47 returns, VERIFY all ABS module-to- HCU fasteners are tightened to 5 Nm (44 lb-in).
  • If all fasteners are tightened to their correct torque specifications, INSTALL a new ABS module and HCU assembly.
    REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
C0044:49 Brake Pressure Sensor "A": Internal Electronic Failure
  • DIAGNOSE DTC C0040:64 before diagnosing this DTC .
  • If DTC C0040:64 is not present, CLEAR the DTC . CYCLE the ignition from ON to OFF and back to ON. REPEAT the self-test. If DTC C0044:49 returns, VERIFY all ABS module-to- HCU fasteners are tightened to 5 Nm (44 lb-in).
  • If all fasteners are tightened to their correct torque specifications, INSTALL a new ABS module and HCU assembly.
    REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
C0044:51 Brake Pressure Sensor "A": Not Programmed
  • DIAGNOSE DTC C0040:64 before diagnosing this DTC .
  • If DTC C0040:64 is not present, CLEAR the DTC . CYCLE the ignition from ON to OFF and back to ON. REPEAT the self-test. If DTC C0044:51 returns, VERIFY all ABS module-to- HCU fasteners are tightened to 5 Nm (44 lb-in).
  • If all fasteners are tightened to their correct torque specifications, INSTALL a new ABS module and HCU assembly.
    REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
C0044:64 Brake Pressure Sensor "A": Signal Plausibility Failure
  • DIAGNOSE DTC C0040:64 before diagnosing this DTC .
  • If DTC C0040:64 is not present, CLEAR the DTC . CYCLE the ignition from ON to OFF and back to ON. REPEAT the self-test. If DTC C0044:64 returns, VERIFY all ABS module-to- HCU fasteners are tightened to 5 Nm (44 lb-in).
  • If all fasteners are tightened to their correct torque specifications, INSPECT the brake tubes and connections for damage and leaks. REPAIR or INSTALL new brake tubes as necessary.
  • If brake tubes and connections are OK and there are no brake fluid leaks, BLEED the brake system.
    REFER to: Brake System Bleeding (206-00 Brake System - General Information, General Procedures).
  • CYCLE the ignition from ON to OFF and back to ON. CARRY OUT the ABS module self-test. If this DTC returns, INSTALL a new ABS module and HCU assembly.
    REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
C0044:8F Brake Pressure Sensor "A": Erratic
  • DIAGNOSE DTC C0040:64 before diagnosing this DTC .
  • If DTC C0040:64 is not present, CLEAR the DTC . CYCLE the ignition from ON to OFF and back to ON. REPEAT the self-test. If DTC C0044:8F returns, VERIFY all ABS module-to- HCU fasteners are tightened to 5 Nm (44 lb-in).
  • If all fasteners are tightened to their correct torque specifications, INSTALL a new ABS module and HCU assembly.
    REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
C0047:01 Brake Booster Pressure Sensor: General Electric Failure   GO to Pinpoint Test M
C0047:1B Brake Booster Pressure Sensor: Circuit Resistance Above Threshold   GO to Pinpoint Test M
C0047:26 Brake Booster Pressure Sensor: Signal Rate of Change Below Threshold   GO to Pinpoint Test M
C0047:27 Brake Booster Pressure Sensor: Signal Rate of Change Above Threshold   GO to Pinpoint Test M
C0047:62 Brake Booster Pressure Sensor: Signal Compare Failure   GO to Pinpoint Test M
C0051:28 Steering Wheel Position Sensor: Signal Bias Level Out of Range / Zero Adjustment Failure   GO to Pinpoint Test J
C0051:62 Steering Wheel Position Sensor: Signal Compare Failure   GO to Pinpoint Test J
C0051:64 Steering Wheel Position Sensor: Signal Plausibility Failure   GO to Pinpoint Test J
C0051:67 Steering Wheel Position Sensor: Signal Incorrect After Event   GO to Pinpoint Test J
C0051:85 Steering Wheel Position Sensor: Signal Above Allowable Range   GO to Pinpoint Test J
C0061:28 Lateral Acceleration Sensor: Signal Bias Level Out of Range / Zero Adjustment Failure   GO to Pinpoint Test G
C0061:2F Lateral Acceleration Sensor: Signal Erratic   GO to Pinpoint Test G
C0061:64 Lateral Acceleration Sensor: Signal Plausibility Failure   GO to Pinpoint Test G
C0062:28 Longitudinal Acceleration Sensor: Signal Bias Level Out of Range / Zero Adjustment Failure   GO to Pinpoint Test G
C0062:54 Longitudinal Acceleration Sensor: Missing Calibration
  • This DTC sets if the stability sensors in the RCM have not been calibrated or the calibration has been lost. CARRY OUT the IVD Initialization routine, FOLLOW the diagnostic scan tool instructions.
  • If the module fails the initialization routine, VERIFY the RCM is installed correctly and the fasteners are tightened to specifications. REINSTALL the RCM or INSTALL a new RCM as necessary.
    REFER to: Restraints Control Module (RCM) (501-20B Supplemental Restraint System, Removal and Installation).
    If the RCM is OK, CARRY OUT the RCM self-test. RETRIEVE and RECORD any Diagnostic Trouble Codes (DTCs).
    REFER to: Airbag Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, Diagnosis and Testing).
  • If the module passes the calibration routine, CLEAR the DTC . CYCLE the ignition from ON to OFF and back to ON. CARRY OUT the ABS module self-test. If the DTC returns, INSTALL a new ABS module and HCU assembly.
    REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
C0062:64 Longitudinal Acceleration Sensor: Signal Plausibility Failure   GO to Pinpoint Test G
C0062:76 Longitudinal Acceleration Sensor: Wrong Mounting Position
  • Due to the nature of the longitudinal acceleration sensor, the RCM must be installed in the correct orientation to the centerline of the vehicle. This DTC sets if the RCM has been installed in the wrong position.
  • VERIFY the RCM is installed correctly and the fasteners are tightened to specifications. REINSTALL the RCM or INSTALL a new RCM as necessary.
    REFER to: Restraints Control Module (RCM) (501-20B Supplemental Restraint System, Removal and Installation).
  • If the RCM is OK, CARRY OUT the RCM self-test. RETRIEVE and RECORD any Diagnostic Trouble Codes (DTCs).
    REFER to: Airbag Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, Diagnosis and Testing).
C0063:28 Yaw Rate Sensor: Signal Bias Level Out of Range / Zero Adjustment Failure   GO to Pinpoint Test G
C0063:2F Yaw Rate Sensor: Signal Erratic   GO to Pinpoint Test G
C0063:64 Yaw Rate Sensor: Signal Plausibility Failure   GO to Pinpoint Test G
C0064:28 Roll Rate Sensor: Signal Bias Level Out of Range / Zero Adjustment Failure   GO to Pinpoint Test G
C0064:64 Roll Rate Sensor: Signal Plausibility Failure   GO to Pinpoint Test G
C006B:00 Stability System Active Too Long: No Sub Type Information
  • DIAGNOSE all other ABS module Diagnostic Trouble Codes (DTCs) before diagnosing DTC C006B:00
  • If no other ABS module Diagnostic Trouble Codes (DTCs) are present, GO to Pinpoint Test O
C0072:68 Brake Temperature Too High: Event Information
  • This DTC indicates the CCM has made a deceleration request is outside of normal operating parameters. The allowable deceleration is dependent on actual vehicle speed. With vehicle speed between 0 km/h (0 mph) and 60 km/h (37 mph), allowable deceleration is 3.92 meters per second 2 . With vehicle speed above 60 km/h (37 mph), allowable deceleration is 3.12 meters per second 2 . Decelerating too quickly causes the brakes to overheat resulting in a brake fade condition.
  • This DTC does not indicate a concern with the ABS or stability control system. Do not install any new ABS or stability control components if this is DTC present.
  • This DTC is most likely caused by a failure in the cruise control system or a network communication concern. RETRIEVE and DIAGNOSE all CAN Diagnostic Trouble Codes (DTCs). If there are no CAN Diagnostic Trouble Codes (DTCs) present, RETRIEVE and DIAGNOSE any CCM Diagnostic Trouble Codes (DTCs).
    REFER to: Cruise Control (419-03A Cruise Control, Diagnosis and Testing).
C1015:7A Vacuum Supply: Fluid Leak or Seal Failure   GO to Pinpoint Test R
C1015:7B Vacuum Supply: Low Fluid Level   GO to Pinpoint Test R
C1020:00 Brake System Fill Not Complete: No Sub-Type Information
  • This DTC is pre-set in a new ABS module and HCU assembly and can only be cleared when the Brake System Service Bleed is successfully carried out.
  • CARRY OUT the Brake System Service Bleed.
    REFER to: Brake System Bleeding (206-00 Brake System - General Information, General Procedures).
C1034:71 Parking Brake: Actuator Stuck  
REFER to: Parking Brake (206-05 Parking Brake and Actuation, Diagnosis and Testing).
C1137:29 Reverse Gear Switch: Signal Invalid
  • This DTC sets when the ABS module receives an "invalid" message from the TCM instead of the actual current transmission gear.
  • RETRIEVE and REPAIR all non-network Diagnostic Trouble Codes (DTCs) in the TCM .
C1137:64 Reverse Gear Switch: Signal Plausibility Failure
  • This DTC sets when the reverse gear message sent from the TCM indicates the transmission is in REVERSE when other stability control inputs received by the ABS module indicate the vehicle is moving forward.
  • RETRIEVE and REPAIR all non-network Diagnostic Trouble Codes (DTCs) in the TCM .
C1A08:1C Pressure Sensor Supply: Circuit Voltage Out of Range
  • The brake system pressure sensor is supplied voltage by the ABS module. The ABS module monitors this output and sets this DTC when the voltage is out of range.
  • DIAGNOSE DTC U3003:16 or U3003:17, before diagnosing C1A08:1C.
  • If DTC U3003:16 or U3003:17 is not present, make sure all ABS module-to- HCU fasteners are tightened to their correct torque specifications.
  • If all fasteners are tightened to their correct torque specifications, INSTALL a new ABS module and HCU assembly.
    REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
C1A43:91 Motor Supply: Parametric  
REFER to: Parking Brake (206-05 Parking Brake and Actuation, Diagnosis and Testing).
C1A43:98 Motor Supply: Component or System Over Temperature  
REFER to: Parking Brake (206-05 Parking Brake and Actuation, Diagnosis and Testing).
C1B14:11 Sensor Supply Voltage "A": Circuit Short to Ground
  • The brake system pressure sensor is supplied voltage by the ABS module. The ABS module monitors this output and sets this DTC when a short to ground is detected.
  • DIAGNOSE DTC U3003:16 or U3003:17, before diagnosing C1B14:11.
  • If DTC U3003:16 or U3003:17 is not present, make sure all ABS module-to- HCU fasteners are tightened to their correct torque specifications.
  • If all fasteners are tightened to their correct torque specifications, INSTALL a new ABS module and HCU assembly.
    REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
C1B14:12 Sensor Supply Voltage "A": Circuit Short to Battery
  • The brake system pressure sensor is supplied voltage by the ABS module. The ABS module monitors this output and sets this DTC when the voltage output is greater than 5.15 volts.
  • DIAGNOSE DTC U3003:16 or U3003:17, before diagnosing C1B14:12.
  • If DTC U3003:16 or U3003:17 is not present, make sure all ABS module-to- HCU fasteners are tightened to their correct torque specifications.
  • If all fasteners are tightened to their correct torque specifications, INSTALL a new ABS module and HCU assembly.
    REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
C1B15:1C Sensor Supply Voltage "B": Circuit Voltage Out of Range
  • The brake system pressure sensor is supplied voltage by the ABS module. The ABS module monitors this output and sets this DTC when the voltage is out of range.
  • DIAGNOSE DTC U3003:16 or U3003:17, before diagnosing C1B15:1C.
  • If DTC U3003:16 or U3003:17 is not present, make sure all ABS module-to- HCU fasteners are tightened to their correct torque specifications.
  • If all fasteners are tightened to their correct torque specifications, INSTALL a new ABS module and HCU assembly.
    REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
C2005:1B Right Actuator: Circuit Resistance Above Threshold  
REFER to: Parking Brake (206-05 Parking Brake and Actuation, Diagnosis and Testing).
C2005:71 Right Actuator: Actuator Stuck  
REFER to: Parking Brake (206-05 Parking Brake and Actuation, Diagnosis and Testing).
C2005:74 Right Actuator: Actuator Slipping  
REFER to: Parking Brake (206-05 Parking Brake and Actuation, Diagnosis and Testing).
C2005:77 Right Actuator: Commanded Position Not Reachable  
REFER to: Parking Brake (206-05 Parking Brake and Actuation, Diagnosis and Testing).
C2005:92 Right Actuator: Performance or Incorrect Operation  
REFER to: Parking Brake (206-05 Parking Brake and Actuation, Diagnosis and Testing).
C2006:1B Left Actuator: Circuit Resistance Above Threshold  
REFER to: Parking Brake (206-05 Parking Brake and Actuation, Diagnosis and Testing).
C2006:71 Left Actuator: Actuator Stuck  
REFER to: Parking Brake (206-05 Parking Brake and Actuation, Diagnosis and Testing).
C2006:74 Left Actuator: Actuator Slipping  
REFER to: Parking Brake (206-05 Parking Brake and Actuation, Diagnosis and Testing).
C2006:77 Left Actuator: Commanded Position Not Reachable  
REFER to: Parking Brake (206-05 Parking Brake and Actuation, Diagnosis and Testing).
C2006:92 Left Actuator: Performance or Incorrect Operation  
REFER to: Parking Brake (206-05 Parking Brake and Actuation, Diagnosis and Testing).
C2007:13 Right Motor: Circuit Open  
REFER to: Parking Brake (206-05 Parking Brake and Actuation, Diagnosis and Testing).
C2007:1C Right Motor: Circuit Voltage Out of Range  
REFER to: Parking Brake (206-05 Parking Brake and Actuation, Diagnosis and Testing).
C2007:92 Right Motor: Performance or Incorrect Operation  
REFER to: Parking Brake (206-05 Parking Brake and Actuation, Diagnosis and Testing).
C2007:96 Right Motor: Component Internal Failure  
REFER to: Parking Brake (206-05 Parking Brake and Actuation, Diagnosis and Testing).
C2008:13 Left Motor: Circuit Open  
REFER to: Parking Brake (206-05 Parking Brake and Actuation, Diagnosis and Testing).
C2008:1C Left Motor: Circuit Voltage Out of Range  
REFER to: Parking Brake (206-05 Parking Brake and Actuation, Diagnosis and Testing).
C2008:92 Left Motor: Performance or Incorrect Operation  
REFER to: Parking Brake (206-05 Parking Brake and Actuation, Diagnosis and Testing).
C2008:96 Left Motor: Component Internal Failure  
REFER to: Parking Brake (206-05 Parking Brake and Actuation, Diagnosis and Testing).
P0942:46 Hydraulic Pressure Unit: Calibration / Parameter Memory Failure
  • The ABS module and HCU are serviced as an assembly and should not be swapped between different vehicles. This DTC sets when the identification data stored in the ABS module does not match the identification data from the HCU .
  • Using a diagnostic scan tool, CARRY OUT the Inlet Valve Calibration routine and then the Master Cylinder Isolation Calibration routine.
  • CLEAR the DTC and REPEAT the self-test. If the DTC returns, INSTALL a new ABS module and HCU assembly.
    REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
P0942:49 Hydraulic Pressure Unit: Internal Electronic Failure
  • The ABS module and HCU are serviced as an assembly and should not be swapped between different vehicles. This DTC sets when the identification data stored in the ABS module does not match the identification data from the HCU .
  • Using a diagnostic scan tool, CARRY OUT the Inlet Valve Calibration routine and then the Master Cylinder Isolation Calibration routine.
  • CLEAR the DTC and REPEAT the self-test. If the DTC returns, INSTALL a new ABS module and HCU assembly.
    REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
P193B:86 Throttle / Pedal Signal: Signal Invalid This DTC sets when the ABS module receives invalid network data from the PCM . RETRIEVE and REPAIR all non-network Diagnostic Trouble Codes (DTCs) in the PCM .
REFER to: Electronic Engine Controls (303-14B Electronic Engine Controls - 1.6L EcoBoost (132kW/180PS) - Sigma, Diagnosis and Testing).
REFER to: Electronic Engine Controls (303-14C Electronic Engine Controls - 2.0L EcoBoost (184kW/250PS) - MI4, Diagnosis and Testing).
REFER to: Electronic Engine Controls (303-14D Electronic Engine Controls - 2.5L Duratec (125kW/170PS), Diagnosis and Testing).
U0001:88 High Speed CAN Communication Bus: Bus Off
  • The module could not communicate on the network at a point in time. The fault is not currently present since the module had to communicate with the diagnostic scan tool to report this DTC .
  • VERIFY the integrity of the connectors and wiring. Refer to Wiring Diagrams Cell 14 for schematic and connector information.
  • DIAGNOSE no HS-CAN communication, all modules are not responding.
    REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).
U0100:00 Lost Communication With ECM / PCM "A": No Sub Type Information   GO to Pinpoint Test I
U0104:00 Lost Communication With Cruise Control Module: No Sub Type Information   GO to Pinpoint Test P
U0131:00 Lost Communication With Power Steering Control Module: No Sub Type Information   GO to Pinpoint Test Q
U0140:00 Lost Communication With Body Control Module: No Sub Type Information   GO to Pinpoint Test D
U0151:00 Lost Communication With Restraints Control Module: No Sub Type Information   GO to Pinpoint Test G
U0151:87 Lost Communication With Restraints Control Module: Missing Message   GO to Pinpoint Test G
U0300:51 Internal Control Module Software Incompatibility: Not Programmed CHECK vehicle service history for recent service actions related to the ABS module. This DTC sets due to incomplete or improper flash programming procedures. If there have been recent service actions with the ABS module, REPEAT the programming procedure as directed by the diagnostic scan tool.
U0401:00 Invalid Data Received From ECM / PCM "A": No Sub Type Information This DTC sets when the ABS module receives invalid network data from the PCM . RETRIEVE and REPAIR all non-network Diagnostic Trouble Codes (DTCs) in the PCM .
REFER to: Electronic Engine Controls (303-14B Electronic Engine Controls - 1.6L EcoBoost (132kW/180PS) - Sigma, Diagnosis and Testing).
REFER to: Electronic Engine Controls (303-14C Electronic Engine Controls - 2.0L EcoBoost (184kW/250PS) - MI4, Diagnosis and Testing).
REFER to: Electronic Engine Controls (303-14D Electronic Engine Controls - 2.5L Duratec (125kW/170PS), Diagnosis and Testing).
U0401:86 Invalid Data Received From ECM / PCM "A": Signal Invalid This DTC sets when the ABS module receives invalid network data from the PCM . RETRIEVE and REPAIR all non-network Diagnostic Trouble Codes (DTCs) in the PCM .
REFER to: Electronic Engine Controls (303-14B Electronic Engine Controls - 1.6L EcoBoost (132kW/180PS) - Sigma, Diagnosis and Testing).
REFER to: Electronic Engine Controls (303-14C Electronic Engine Controls - 2.0L EcoBoost (184kW/250PS) - MI4, Diagnosis and Testing).
REFER to: Electronic Engine Controls (303-14D Electronic Engine Controls - 2.5L Duratec (125kW/170PS), Diagnosis and Testing).
U0405:41 Invalid Data Received From Cruise Control Module: General Checksum Failure This DTC sets when the ABS module receives invalid network data from the CCM . RETRIEVE and REPAIR all non-network Diagnostic Trouble Codes (DTCs) in the CCM .
REFER to: Cruise Control (419-03A Cruise Control, Diagnosis and Testing).
U0405:82 Invalid Data Received From Cruise Control Module: Alive / Sequence Counter Incorrect / Not Updated This DTC sets when the ABS module receives invalid network data from the CCM . RETRIEVE and REPAIR all non-network Diagnostic Trouble Codes (DTCs) in the CCM .
REFER to: Cruise Control (419-03A Cruise Control, Diagnosis and Testing).
U0405:86 Invalid Data Received From Cruise Control Module: Signal Invalid This DTC sets when the ABS module receives invalid network data from the CCM . RETRIEVE and REPAIR all non-network Diagnostic Trouble Codes (DTCs) in the CCM .
REFER to: Cruise Control (419-03A Cruise Control, Diagnosis and Testing).
U0420:00 Invalid Data Received From PSCM : No Sub Type Information This DTC sets when the ABS module receives invalid network data from the PSCM . RETRIEVE and REPAIR all non-network Diagnostic Trouble Codes (DTCs) in the PSCM .
REFER to: Power Steering (211-02 Power Steering, Diagnosis and Testing).
U0420:41 Invalid Data Received From PSCM : General Checksum Failure This DTC sets when the ABS module receives invalid network data from the PSCM . RETRIEVE and REPAIR all non-network Diagnostic Trouble Codes (DTCs) in the PSCM .
REFER to: Power Steering (211-02 Power Steering, Diagnosis and Testing).
U0420:82 Invalid Data Received From PSCM : Alive / Sequence Counter Incorrect / Not Updated This DTC sets when the ABS module receives invalid network data from the PSCM . RETRIEVE and REPAIR all non-network Diagnostic Trouble Codes (DTCs) in the PSCM .
REFER to: Power Steering (211-02 Power Steering, Diagnosis and Testing).
U0420:86 Invalid Data Received From PSCM : Signal Invalid This DTC sets when the ABS module receives invalid network data from the PSCM . RETRIEVE and REPAIR all non-network Diagnostic Trouble Codes (DTCs) in the PSCM .
REFER to: Power Steering (211-02 Power Steering, Diagnosis and Testing).
U0422:00 Invalid Data Received From Body Control Module: No Sub Type Information
  • This DTC sets when the ABS module receives invalid network data from the BCM .
  • The BCM communicates with the ABS module through the GWM . RETRIEVE and REPAIR all Diagnostic Trouble Codes (DTCs) in the GWM .
    REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).
  • If there are no Diagnostic Trouble Codes (DTCs) in the GWM , RETRIEVE and REPAIR all Diagnostic Trouble Codes (DTCs) in the BCM .
    REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Diagnosis and Testing).
U0452:29 Invalid Data Received From Restraints Control Module: Signal Invalid
  • If DTC U0151:00 is present, DIAGNOSE DTC U0151:00 first.
  • This DTC sets when the ABS module receives invalid network data from the RCM .
    REFER to: Airbag Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, Diagnosis and Testing).
U0452:41 Invalid Data Received From Restraints Control Module: General Checksum Failure
  • If DTC U0151:00 is present, DIAGNOSE DTC U0151:00 first.
  • This DTC sets when the ABS module receives invalid network data from the RCM .
    REFER to: Airbag Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, Diagnosis and Testing).
U0452:86 Invalid Data Received From Restraints Control Module: Signal Invalid
  • If DTC U0151:00 is present, DIAGNOSE DTC U0151:00 first.
  • This DTC sets when the ABS module receives invalid network data from the RCM .
    REFER to: Airbag Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, Diagnosis and Testing).
U2002:47 Switch: Watchdog / Safety Failure  
REFER to: Parking Brake (206-05 Parking Brake and Actuation, Diagnosis and Testing).
U2002:96 Switch: Component Internal Failure  
REFER to: Parking Brake (206-05 Parking Brake and Actuation, Diagnosis and Testing).
U2007:46 Valve(s): Calibration / Parameter Memory Failure
  • This DTC sets due to an internal failure of the ABS module or due to a calibration failure between the HCU and the ABS module.
  • Using a diagnostic scan tool, CARRY OUT the Inlet Valve Calibration routine and then the Master Cylinder Isolation Calibration routine.
  • CLEAR the DTC and REPEAT the self-test. If the DTC returns, INSTALL a new ABS module and HCU assembly.
    REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
U2007:62 Valve(s): Signal Compare Failure
  • This DTC sets due to an internal failure of the ABS module or due to a calibration failure between the HCU and the ABS module.
  • CLEAR the DTC and REPEAT the self-test. If the DTC returns, INSTALL a new ABS module and HCU assembly.
    REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
U2024:51 Control Module Cal-Config Data: Not Programmed
  • This DTC is only present when a new ABS module is installed, the ABS module is flashed or the ABS module is reconfigured.
  • Using a diagnostic scan tool, CONFIGURE the ABS module, FOLLOW all diagnostic scan tool instructions.
    REFER to: Module Configuration - System Operation and Component Description (418-01 Module Configuration, Description and Operation).
  • Using a diagnostic scan tool, CARRY OUT the ABS module self-test to clear the DTC .
U2100:00 Initial Configuration Not Complete: No Sub Type Information
  • This DTC is pre-set in a new ABS module and clears automatically when the ABS module is configured correctly.
  • CHECK the service history for recent service actions related to the ABS module. This DTC sets due to incomplete or improper Programmable Module Installation (PMI) procedures.
  • If there have been recent service actions with the ABS module, REPEAT the Programmable Module Installation (PMI) procedure using as-built data.
    REFER to: Module Configuration - System Operation and Component Description (418-01 Module Configuration, Description and Operation).
  • If there have been no recent service actions, INSTALL a new ABS module and HCU assembly to correct the failure to retain the configuration data.
    REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
U2101:00 Control Module Configuration Incompatible: No Sub Type Information
  • CHECK the service history for recent service actions related to the ABS module. This DTC sets due to incomplete or improper Programmable Module Installation (PMI) procedures.
  • If there have been recent service actions with the ABS module, REPEAT the Programmable Module Installation (PMI) procedure as directed by the diagnostic scan tool.
    REFER to: Module Configuration - System Operation and Component Description (418-01 Module Configuration, Description and Operation).
  • If there have been no recent service actions, INSTALL a new ABS module and HCU assembly to correct the failure to retain configuration data.
    REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
U2107:00 Collision Mitigation By Braking: No Sub Type Information
  • This DTC sets when the collision deceleration message from the CCM is sent too often or the duration of the message is too long. This is most likely caused by a network communication concern or an internal failure of the CCM .
  • RETRIEVE and REPAIR all Diagnostic Trouble Codes (DTCs) in the CCM .
    REFER to: Cruise Control (419-03A Cruise Control, Diagnosis and Testing).
U2107:68 Collision Mitigation By Braking: Event Information
  • This DTC sets when the vehicle deceleration detected is implausibly high when compared to the vehicle deceleration requested by the CCM . This is most likely caused by an abrupt stop of the vehicle due to a collision, an extreme driving situation, a mechanical or electrical failure of the cruise control system or an internal failure of the ABS module.
  • RETRIEVE and REPAIR all other ABS module Diagnostic Trouble Codes (DTCs) before diagnosing DTC U2107:68.
  • If there are no other ABS module Diagnostic Trouble Codes (DTCs) present, RETRIEVE and REPAIR all Diagnostic Trouble Codes (DTCs) in the CCM .
    REFER to: Cruise Control (419-03A Cruise Control, Diagnosis and Testing).
  • If there are no Diagnostic Trouble Codes (DTCs) in the CCM , INSPECT the vehicle braking system for a dragging condition or another condition that may cause rapid vehicle deceleration.
U2108:00 Adaptive Cruise Control: No Sub Type Information
  • In order to detect errors in the CCM , the cruise control system is momentarily shut off during a driver braking event. This DTC sets when the ABS module detects cruise control system activation during a driver braking event. This is most likely caused by a network communication concern or an internal failure of the CCM .
  • RETRIEVE and REPAIR all Diagnostic Trouble Codes (DTCs) in the CCM .
    REFER to: Cruise Control (419-03A Cruise Control, Diagnosis and Testing).
U2108:68 Adaptive Cruise Control: Event Information
  • The ABS module motors vehicle deceleration during adaptive cruise control braking events to prevent an over-braking situation. This DTC sets when vehicle deceleration is greater than 3.2 meters per second 2 . This is most likely caused by an abrupt stop of the vehicle due to a collision, an extreme driving situation, a mechanical or electrical failure of the adaptive cruise control system or an internal failure of the ABS module.
  • RETRIEVE and REPAIR all other ABS module Diagnostic Trouble Codes (DTCs) before diagnosing DTC U2108:68.
  • If there are no other ABS module Diagnostic Trouble Codes (DTCs) present, RETRIEVE and REPAIR all Diagnostic Trouble Codes (DTCs) in the CCM .
    REFER to: Cruise Control (419-03A Cruise Control, Diagnosis and Testing).
  • If there are no Diagnostic Trouble Codes (DTCs) in the CCM , INSPECT the vehicle braking system for a dragging condition or another condition that may cause rapid vehicle deceleration.
U2200:00 Control Module Configuration Memory Corrupt: No Sub Type Information
  • CHECK the service history for recent service actions related to the ABS module. This DTC sets due to incomplete or improper Programmable Module Installation (PMI) procedures.
  • If there have been recent service actions with the ABS module, REPEAT the Programmable Module Installation (PMI) procedure as directed by the diagnostic scan tool.
    REFER to: Module Configuration - System Operation and Component Description (418-01 Module Configuration, Description and Operation).
  • If there have been no recent service actions, INSTALL a new ABS module and HCU assembly to correct the failure to retain configuration data.
    REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
U3000:49 Control Module: Internal Electronic Failure
  • CLEAR the Diagnostic Trouble Codes (DTCs). CARRY OUT the ABS module self-test. RETRIEVE and RECORD all Diagnostic Trouble Codes (DTCs).
  • If the DTC returns INSTALL a new ABS module and HCU assembly.
    REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
U3002:62 Vehicle Identification Number: Signal Compare Failure   GO to Pinpoint Test N
U3003:08 Battery Voltage: Bus Signal / Message Failure
  • This DTC sets when the HS-CAN is shorted together, shorted to ground, shorted to voltage or open.
  • If DTC U3003:16 is present, DIAGNOSE DTC U3003:16 before diagnosing DTC U3003:08.
  • If DTC U3003:16 is not present,
    REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).
U3003:16 Battery Voltage: Circuit Voltage Below Threshold   GO to Pinpoint Test A
U3003:17 Battery Voltage: Circuit Voltage Above Threshold   GO to Pinpoint Test F
U3003:1C Battery Voltage: Circuit Voltage Out of Range   GO to Pinpoint Test A
U300A:29 Ignition Switch: Signal Invalid
  • If ABS module DTC U0001:88, U0140:00 or U0422:00 is present, DIAGNOSE that DTC before diagnosing DTC U300A:29.
  • If ABS module DTC U0001:88, U0140:00 or U0422:00 is not present, GO to Pinpoint Test A


Symptom Chart(s)

Symptom Chart: Anti-Lock Brake System (ABS) and Stability Control

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices.
REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).



  Symptom Chart


Condition Possible Sources Actions
A module does not respond to the diagnostic scan tool
  • Fuse
  • Wiring, terminals or connectors
  • ABS module concern
The brake warning indicator is always or never on
  • Low brake fluid level
  • Brake fluid level sensor
  • Parking brake applied
  • Parking brake switch
  • Brake booster vacuum sensor
  • IPC concern
  • ABS concern
  • RETRIEVE all ABS module Diagnostic Trouble Codes (DTCs) and GO to the DTC Chart: Anti-Lock Brake System (ABS) Module.
  • If there are no Diagnostic Trouble Codes (DTCs) present in the ABS module, DIAGNOSE the warning indicator.
    REFER to: Instrumentation, Message Center and Warning Chimes (413-01 Instrumentation, Message Center and Warning Chimes, Diagnosis and Testing).
The ABS warning indicator is always or never on
  • IPC concern
  • ABS or stability control concern
  • RETRIEVE all ABS module Diagnostic Trouble Codes (DTCs) and GO to the DTC Chart: Anti-Lock Brake System (ABS) Module.
  • If there are no Diagnostic Trouble Codes (DTCs) present in the ABS module, DIAGNOSE the warning indicator.
    REFER to: Instrumentation, Message Center and Warning Chimes (413-01 Instrumentation, Message Center and Warning Chimes, Diagnosis and Testing).
The stability / traction control indicator (sliding-car icon) is never or always on
  • IPC concern
  • ABS or stability control concern
  • RETRIEVE all ABS module Diagnostic Trouble Codes (DTCs) and GO to the DTC Chart: Anti-Lock Brake System (ABS) Module.
  • If there are no Diagnostic Trouble Codes (DTCs) present in the ABS module, DIAGNOSE the warning indicator.
    REFER to: Instrumentation, Message Center and Warning Chimes (413-01 Instrumentation, Message Center and Warning Chimes, Diagnosis and Testing).
ABS false activation, ABS too sensitive, ABS activates on normal stop Front or rear suspension concern ELIMINATE the front and rear suspension as the cause of the problem.
REFER to: Suspension System (204-00 Suspension System - General Information, Diagnosis and Testing).
RCM mounting CONFIRM the RCM is mounted correctly.
REFER to: Restraints Control Module (RCM) (501-20B Supplemental Restraint System, Removal and Installation).
Loose wheel speed sensor or excessive air gap INSPECT wheel speed sensor for looseness or excessive air gap. TIGHTEN or INSTALL new as necessary. For front wheel speed sensors,
REFER to: Front Wheel Speed Sensor (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
For rear wheel speed sensors, REFER to: Rear Wheel Speed Sensor (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
Parking brake out of adjustment (dragging)  
REFER to: Parking Brake (206-05 Parking Brake and Actuation, Diagnosis and Testing).
The traction control system cannot be disabled Refer to the Pinpoint Test   GO to Pinpoint Test E


Pinpoint Tests

U3003:16, U3003:1C, U300A:29


Refer to Wiring Diagrams Cell 42 for schematic and connector information.

Normal Operation and Fault Conditions

The ABS module, hydraulic pump and solenoid valves require an operating voltage between 10 and 17 volts. The parking brake system requires an operating voltage of 9 volts or higher. The ABS module receives this voltage from the BJB . The ABS module has a single ground circuit located in the engine compartment wiring harness. The ABS module sets this DTC if there is excessive resistance or an open in one or more of these circuits, a discharged battery or an inoperative charging system.



  DTC Fault Trigger Conditions


DTC Description Fault Trigger Conditions
U3003:16 Battery Voltage: Circuit Voltage Below Threshold This DTC sets in continuous memory and on-demand if the voltage supplied to the ABS module falls below 10 volts.
U3003:1C Battery Voltage: Circuit Voltage Out of Range This DTC sets in continuous memory and on-demand if the voltage supplied to the ABS module is below 9 volts for more than one second during a parking brake application request.
U300A:29 Ignition Switch: Signal Invalid This DTC sets in continuous memory and on-demand if the voltage signal from the ignition run-start bus in the BJB does not match the voltage message from the BCM .


Possible Causes

Visual Inspection and Diagnostic Pre-checks


PINPOINT TEST A : U3003:16, U3003:1C, U300A:29
A1   RECHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using a diagnostic scan tool, clear the ABS module Diagnostic Trouble Codes (DTCs).
  • Ignition OFF.
  • Ignition ON.
  • Using a diagnostic scan tool, carry out the ABS module self-test.

Is DTC U3003:16, U3003:1C or U300A:29 still present?

Yes GO to A2
No The system is operating correctly at this time. The DTC may have set due to a previous low battery voltage condition.


A2   CHECK FOR CHARGING SYSTEM DIAGNOSTIC TROUBLE CODES (DTCS) IN THE POWERTRAIN CONTROL MODULE (PCM)
  • Using a diagnostic scan tool, retrieve all Continuous Memory Diagnostic Trouble Codes (CMDTCs).

Is DTC B1317, B1318, B1676, U3003:16 or U3003:17 present in one or more modules AND are any charging system Diagnostic Trouble Codes (DTCs) present in the PCM ?

Yes DIAGNOSE the vehicle charging concern,
REFER to: Charging System (414-00 Charging System - General Information, Diagnosis and Testing).
No GO to A3


A3   CHECK THE BATTERY CONDITION AND STATE OF CHARGE
  • Carry out the Battery Condition Test.
    REFER to: Battery (414-01 Battery, Mounting and Cables, Diagnosis and Testing).

Did the battery pass the condition test?

Yes If the battery passed the condition test but required a recharge, DIAGNOSE the charging system.
REFER to: Charging System (414-00 Charging System - General Information, Diagnosis and Testing).

If the battery passed the condition test and did not require a recharge, GO to A4
No INSTALL a new battery.
REFER to: Battery (414-01 Battery, Mounting and Cables, Removal and Installation).


A4   CHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE VOLTAGE (VPWR_ABS) PARAMETER IDENTIFICATION (PID)
  • Ignition ON.
  • Measure and record the voltage at the battery.
  • Using a diagnostic scan tool, monitor the VPWR_ABS Parameter Identification (PID).

Is the Parameter Identification (PID) display within 0.2 volt of the recorded battery voltage?

Yes GO to A7
No GO to A5


A5   CHECK THE ANTI-LOCK BRAKE SYSTEM (ABS) MODULE VOLTAGE SUPPLY
  • Ignition OFF.
  • Disconnect ABS module C135.
  • Ignition ON.
  • Measure:


    Positive Lead Measurement / Action Negative Lead
      C135-1   Ground
      C135-30   Ground
      C135-35   Ground



Is each voltage within 0.2 volt of the recorded battery voltage?

Yes GO to A6
No VERIFY BJB fuses 25 (10A), 69 (30A) and 82 (60A) are OK.
If OK, REPAIR the affected circuit for high resistance or an open.
If not OK, REFER to the Wiring Diagrams manual to identify the cause of the circuit short.


A6   CHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE GROUND CIRCUIT FOR AN OPEN
  • Ignition OFF.
  • Measure:


    Positive Lead Measurement / Action Negative Lead
      C135-14   Ground



Is the resistance less than 3 ohms?

Yes GO to A7
No REPAIR the circuit.


A7   CHECK FOR CORRECT ABS (ANTI-LOCK BRAKE SYSTEM) MODULE OPERATION
  • Ignition OFF.
  • Disconnect and inspect ABS module C135 (if not previously disconnected).
  • Repair:
    • corrosion (install new connector or terminal - clean module pins)
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
  • Connect ABS module C135. Make sure it seats and latches correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?

Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new ABS module and HCU assembly.
REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.



Wheel Speed Sensor Erratic Signal DTCs

Normal Operation and Fault Conditions

The wheel speed sensor and encoder (tone wheel) generate a square wave signal proportional to wheel speed and sends this information to the ABS module. The wheel bearing, encoder and wheel speed sensor must be undamaged and free from contamination to produce a clean signal for use by the ABS module. Also, all 4 tires and wheels must be of the same manufacturer recommended size for the wheel speed sensor to generate an accurate wheel speed.



  DTC Fault Trigger Conditions


DTC Description Fault Trigger Conditions
C0030:07, C0033:07, C0036:07, C0039:07 Tone Wheel: Mechanical Failure These Diagnostic Trouble Codes (DTCs) set in continuous memory and on-demand if there is damage to the wheel speed sensor encoder, damage to the wheel bearing, or contamination or deformation of the wheel bearing seal.
C0031:07, C0034:07, C0037:07, C003A:07 Wheel Speed Sensor: Mechanical Failure These Diagnostic Trouble Codes (DTCs) set in continuous memory and on-demand if the wheel speed sensor, encoder or wheel bearing is damaged, or if the wheel bearing is not installed correctly. These Diagnostic Trouble Codes (DTCs) also set if an incorrectly sized tire is installed on the vehicle or if an excessive air gap exists between the wheel speed sensor and the encoder due to an incorrect component being installed.
C0031:29, C0034:29, C0037:29, C003A:29 Wheel Speed Sensor: Signal Invalid These Diagnostic Trouble Codes (DTCs) set in continuous memory and on-demand if the wheel speed sensor is damaged, if the encoder is missing or damaged, if there is an excessive gap between the sensor and encoder, if the wrong sensor is installed (bi-directional versus uni-directional) or if the tire size is incorrect for the vehicle.
C0031:2F, C0034:2F, C0037:2F, C003A:2F Wheel Speed Sensor: Signal Erratic These Diagnostic Trouble Codes (DTCs) set in continuous memory and on-demand if the wheel speed sensor is damaged, if the encoder is missing or damaged, if there is an excessive gap between the sensor and encoder or high frequency interference.
C0031:64, C0034:64, C0037:64, C003A:64 Wheel Speed Sensor: Signal Plausibility Failure These Diagnostic Trouble Codes (DTCs) set in continuous memory and on-demand if the wheel speed sensor is damaged, if the encoder is missing or damaged, if there is an excessive gap between the sensor and encoder, if the wrong sensor is installed (bi-directional versus uni-directional) or if the tire size is incorrect for the vehicle.


Possible Causes


PINPOINT TEST B : WHEEL SPEED SENSOR ERRATIC SIGNAL DTCS
B1   CHECK FOR ABS (ANTI-LOCK BRAKE SYSTEM) MODULE DIAGNOSTIC TROUBLE CODES (DTCS)
  • Ignition ON.
  • Using a diagnostic scan tool, carry out the ABS module self-test.
  • Retrieve and record all ABS module Diagnostic Trouble Codes (DTCs).

Is DTC C003x:29 or C003x:64 present?

Yes GO to B2
No If DTC C0031:07, C0034:07, C0037:07 or C0039:0A is present, GO to B3
If DTC C0031:2F, C0034:2F, C0037:2F or C0039:2F is present, GO to B3
If DTC C0030:07, C0033:07, C0036:07 or C0039:07 is present, GO to B6
For all other ABS module Diagnostic Trouble Codes (DTCs), GO to the DTC Chart: Anti-Lock Brake System (ABS) Module.


B2   CHECK THE TIRE SIZE AND PRESSURE
  • Ignition OFF.
  • Verify all the tires and wheels are the same size and the tire size and inflation pressures are correct as indicated on the VC label.

Are the tires and wheels OK?

Yes GO to B3
No INSTALL the correct size tire or wheel or ADJUST tire pressure as necessary.


B3   CHECK THE WHEEL SPEED SENSOR MOUNTING
  • Inspect the wheel speed sensor for correct installation and the fastener for looseness.

Is the wheel speed sensor installed correctly and the fastener tightened to specifications?

Yes GO to B5
No REINSTALL the wheel speed sensor and tighten the fastener to specifications. For front wheel speed sensors,
REFER to: Front Wheel Speed Sensor (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
For rear wheel speed sensors, REFER to: Rear Wheel Speed Sensor (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
GO to B4


B4   CHECK THE WHEEL SPEED SENSOR PARAMETER IDENTIFICATIONS (PIDS)
  • Ignition ON.
  • Using a diagnostic scan tool, access the ABS module Parameter Identifications (PIDs).
  • Drive the vehicle at a speed greater than 20 km/h (12 mph) while monitoring the following Parameter Identifications (PIDs):
    • Left front wheel speed sensor (LF_WSPD)
    • Right front wheel speed sensor (RF_WSPD)
    • Left rear wheel speed sensor (LR_WSPD)
    • Right rear wheel speed sensor (RR_WSPD)

Are the wheel speed Parameter Identifications (PIDs) within 5 km/h (3 mph) of each other and the vehicle speed as indicated on the speedometer?

Yes The system is operating correctly at this time. The concern may have been caused by a loose or incorrectly installed wheel speed sensor.
No GO to B5


B5   CHECK THE WHEEL SPEED SENSOR FOR DAMAGE
  • Ignition OFF.
  • Disconnect the suspect wheel speed sensor electrical connector.
  • Inspect the wheel speed sensor and harness for abrasions, broken connector tabs or water intrusion.

Is the wheel speed sensor and harness OK?

Yes GO to B6
No INSTALL a new wheel speed sensor. For front wheel speed sensors,
REFER to: Front Wheel Speed Sensor (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
For rear wheel speed sensors, REFER to: Rear Wheel Speed Sensor (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).


B6   CHECK WHEEL BEARING AND ENCODER FOR DAMAGE
  • Inspect the wheel bearings for abnormal wear or roughness and for deformation or contamination of the seal and encoder.

Are the wheel bearing and encoder OK?

Yes GO to B7
No INSTALL a new wheel bearing as necessary. For the front wheel bearing,
REFER to: Front Wheel Bearing and Wheel Hub (204-01 Front Suspension, Removal and Installation).

For the rear wheel bearing on AWD vehicles,
REFER to: Wheel Bearing and Wheel Hub - Vehicles With: AWD (204-02 Rear Suspension, Removal and Installation).

For the rear wheel bearing on FWD vehicles,
REFER to: Wheel Bearing and Wheel Hub - Vehicles With: FWD (204-02 Rear Suspension, Removal and Installation).


B7   CHECK FOR CORRECT ABS (ANTI-LOCK BRAKE SYSTEM) MODULE OUTPUT

NOTE: Make sure all test connections are made at the wheel speed sensor before the ignition is set to ON.

NOTE: Use a meter with a min/max feature and/or recording capabilities to obtain accurate measurements. The ABS module disables the voltage output immediately if the wheel speed sensor is not present.

  • Disconnect the suspect wheel speed sensor electrical connector.
  • Connect the meter to the suspect wheel speed sensor electrical connector, harness side.
  • Set the meter to measure DC voltage.
  • Set the meter range to greater than 15 volts.
  • Enable the min/max or recording feature on the meter.
  • Ignition ON.
  • For the LH front wheel speed sensor, measure:


    Positive Lead Measurement / Action Negative Lead
      C150-1   C150-2


  • For the RH front wheel speed sensor, measure:


    Positive Lead Measurement / Action Negative Lead
      C160-1   C160-2


  • For the LH rear wheel speed sensor, measure:


    Positive Lead Measurement / Action Negative Lead
      C440-1   C440-2


  • For the RH rear wheel speed sensor, measure:


    Positive Lead Measurement / Action Negative Lead
      C426-1   C426-2


  • Check the maximum recorded voltage on the meter.

Is the voltage greater than 10 volts?

Yes INSTALL a new wheel speed sensor. For front wheel speed sensors,
REFER to: Front Wheel Speed Sensor (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
For rear wheel speed sensors, REFER to: Rear Wheel Speed Sensor (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
No GO to B8


B8   CHECK FOR CORRECT ABS (ANTI-LOCK BRAKE SYSTEM) MODULE OPERATION
  • Ignition OFF.
  • Disconnect and inspect ABS module C135.
  • Repair:
    • corrosion (install new connector or terminal - clean module pins)
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
  • Connect ABS module C135. Make sure it seats and latches correctly.
  • Connect the suspect wheel speed sensor. Make sure it seats and latches correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?

Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new ABS module and HCU assembly.
REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.



C0040:64, C0044:28


Refer to Wiring Diagrams Cell 31 for schematic and connector information.

Normal Operation and Fault Conditions

The ABS module receives BPP switch (stoplamp switch) input from the PCM through the GWM over the HS-CAN 2. The ABS module compares this information against wheel speed sensor input to determine if the BPP switch input is valid. As vehicle speed decreases, the ABS module looks for a change in the BPP switch input, if vehicle speed decreases but there is no change in the BPP switch, the ABS module sets a DTC . A BPP switch that is incorrectly installed can cause a signal plausibility concern. An implausible signal can also be created if a driver is resting one foot on the brake pedal while using the other foot to press the accelerator.



  DTC Fault Trigger Conditions


DTC Description Fault Trigger Conditions
C0040:64 Brake Pedal Switch "A": Signal Plausibility Failure This DTC sets in continuous memory if BPP switch input is continuously active for more than 6 minutes when driving faster than 20 km/h (12 mph) or after accelerating up to a speed greater than 40 km/h (24 mph) and decelerating down to a speed less than 3 km/h (2 mph) 4 times with no change in brake pedal switch input.
C0044:28 Brake Pressure Sensor "A": Signal Bias Level Out of Range / Zero Adjustment Failure This DTC sets in continuous memory if the BPP switch signal and the brake pressure switch signal, inside the HCU , do not match. This fault could be set by an incorrectly installed stoplamp switch or brake pedal assembly.


Possible Causes

Visual Inspection and Diagnostic Pre-checks


PINPOINT TEST C : C0040:64, C0044:28
C1   CHECK THE STOPLAMP SWITCH AND BRAKE PEDAL ASSEMBLY INSTALLATION
  • Inspect the stoplamp switch and brake pedal assembly, verify there is no brake pedal pressure unintentionally applied due to incorrect stoplamp switch or brake pedal installation.
    REFER to: Stoplamp Switch (417-01 Exterior Lighting, Removal and Installation).
    REFER to: Brake Pedal and Bracket (206-06 Hydraulic Brake Actuation, Removal and Installation).

Are the stoplamp switch and brake pedal assembly installed correctly?

Yes GO to C2
No REINSTALL the stoplamp switch or brake pedal assembly.
REFER to: Stoplamp Switch (417-01 Exterior Lighting, Removal and Installation).
REFER to: Brake Pedal and Bracket (206-06 Hydraulic Brake Actuation, Removal and Installation).


C2   CHECK THE PCM (POWERTRAIN CONTROL MODULE) BPP (BRAKE PEDAL POSITION) (BOO1) PARAMETER IDENTIFICATION (PID)
  • Ignition ON.
  • Using a diagnostic scan tool, monitor the PCM BOO1 Parameter Identification (PID) while pressing and releasing the brake pedal.

Does the Parameter Identification (PID) reflect the brake pedal movement?

Yes GO to C3
No DIAGNOSE the BPP switch.
REFER to: Stoplamps (417-01 Exterior Lighting, Diagnosis and Testing).


C3   CHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE BRAKE ON / OFF (BOO_ABS) PARAMETER IDENTIFICATION (PID)
  • Using a diagnostic scan tool, monitor the ABS module BOO_ABS Parameter Identification (PID) while pressing and releasing the brake pedal.

Does the Parameter Identification (PID) reflect the brake pedal movement?

Yes The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.
No GO to C4


C4   CHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using a diagnostic scan tool, carry out the ABS module self-test.
  • Retrieve and record all ABS module Diagnostic Trouble Codes (DTCs).

Are any communication (U-code) Diagnostic Trouble Codes (DTCs) present?

Yes GO to the DTC Chart: Anti-Lock Brake System (ABS) Module.
No GO to C5


C5   CHECK THE PCM (POWERTRAIN CONTROL MODULE) FOR DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using a diagnostic scan tool, carry out the PCM KOEO self-test.
  • Retrieve and record all PCM Diagnostic Trouble Codes (DTCs).

Are any PCM Diagnostic Trouble Codes (DTCs) present?

Yes GO to the DTC Chart: Powertrain Control Module (PCM).
REFER to: Electronic Engine Controls (303-14B Electronic Engine Controls - 1.6L EcoBoost (132kW/180PS) - Sigma, Diagnosis and Testing).
REFER to: Electronic Engine Controls (303-14C Electronic Engine Controls - 2.0L EcoBoost (184kW/250PS) - MI4, Diagnosis and Testing).
REFER to: Electronic Engine Controls (303-14D Electronic Engine Controls - 2.5L Duratec (125kW/170PS), Diagnosis and Testing).
No GO to C6


C6   CHECK FOR CORRECT ABS (ANTI-LOCK BRAKE SYSTEM) MODULE TO HCU (HYDRAULIC CONTROL UNIT) FASTENER TORQUE VALUES
  • Verify all ABS module-to- HCU fasteners are tightened to their correct torque specifications.

Are the ABS module-to- HCU fasteners tightened correctly

Yes GO to C8
No TIGHTEN all ABS module-to- HCU fasteners to their specified torque value. GO to C7


C7   CHECK FOR RETURNING ABS (ANTI-LOCK BRAKE SYSTEM) MODULE DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using a diagnostic scan tool, clear the ABS module Diagnostic Trouble Codes (DTCs).
  • Ignition OFF.
  • Ignition ON.
  • Using a diagnostic scan tool, carry out the ABS module self-test.

Is DTC C0040:64 or C0044:28 present?

Yes GO to C8
No The condition that caused the concern has been repaired. RETURN the vehicle to the customer.


C8   CHECK FOR CORRECT ABS (ANTI-LOCK BRAKE SYSTEM) MODULE OPERATION
  • Ignition OFF.
  • Disconnect and inspect ABS module C135.
  • Repair:
    • corrosion (install new connector or terminal - clean module pins)
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
  • Connect ABS module C135. Make sure it seats and latches correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?

Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new ABS module and HCU assembly.
REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.



U0140:00


Refer to Wiring Diagrams Cell 42 for schematic and connector information.

Normal Operation and Fault Conditions

With the ignition ON, the BCM sends messages to the ABS module through the GWM over the HS-CAN 1. If the ABS module does not receive these messages within a certain time frame, the module sets Diagnostic Trouble Codes (DTCs). For information on the messages sent to the ABS module by the BCM , refer to the Network Message Chart.
REFER to: Anti-Lock Brake System (ABS) and Stability Control - Vehicles Built Up To: 03-June-2013 - System Operation and Component Description (206-09 Anti-Lock Brake System (ABS) and Stability Control, Description and Operation).



  DTC Fault Trigger Conditions


DTC Description Fault Trigger Conditions
U0140:00 Lost Communication With Body Control Module: No Sub Type Information This DTC sets in continuous memory and on-demand in the ABS module if any one of the following messages is missing from the BCM ; odometer value, parking brake status, vehicle mode or vehicle configuration information.


Possible Causes


PINPOINT TEST D : U0140:00
D1   CHECK THE COMMUNICATION NETWORK
  • Ignition ON.
  • Using a diagnostic scan tool, carry out the Network Test.

Do both the BCM and the GWM pass the Network Test?

Yes GO to D2
No DIAGNOSE the no communication with the BCM or GWM .
REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).


D2   CHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE CONTINUOUS MEMORY DIAGNOSTIC TROUBLE CODES (CMDTCS)
  • Using a diagnostic scan tool, carry out the ABS module self-test.
  • Retrieve and record all ABS module Diagnostic Trouble Codes (DTCs).
  • Clear the Diagnostic Trouble Codes (DTCs).
  • Ignition OFF.
  • Ignition ON.
  • Repeat the ABS module self-test.

Is DTC U0140:00 retrieved again?

Yes GO to D3
No The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.


D3   REVIEW THE RECORDED ABS (ANTI-LOCK BRAKE SYSTEM) MODULE SELF-TEST DIAGNOSTIC TROUBLE CODES (DTCS)
  • Check the recorded Diagnostic Trouble Codes (DTCs) from the ABS module self-test.

Was DTC U3003:16 or U3003:17 recorded in the ABS module?

Yes For DTC U3003:16, GO to Pinpoint Test A
For DTC U3003:17, GO to Pinpoint Test F
No GO to D4


D4   RETRIEVE ANY DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE GWM (GATEWAY MODULE A)
  • Using a diagnostic scan tool, carry out the GWM self-test.

Are any Diagnostic Trouble Codes (DTCs) present in the GWM ?

Yes GO to the DTC Chart: GWM .
REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).
No GO to D5


D5   RETRIEVE ANY DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE BCM (BODY CONTROL MODULE)
  • Using a diagnostic scan tool, carry out the BCM self-test.

Is DTC U3003:16 or U3003:17 recorded?

Yes
REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Diagnosis and Testing).
No GO to D6


D6   CHECK FOR DTC (DIAGNOSTIC TROUBLE CODE) U0140:00 SET IN OTHER MODULES
  • Using the diagnostic scan tool, carry out the self-test for all modules.
  • Retrieve and record the Continuous Memory Diagnostic Trouble Codes (CMDTCs) from all modules.

Is DTC U0140:00 set in 1 or more modules in addition to the ABS module?

Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new BCM .
REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Removal and Installation).
No CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions.
If no Technical Service Bulletins (TSBs) address this concern and DTC U0140:00 was set by the ABS module, INSTALL a new ABS module and HCU assembly.
REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).



The Traction Control System Cannot Be Disabled


Refer to Wiring Diagrams Cell 60 for schematic and connector information.

Normal Operation and Fault Conditions

The stability-traction control disabled indicator (sliding car OFF icon) in the IPC provides traction control system status to the driver. When the driver deactivates the traction control, the IPC sends a message to the GWM over the HS-CAN 3 indicating the driver has requested the traction control to be disabled. The GWM relays this message to the ABS module over the HS-CAN 2. The ABS module continues to monitor for excessive wheel spin, but no longer takes any action when a traction event is detected.

The ABS module then sends a message to the GWM over the HS-CAN 2 to illuminate the stability-traction control disabled indicator (sliding car OFF icon). The GWM relays this message to the IPC over the M HS-CAN 3. The IPC responds by illuminating the stability-traction control disabled indicator (sliding car OFF icon). The traction control system remains deactivated until the driver changes the traction control state in the message center or until the ignition is cycled.

If equipped, MyKey® allows users to configure traction control to be either always on or selectable. If a MyKey® restricted key is in use with the AdvanceTrac® always on feature configured to "on", the traction control system cannot be disabled. An admin key must be used to enable and disable the traction control system.

NOTE: For vehicles equipped with Intelligent Access (IA), this test requires the use of at least 2 Intelligent Access (IA) keys programmed to the vehicle, one admin Intelligent Access (IA) key and one restricted Intelligent Access (IA) key.

NOTE: For vehicles not equipped with Intelligent Access (IA), this test requires the use of at least 2 Integrated Keyhead Transmitters (IKTs) programmed to the vehicle, one admin Integrated Keyhead Transmitter (IKT) and one restricted Integrated Keyhead Transmitter (IKT).

Possible Causes


PINPOINT TEST E : THE TRACTION CONTROL SYSTEM CANNOT BE DISABLED
E1   VERIFY THE KEY IN USE IS NOT RESTRICTED
  • Place 1 Intelligent Access (IA) key inside the vehicle and all other Intelligent Access (IA) keys at least 1 meter (3 feet) away from the vehicle.
  • Press the start button without pressing the brake pedal.
  • Monitor the message center.

Does the message center display MYKEY ACTIVE DRIVE SAFELY?

Yes The current Intelligent Access (IA) key is a restricted key and is functioning correctly.
REPEAT the test using different Intelligent Access (IA) keys until the message center does not display MYKEY ACTIVE DRIVE SAFELY. GO to E2
No GO to E2


E2   VERIFY THE MYKEY® TRACTION CONTROL SETTING IN THE MYKEY® MENU
  • Using the message center, verify the MyKey® traction control setting. Refer to the Owner's Literature for information on setting the MyKey® functions.

Is the MyKey® traction control setting configured to "always on"?

Yes GO to E3
No GO to E4


E3   VERIFY THE TRACTION CONTROL FUNCTION CAN BE DISABLED USING THE INTELLIGENT ACCESS (IA) ADMIN KEY IN THE DRIVER ASSIST MENU
  • Using the message center, verify the traction control function can be enabled and disabled using the admin Intelligent Access (IA) key. Refer to the Owner's Literature for information on enabling and disabling the traction control function.

Can the traction control function can be enabled and disabled using the admin Intelligent Access (IA) key?

Yes The system is operating correctly at this time. The concern was most likely caused by the use of a restricted Intelligent Access (IA) key.
INFORM the customer that traction control function can only be disabled using an admin Intelligent Access (IA) key when the MyKey® traction control setting is configured to "always on".
No GO to E4


E4   CHECK FOR ABS (ANTI-LOCK BRAKE SYSTEM) MODULE DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using a diagnostic scan tool, carry out the ABS self-test.
  • Retrieve and record all ABS Diagnostic Trouble Codes (DTCs).

Are there any ABS Diagnostic Trouble Codes (DTCs) present?

Yes GO to the DTC Chart: Anti-Lock Brake System (ABS) Module.
No GO to E5


E5   CHECK FOR GWM (GATEWAY MODULE A) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using a diagnostic scan tool, carry out the GWM self-test.
  • Retrieve and record all GWM Diagnostic Trouble Codes (DTCs).

Are any Diagnostic Trouble Codes (DTCs) present in the GWM ?

Yes GO to the DTC Chart: GWM .
REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).
No GO to E6


E6   CHECK FOR IPC (INSTRUMENT PANEL CLUSTER) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using a diagnostic scan tool, carry out the IPC self-test.
  • Retrieve and record all IPC Diagnostic Trouble Codes (DTCs).

Are there any IPC Diagnostic Trouble Codes (DTCs) present?

Yes GO to the DTC Chart: Instrument Panel Cluster (IPC)
REFER to: Instrumentation, Message Center and Warning Chimes (413-01 Instrumentation, Message Center and Warning Chimes, Diagnosis and Testing).
No The system is operating correctly at this time. The concern may have been caused due to high network traffic or an intermittent fault condition.



U3003:17

Normal Operation and Fault Conditions

The ABS module, hydraulic pump and solenoid valves require an operating voltage between 10 and 17 volts. The ABS module receives this voltage from the BJB . The ABS module has a single ground circuit located in the engine compartment wiring harness. An overcharging condition in the charging system results in the ABS module setting a DTC . This DTC may also set in the ABS module due to battery charging or vehicle jump starting events.



  DTC Fault Trigger Conditions


DTC Description Fault Trigger Conditions
U3003:17 Battery Voltage: Circuit Voltage Above Threshold This DTC sets in continuous memory and on-demand if the voltage supplied to the ABS module is above 17 volts.


Possible Causes


PINPOINT TEST F : U3003:17
F1   CHECK FOR HIGH VOLTAGE DIAGNOSTIC TROUBLE CODES (DTCS) SET IN OTHER MODULES
  • Ignition ON.
  • Using a diagnostic scan tool, retrieve and record all Continuous Memory Diagnostic Trouble Codes (CMDTCs).

Is DTC B1317, B1318, B1676, U3003:16 or U3003:17 present in one or more modules AND are any charging system Diagnostic Trouble Codes (DTCs) present in the PCM ?

Yes DIAGNOSE the overcharging condition.
REFER to: Charging System (414-00 Charging System - General Information, Diagnosis and Testing).
No GO to F2


F2   CHECK THE BATTERY VOLTAGE
  • Turn off all interior lights, exterior lights and accessories.
  • Start and run the engine at approximately 1,500 Revolutions Per Minute (RPM) for 3 minutes while monitoring the battery voltage.

Is the battery voltage between 13 and 15.2 volts ?

Yes GO to F3
No DIAGNOSE the overcharging condition.
REFER to: Charging System (414-00 Charging System - General Information, Diagnosis and Testing).


F3   RECHECK FOR DTC (DIAGNOSTIC TROUBLE CODE) U3003:17
  • Turn the engine off.
  • Ignition ON.
  • Using a diagnostic scan tool, carry out the ABS module self-test.
  • Clear the ABS module Diagnostic Trouble Codes (DTCs).
  • Ignition OFF.
  • Ignition ON.
  • Repeat the ABS module self-test.

Is DTC U3003:17 still present?

Yes GO to F4
No The system is operating normally at this time. The DTC may have been set previously during battery charging or while jump starting the vehicle.


F4   CHECK FOR CORRECT ABS (ANTI-LOCK BRAKE SYSTEM) MODULE OPERATION
  • Ignition OFF.
  • Disconnect and inspect ABS module C135 (if not previously disconnected).
  • Repair:
    • corrosion (install new connector or terminal - clean module pins)
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
  • Connect ABS module C135. Make sure it seats and latches correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?

Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new ABS module and HCU assembly.
REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.



Stability Control Sensor Signal Failure DTCs


Refer to Wiring Diagrams Cell 42 for schematic and connector information.

Normal Operation and Fault Conditions

The ABS module receives vehicle yaw rate, lateral acceleration, longitudinal acceleration and roll rate from RCM over the HS-CAN 2. The yaw rate sensor, lateral accelerometer, longitudinal accelerometer and roll rate sensor are contained in the RCM . A failure of the HS-CAN 2, an internal failure of the RCM or the internal sensors causes the ABS to set one or more Diagnostic Trouble Codes (DTCs).



  DTC Fault Trigger Conditions


DTC Description Fault Trigger Conditions
C0061:28, C0062:28, C0063:28, C0064:28 Lateral Acceleration Sensor, Longitudinal Acceleration Sensor, Yaw Rate Sensor, Roll Rate Sensor: Signal Bias Level Out of Range / Zero Adjustment Failure These Diagnostic Trouble Codes (DTCs) set in continuous memory and on-demand if the sensor signal is greater than the programmed maximum plausible sensor signal.
C0061:2F, C0063:2F Lateral Acceleration Sensor, Yaw Rate Sensor: Signal Erratic These Diagnostic Trouble Codes (DTCs) set in continuous memory and on-demand if the lateral acceleration sensor signal is out of range when the vehicle is standing still.
C0061:64, C0062:64, C0063:64, C0064:64 Lateral Acceleration Sensor, Longitudinal Acceleration Sensor, Yaw Rate Sensor, Roll Rate Sensor: Signal Plausibility Failure These Diagnostic Trouble Codes (DTCs) set in continuous memory and on-demand if the sensor signal does not match the other stability sensor signals.
U0151:00 Lost Communication With Restraints Control Module: No Sub Type Information This DTC sets in continuous memory and on-demand if the expected RCM messages such as yaw rate sensor, lateral and longitudinal accelerometers are missing for more than 5 seconds.
U0151:87 Lost Communication With Restraints Control Module: No Sub Type Information This DTC sets in continuous memory and on-demand if the RCM status messages is missing.


Possible Causes


PINPOINT TEST G : STABILITY CONTROL SENSOR SIGNAL FAILURE DTCS
G1   CHECK THE COMMUNICATION NETWORK
  • Ignition ON.
  • Using the diagnostic scan tool, carry out the Network Test.

Does the RCM pass the Network Test?

Yes GO to G2
No DIAGNOSE the RCM does not communicate with the diagnostic scan tool.
REFER to: Module Configuration - System Operation and Component Description (418-01 Module Configuration, Description and Operation).


G2   RECHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE FOR DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using a diagnostic scan tool, carry out the ABS module self-test.
  • Retrieve and record all ABS module Diagnostic Trouble Codes (DTCs).
  • Clear the Diagnostic Trouble Codes (DTCs).
  • Ignition OFF.
  • Ignition ON.
  • Repeat the ABS module self-test.

Are any of the Diagnostic Trouble Codes (DTCs) in the DTC Fault Trigger Conditions table retrieved again?

Yes GO to G3
No For all other Diagnostic Trouble Codes (DTCs), GO to the DTC Chart: Anti-Lock Brake System (ABS) Module.
If no Diagnostic Trouble Codes (DTCs) return, the system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.


G3   CHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE FOR BATTERY VOLTAGE DIAGNOSTIC TROUBLE CODES (DTCS)
  • Check the previously recorded Diagnostic Trouble Codes (DTCs) from the ABS module self-test.

Is DTC U3003:16 or U3003:17 recorded in the ABS module?

Yes For ABS module DTC U3003:16, GO to Pinpoint Test A
For ABS module DTC U3003:17, GO to Pinpoint Test F
No GO to G4


G4   RETRIEVE ANY DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE RCM (RESTRAINTS CONTROL MODULE) SELF-TEST
  • Using a diagnostic scan tool, carry out the RCM self-test.

Is DTC U3003:16 or U3003:17 recorded in the RCM ?

Yes
REFER to: Airbag Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, Diagnosis and Testing).
No GO to G5


G5   CHECK FOR DTC (DIAGNOSTIC TROUBLE CODE) U0151:00 SET IN OTHER MODULES
  • Using the diagnostic scan tool, carry out the self-test for all modules.
  • Retrieve and record the Continuous Memory Diagnostic Trouble Codes (CMDTCs) from all modules.

Is DTC U0151:00 set in 1 or more modules in addition to the ABS module?

Yes GO to G7
No GO to G6


G6   VERIFY THE RCM (RESTRAINTS CONTROL MODULE) PART NUMBER
  • Using a diagnostic scan tool, retrieve and record the RCM part number from the log viewer.
  • Check the part number recorded against the number listed in the parts catalog or equivalent.

Does the part number on the RCM match the part number listed in the parts catalog?

Yes The condition that set the DTC is not present at this time. The concern may have been caused due to a failed or an incomplete initialization.
No INSTALL the correct RCM .
REFER to: Restraints Control Module (RCM) (501-20B Supplemental Restraint System, Removal and Installation).


G7   CHECK FOR CORRECT RCM (RESTRAINTS CONTROL MODULE) OPERATION

WARNING: Turn the ignition OFF and wait one minute to deplete the backup power supply. Failure to follow this instruction may result in serious personal injury or death in the event of an accidental deployment.

  • Ignition OFF.
  • Wait one minute then disconnect and inspect RCM C310A and C310B.
  • Repair:
    • corrosion (install new connector or terminal - clean module pins)
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
  • Connect RCM C310A and C310B. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?

Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new RCM .
REFER to: Restraints Control Module (RCM) (501-20B Supplemental Restraint System, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.



C0020:13, C0020:71


Refer to Wiring Diagrams Cell 42 for schematic and connector information.

Normal Operation and Fault Conditions

The ABS module uses an internal solid state switch to operate the hydraulic pump motor. The ABS module tests the hydraulic pump motor by activating it for 30 milliseconds. The ABS module monitors the voltage drop across the hydraulic pump motor while the pump motor is being activated. After 30 milliseconds have passed, the ABS module stops applying voltage to the pump motor and monitors the voltage the spinning hydraulic pump motor is generating and the voltage drop across the hydraulic pump motor solid state switch. If the monitored voltages are not within the specifications, the ABS module sets one or more Diagnostic Trouble Codes (DTCs).



  DTC Fault Trigger Conditions


DTC Description Fault Trigger Conditions
C0020:13 ABS Pump Motor Control: Circuit Open This DTC sets in continuous memory and on-demand if the voltage supplied to the ABS module is less than 10 volts, if there is an open or high resistance on the ABS pump motor circuit between the ABS module and the HCU , or if the ABS module is faulted internally.
C0020:71 ABS Pump Motor Control: Actuator Stuck This DTC sets in continuous memory and on-demand if the ABS module detects the hydraulic pump motor is not rotating when it is commanded to run.


Possible Causes

Visual Inspection and Diagnostic Pre-checks


PINPOINT TEST H : C0020:13, C0020:71
H1   VERIFY ALL WIRING CONNECTIONS
  • Ignition OFF.
  • Disconnect ABS module C135.
  • Using a good light source, inspect each connector terminal for any corrosion.
  • Inspect the connector for any pushed-out terminals.
  • Using a suitable mating terminal, check each connector terminal for deformed or enlarged contacts by comparing the mating terminal's fit between each of the following pins:
    • C135-1
    • C135-14

Is connector free of terminal corrosion, pushed-out terminals and spread terminals?

Yes GO to H2
No REPAIR the affected terminal.
Refer to Wiring Diagrams Cell 5 for schematic and connector information.


H2   CHECK PUMP MOTOR OPERATION
  • Connect ABS module C135.
  • Ignition ON.
  • Using a diagnostic scan tool, activate the ABS pump motor (PMP_MTR) active command.
  • Listen for the ABS pump motor noise.

Does the ABS pump motor run for approximately 2 seconds?

Yes GO to H3
No GO to H4


H3   CHECK FOR FAULT REPEATABILITY
  • Using a diagnostic scan tool, clear the ABS module Diagnostic Trouble Codes (DTCs).
  • Ignition OFF.
  • Ignition ON.
  • Test drive the vehicle at speeds greater than 20 km/h (12 mph) and carry out at least 1 ABS stop.
  • Ignition OFF.
  • Ignition ON.
  • Using a diagnostic scan tool, carry out the ABS module self-test.
  • Retrieve and record all ABS module Diagnostic Trouble Codes (DTCs).

Are any ABS module Diagnostic Trouble Codes (DTCs) retrieved?

Yes For DTC C0020:13 and 71, GO to H6
For all other ABS module Diagnostic Trouble Codes (DTCs), GO to the DTC Chart: Anti-Lock Brake System (ABS) Module.
No The concern that caused the DTC is not present at this time.
DISCONNECT and INSPECT ABS module C135. CLEAR or REPAIR the connector as necessary. ADDRESS the root cause of any connector or pin issues.


H4   CHECK THE PUMP MOTOR VOLTAGE SUPPLY TO THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE
  • Ignition OFF.
  • Disconnect ABS module C135.
  • Measure:


    Positive Lead Measurement / Action Negative Lead
      C135-1   Ground



Is the voltage greater than 11 volts?

Yes GO to H5
No VERIFY BJB fuse 82 (60A) is OK. If OK, REPAIR the circuit.
If not OK, REFER to the Wiring Diagrams manual to identify the cause of the circuit short.


H5   CHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE GROUND CIRCUIT FOR AN OPEN
  • Ignition OFF.
  • Measure:


    Positive Lead Measurement / Action Negative Lead
      C135-14   Ground



Is the resistance less than 3 ohms?

Yes GO to H6
No REPAIR the circuit.


H6   CHECK FOR CORRECT ABS (ANTI-LOCK BRAKE SYSTEM) MODULE OPERATION
  • Ignition OFF.
  • Disconnect and inspect ABS module C135 (if not previously disconnected).
  • Repair:
    • corrosion (install new connector or terminal - clean module pins)
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
  • Connect ABS module C135. Make sure it seats and latches correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?

Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new ABS module and HCU assembly.
REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.



U0100:00


Refer to Wiring Diagrams Cell 42 for schematic and connector information.

Normal Operation and Fault Conditions

With the ignition ON, the PCM sends messages to the ABS module through the GWM over the HS-CAN 1. If the ABS module does not receive these messages within a certain time frame (usually less than 1 second), the ABS module sets Diagnostic Trouble Codes (DTCs). For information on the messages sent to the ABS module by the PCM , refer to the Network Message Chart.
REFER to: Anti-Lock Brake System (ABS) and Stability Control - Vehicles Built Up To: 03-June-2013 - System Operation and Component Description (206-09 Anti-Lock Brake System (ABS) and Stability Control, Description and Operation).



  DTC Fault Trigger Conditions


DTC Description Fault Trigger Conditions
U0100:00 Lost Communication With ECM / PCM "A": No Sub Type Information This DTC sets in continuous memory and on-demand when any of the messages from the PCM is missing. This can be due to a PCM failure, a circuit failure on the HS-CAN or an excessive load on the network.


Possible Causes


PINPOINT TEST I : U0100:00
I1   CHECK THE COMMUNICATION NETWORK
  • Ignition ON.
  • Using a diagnostic scan tool, carry out the Network Test.

Do both the PCM and the GWM pass the Network Test?

Yes GO to I2
No DIAGNOSE the no communication with the PCM or GWM .
REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).


I2   CHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE CONTINUOUS MEMORY DIAGNOSTIC TROUBLE CODES (CMDTCS)
  • Using a diagnostic scan tool, carry out the ABS module self-test.
  • Clear the Diagnostic Trouble Codes (DTCs).
  • Ignition OFF.
  • Ignition ON.
  • Using a diagnostic scan tool, carry out the ABS module self-test.
  • Record the ABS module Diagnostic Trouble Codes (DTCs).

Is DTC U0100:00 retrieved again?

Yes GO to I3
No The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.


I3   REVIEW THE RECORDED ABS (ANTI-LOCK BRAKE SYSTEM) MODULE SELF-TEST DIAGNOSTIC TROUBLE CODES (DTCS)
  • Check the recorded Diagnostic Trouble Codes (DTCs) from the ABS self-test.

Was DTC U3003:16 or U3003:17 recorded?

Yes For DTC U3003:16, GO to Pinpoint Test A
For DTC U3003:17, GO to Pinpoint Test F
No GO to I4


I4   CHECK FOR DIAGNOSTIC TROUBLE CODES (DTCS) IN THE GWM (GATEWAY MODULE A)
  • Using a diagnostic scan tool, carry out the GWM self-test.

Are any Diagnostic Trouble Codes (DTCs) present in the GWM ?

Yes GO to the DTC Chart: GWM .
REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).
No GO to I5


I5   CHECK FOR DIAGNOSTIC TROUBLE CODES (DTCS) IN THE PCM (POWERTRAIN CONTROL MODULE)
  • Using a diagnostic scan tool, carry out the PCM KOEO self-test.

Is DTC P0562 or P0563 present?

Yes
REFER to: Charging System (414-00 Charging System - General Information, Diagnosis and Testing).
No GO to I6


I6   CHECK FOR DTC (DIAGNOSTIC TROUBLE CODE) U0100:00 SET IN OTHER MODULES
  • Using a diagnostic scan tool, carry out the self-test for all modules.
  • Retrieve the Continuous Memory Diagnostic Trouble Codes (CMDTCs) from all modules.

Is DTC U0100:00 set in 1 or more modules in addition to the ABS module?

Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new PCM .
REFER to: Electronic Engine Controls (303-14B Electronic Engine Controls - 1.6L EcoBoost (132kW/180PS) - Sigma, Diagnosis and Testing).
REFER to: Electronic Engine Controls (303-14C Electronic Engine Controls - 2.0L EcoBoost (184kW/250PS) - MI4, Diagnosis and Testing).
REFER to: Electronic Engine Controls (303-14D Electronic Engine Controls - 2.5L Duratec (125kW/170PS), Diagnosis and Testing).
No CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new ABS module and HCU assembly.
REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).



Steering Wheel Position Sensor Signal Failure DTCs

The PSCM monitors steering wheel rotation speed, angle and direction of rotation and sends the information to the ABS module over the HS-CAN 2. A failure of the HS-CAN 2, PSCM or the internal sensors causes the ABS to set one or more Diagnostic Trouble Codes (DTCs).



  DTC Fault Trigger Conditions


DTC Description Fault Trigger Conditions
C0051:28 Steering Wheel Position Sensor: Signal Bias Level Out of Range / Zero Adjustment Failure This DTC sets in continuous memory and on-demand if the absolute value of the measured steering wheel position is greater than 720 degrees or if the calculated steering angle offset is greater than 15 degrees.
C0051:62 Steering Wheel Position Sensor: Signal Compare Failure This DTC sets in continuous memory and on-demand if the difference between the steering wheel angle signal and the calculated reference signal is too high.
C0051:64 Steering Wheel Position Sensor: Signal Plausibility Failure This DTC sets in continuous memory and on-demand if the difference between the steering wheel angle signal and the calculated reference signal is too high or if the steering wheel angle sensor does not match other stability control sensor inputs (yaw rate, lateral acceleration, longitudinal acceleration, roll rate).
C0051:67 Steering Wheel Position Sensor: Signal Incorrect After Event This DTC sets in continuous memory and on-demand if the center position of the steering wheel cannot be determined after 30 seconds of driving at a speed between 12 km/h (7 mph) and 50 km/h (31 mph).
C0051:85 Steering Wheel Position Sensor: Signal Above Allowable Range This DTC sets in continuous memory and on-demand if the absolute value of the calculated steering wheel angle is greater than a predetermined threshold.


Possible Causes


PINPOINT TEST J : STEERING WHEEL POSITION SENSOR SIGNAL FAILURE DTCS
J1   CHECK THE WHEELS AND TIRES
  • Inspect the wheels and tires for any damage or excessive wear.
  • Verify all wheels and tires are the same size and match the size indicated on the VC label.
  • Verify the inflation pressure of all 4 tires is correct as indicated on the VC label.

Are the wheels and tires OK?

Yes GO to J2
No INSTALL the correct size wheel or tire as necessary.
ADJUST tire pressure as necessary.


J2   CHECK THE FRONT SUSPENSION AND STEERING COMPONENTS
  • Inspect the front suspension and steering components for any obvious signs of damage or missing components.

Are the front suspension and steering components OK?

Yes GO to J3
No REPAIR or INSTALL new components as necessary.


J3   CHECK FOR PSCM (POWER STEERING CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Ignition ON.
  • Using a diagnostic scan tool, carry out the PSCM self-test.

Are there any Diagnostic Trouble Codes (DTCs) present in the PSCM ?

Yes DIAGNOSE all PSCM Diagnostic Trouble Codes (DTCs) before diagnosing any ABS C0051:xx codes. GO to the DTC Chart: PSCM .
REFER to: Power Steering (211-02 Power Steering, Diagnosis and Testing).
No GO to J4


J4   CHECK FOR ABS (ANTI-LOCK BRAKE SYSTEM) MODULE DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using a diagnostic scan tool, carry out the ABS module self-test.
  • Retrieve and record all ABS module Diagnostic Trouble Codes (DTCs).

Are any of the following Diagnostic Trouble Codes (DTCs) present in the ABS module; wheel speed sensor, stability control sensor, lost communication with the PSCM or invalid data received from the PSCM ?

Yes DIAGNOSE those Diagnostic Trouble Codes (DTCs) before diagnosing any C0051:xx codes, beginning with any lost communication or invalid data received from the PSCM , followed by any stability control sensor (yaw rate, lateral acceleration, longitudinal acceleration and roll rate) Diagnostic Trouble Codes (DTCs) and finally any wheel speed sensor Diagnostic Trouble Codes (DTCs).
GO to the DTC Chart: Anti-Lock Brake System (ABS) Module.
No GO to J5


J5   VERIFY STABILITY CONTROL SENSOR CALIBRATION
  • Using a diagnostic scan tool, carry out the IVD Initialization routine. Follow the diagnostic scan tool directions.
  • Ignition OFF.
  • Ignition ON.
  • Test drive the vehicle above 12 km/h (7 mph) and make at least 1 left turn and 1 right turn.
  • Using a diagnostic scan tool, carry out the ABS module self-test.

Are any C0051:xx Diagnostic Trouble Codes (DTCs) present?

Yes GO to J6
No The condition that caused the concern is no longer present. The concern was most likely due to an incomplete calibration or a failed calibration of the stability control sensors.


J6   CHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE YAW RATE VALUE (YAW_RATE) PARAMETER IDENTIFICATION (PID)

NOTE: The vehicle must be on level ground and at a complete standstill. Any vehicle movement results in false values for this test.

  • Ignition ON.
  • Using a diagnostic scan tool, monitor the ABS module YAW_RATE Parameter Identification (PID).

Is the YAW_RATE Parameter Identification (PID) value between -0.05 and 0.05?

Yes GO to J7
No GO to J9


J7   CHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE LATERAL ACCELERATION (LAT_ACCL) PARAMETER IDENTIFICATION (PID)

NOTE: The vehicle must be on level ground and at a complete standstill. Any vehicle movement results in false values for this test.

  • Using a diagnostic scan tool, monitor the ABS module LAT_ACCL Parameter Identification (PID).

Is the LAT_ACCL Parameter Identification (PID) value between -0.4 and 0.4?

Yes GO to J8
No GO to J9


J8   CHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE LONGITUDINAL ACCELERATION (LNGACC) PARAMETER IDENTIFICATION (PID)

NOTE: The vehicle must be on level ground and at a complete standstill. Any vehicle movement results in false values for this test.

  • Using a diagnostic scan tool, monitor the ABS module LNGACC Parameter Identification (PID).

Is the LNGACC Parameter Identification (PID) value between -0.4 and 0.4?

Yes GO to J10
No GO to J9


J9   CHECK THE RCM (RESTRAINTS CONTROL MODULE) INSTALLATION AND MOUNTING SURFACE

WARNING: Turn the ignition OFF and wait one minute to deplete the backup power supply. Failure to follow this instruction may result in serious personal injury or death in the event of an accidental deployment.

  • Ignition OFF.
  • Wait one minute then disconnect RCM C310A and C310B.
  • Inspect the RCM installation and make sure the fasteners are fully seated and tightened to specifications.
    REFER to: Restraints Control Module (RCM) (501-20B Supplemental Restraint System, Removal and Installation).
  • Inspect the RCM mounting surface for damage, corrosion or dirt.

Is the RCM installed correctly and is the mounting surface clean and free from damage?

Yes GO to J10
No CLEAN or REPAIR the mounting surface or INSTALL a new RCM as necessary.
REFER to: Restraints Control Module (RCM) (501-20B Supplemental Restraint System, Removal and Installation).


J10   CHECK FOR CORRECT PSCM (POWER STEERING CONTROL MODULE) OPERATION
  • Ignition OFF.
  • Disconnect and inspect PSCM C2368A, C2368C and C2368D (if not previously disconnected).
  • Repair:
    • corrosion (install new connector or terminal - clean module pins)
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
  • Connect PSCM C2368A, C2368C and C2368D. Make sure they seat and latch correctly.
  • Connect RCM C310A and C310B (if previously disconnected). Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?

Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new PSCM .
REFER to: Steering Gear (211-02 Power Steering, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.



Wheel Speed Sensor Electrical Fault DTCs - Front


Refer to Wiring Diagrams Cell 42 for schematic and connector information.

Normal Operation and Fault Conditions

Active wheel speed sensors generate a square wave signal proportional to wheel speed which is sent to the ABS module. Each wheel speed sensor is connected to the ABS module through 2 wires and a connector at each wheel speed sensor. One wire is for sensor voltage supply from the ABS module and the other wire is for the signal return to the ABS module. With the ignition ON, the ABS module carries out a self-test by sending a reference voltage through the wheel speed sensors and their circuitry.



  DTC Fault Trigger Conditions


DTC Description Fault Trigger Conditions
C0031:11 Left Front Wheel Speed Sensor: Circuit Short to Ground These Diagnostic Trouble Codes (DTCs) set in continuous memory and on-demand if there is a short to ground in the sensor signal return circuit or if the sensor has an internal short to ground.
C0034:11 Right Front Wheel Speed Sensor: Circuit Short to Ground
C0031:15 Left Front Wheel Speed Sensor: Circuit Short to Battery or Open These Diagnostic Trouble Codes (DTCs) set in continuous memory and on-demand if there is a short to battery voltage or an open in the sensor signal return circuit. A short to battery voltage may be due to the sensor signal return circuit and the sensor voltage supply circuit shorted together. These Diagnostic Trouble Codes (DTCs) also set if the sensor has an internal short to battery voltage or an open circuit.
C0034:15 Right Front Wheel Speed Sensor: Circuit Short to Battery or Open


Possible Causes

Visual Inspection and Diagnostic Pre-checks


PINPOINT TEST K : WHEEL SPEED SENSOR ELECTRICAL FAULT DTCS - FRONT
K1   CHECK FOR FAULT REPEATABILITY
  • Ignition ON.
  • Using a diagnostic scan tool, clear all ABS module Diagnostic Trouble Codes (DTCs).
  • Ignition OFF.
  • Ignition ON.
  • Test drive the vehicle above and carry out at least 1 ABS stop.
  • Bring the vehicle to a safe stop.
  • Using a diagnostic scan tool, carry out the ABS module self-test.

Is DTC C0031:11, C0031:15, C0034:11 or C0034:15 present?

Yes If the Rotunda Active Wheel Speed Sensor Tester is available, GO to K2
If the Rotunda Active Wheel Speed Sensor Tester is not available and DTC C0031:15 or C0034:15 is present, GO to K5
If the Rotunda Active Wheel Speed Sensor Tester is not available and DTC C0031:11 or C0034:11 is present, GO to K7
No The system is operating correctly at this time. INSPECT both front wheel speed sensor electrical connectors and the ABS module electrical connector. REPAIR or CLEAN the connector as necessary. ADDRESS the root cause of any connector or pin issues.


K2   CHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE OUTPUT USING THE ROTUNDA ACTIVE WHEEL SPEED SENSOR TESTER
  • Ignition OFF.
  • Disconnect the suspect wheel speed sensor electrical connector.
  • Connect the Rotunda Active Wheel Speed Sensor Tester to the wheel speed sensor connectors.
  • Ignition ON.
  • Select the correct system polarity on the Rotunda Active Wheel Speed Sensor Tester and turn the power switch to the ON position.

Is the tester output LED illuminated?

Yes GO to K3
No GO to K5


K3   CHECK THE WHEEL SPEED SENSOR FOR A SHORT TO VOLTAGE WITH THE ROTUNDA ACTIVE WHEEL SPEED SENSOR TESTER
  • Observe the current overload LED on the Rotunda Active Wheel Speed Sensor Tester.

Is the current overload LED illuminated?

Yes REPAIR the suspect wheel speed sensor circuit for a short to voltage.
No GO to K4


K4   CHECK THE WHEEL SPEED SENSOR OUTPUT WITH THE ROTUNDA ACTIVE WHEEL SPEED SENSOR TESTER
  • While monitoring the Rotunda Active Wheel Speed Sensor Tester, slowly spin the suspect wheel.

Do the sensor output Light-emitting Diodes (LEDs) illuminate and flash?

Yes The system is operating correctly at this time. INSPECT all wheel speed sensor electrical connectors and the ABS module electrical connectors. REPAIR or CLEAN the connector as necessary. ADDRESS the root cause of any connector or pin issues.
No INSTALL a new wheel speed sensor.
REFER to: Front Wheel Speed Sensor (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).


K5   CHECK THE WHEEL SPEED SENSOR CIRCUITS FOR A SHORT TO BATTERY VOLTAGE
  • Ignition OFF.
  • Disconnect ABS module C135.
  • Disconnect the suspect wheel speed sensor electrical connector.
  • Ignition ON.
  • For the LH front wheel speed sensor, measure:


    Positive Lead Measurement / Action Negative Lead
      C135-9   Ground
      C135-8   Ground


  • For the RH front wheel speed sensor, measure:


    Positive Lead Measurement / Action Negative Lead
      C135-5   Ground
      C135-4   Ground



Is any voltage present?

Yes REPAIR the affected circuit.
No GO to K6


K6   CHECK THE WHEEL SPEED CIRCUITS FOR AN OPEN
  • Ignition OFF.
  • For the LH front wheel speed sensor, measure:


    Positive Lead Measurement / Action Negative Lead
      C135-9   C150-1
      C135-8   C150-2


  • For the RH front wheel speed sensor, measure:


    Positive Lead Measurement / Action Negative Lead
      C135-5   C160-1
      C135-4   C160-2



Are the resistances less than 3 ohms?

Yes GO to K7
No REPAIR the affected circuit.


K7   CHECK FOR SHORTED WHEEL SPEED SENSOR CIRCUITS
  • Ignition OFF.
  • Disconnect ABS module C135 (if not previously disconnected).
  • Disconnect the suspect wheel speed sensor electrical connector (if not previously disconnected).
  • For the LH front wheel speed sensor, measure:


    Positive Lead Measurement / Action Negative Lead
      C150-1   C150-2


  • For the RH front wheel speed sensor, measure:


    Positive Lead Measurement / Action Negative Lead
      C160-1   C160-2



Is the resistance greater 10,000 ohms?

Yes If DTC C0031:11 or C0034:11 is present, GO to K8
If DTC C0031:15 or C0034:15 is present, GO to K9
No REPAIR the affected circuit.


K8   CHECK THE WHEEL SPEED SENSOR CIRCUITS FOR A SHORT TO GROUND
  • For the LH front wheel speed sensor, measure:


    Positive Lead Measurement / Action Negative Lead
      C135-9   Ground
      C135-8   Ground


  • For the RH front wheel speed sensor, measure:


    Positive Lead Measurement / Action Negative Lead
      C135-5   Ground
      C135-4   Ground



Are the resistances greater than 10,000 ohms?

Yes GO to K9
No REPAIR the affected circuit.


K9   CHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE OUTPUT

NOTE: Make sure all test connections are made at the wheel speed sensor before the ignition is set to ON.

NOTE: Use a meter with a min/max feature and/or recording capabilities to obtain accurate measurements. The ABS module disables the voltage output immediately if the wheel speed sensor is not present.

  • Ignition OFF.
  • Connect ABS module C135.
  • Connect the meter to the suspect wheel speed sensor electrical connector, harness side.
  • Set the meter to measure DC voltage.
  • Set the meter range to greater than 15 volts.
  • Enable the min/max or recording feature on the meter.
  • Ignition ON.
  • For the LH front wheel speed sensor, measure:


    Positive Lead Measurement / Action Negative Lead
      C150-1   C150-2


  • For the RH front wheel speed sensor, measure:


    Positive Lead Measurement / Action Negative Lead
      C160-1   C160-2


  • Check the maximum recorded voltage on the meter.

Is the voltage greater 10 volts?

Yes INSTALL a new wheel speed sensor.
REFER to: Front Wheel Speed Sensor (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
No GO to K10


K10   CHECK FOR CORRECT ABS (ANTI-LOCK BRAKE SYSTEM) MODULE OPERATION
  • Ignition OFF.
  • Disconnect and inspect ABS module C135 (if not previously disconnected).
  • Repair:
    • corrosion (install new connector or terminal - clean module pins)
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
  • Connect ABS module C135. Make sure it seats and latches correctly.
  • Connect the suspect wheel speed sensor electrical connector. Make sure it seats and latches correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?

Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new ABS module and HCU assembly.
REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.



Wheel Speed Sensor Electrical Fault DTCs - Rear


Refer to Wiring Diagrams Cell 42 for schematic and connector information.

Normal Operation and Fault Conditions

Active wheel speed sensors generate a square wave signal proportional to wheel speed which is sent to the ABS module. Each wheel speed sensor is connected to the ABS module through 2 wires and a connector at each wheel speed sensor. One wire is for sensor voltage supply from the ABS and the other wire is for the signal return to the ABS . With the ignition ON, the ABS module carries out a self-test by sending a reference voltage through the wheel speed sensors and their circuitry.



  DTC Fault Trigger Conditions


DTC Description Fault Trigger Conditions
C0037:11 Left Rear Wheel Speed Sensor: Circuit Short to Ground These Diagnostic Trouble Codes (DTCs) set in continuous memory and on-demand if there is a short to ground in the sensor signal return circuit or if the sensor has an internal short to ground.
C003A:11 Right Rear Wheel Speed Sensor: Circuit Short to Ground
C0037:15 Left Rear Wheel Speed Sensor: Circuit Short to Battery or Open These Diagnostic Trouble Codes (DTCs) set in continuous memory and on-demand if there is a short to battery voltage or an open in the sensor signal return circuit. A short to battery voltage may be due to the sensor signal return circuit and the sensor voltage supply circuit shorted together. These Diagnostic Trouble Codes (DTCs) also set if the sensor has an internal short to battery voltage or an open circuit.
C003A:15 Right Rear Wheel Speed Sensor: Circuit Short to Battery or Open


Possible Causes

Visual Inspection and Diagnostic Pre-checks


PINPOINT TEST L : WHEEL SPEED SENSOR ELECTRICAL FAULT DTCS - REAR
L1   CHECK FOR FAULT REPEATABILITY
  • Ignition ON.
  • Using a diagnostic scan tool, clear all ABS module Diagnostic Trouble Codes (DTCs).
  • Ignition OFF.
  • Ignition ON.
  • Test drive the vehicle above and carry out at least 1 ABS stop.
  • Bring the vehicle to a safe stop.
  • Using a diagnostic scan tool, carry out the ABS module self-test.

Is DTC C0031:11, C0031:15, C0034:11 or C0034:15 present?

Yes If the Rotunda Active Wheel Speed Sensor Tester is available, GO to L2
If the Rotunda Active Wheel Speed Sensor Tester is not available and DTC C0037:15 or C003A:15 is present, GO to L5
If the Rotunda Active Wheel Speed Sensor Tester is not available and DTC C0037:11 or C003A:11 is present, GO to L7
No The system is operating correctly at this time. INSPECT both rear wheel speed sensor electrical connectors and the ABS module electrical connector. REPAIR or CLEAN the connector as necessary. ADDRESS the root cause of any connector or pin issues.


L2   CHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE OUTPUT USING THE ROTUNDA ACTIVE WHEEL SPEED SENSOR TESTER
  • Ignition OFF.
  • Disconnect the suspect wheel speed sensor electrical connector.
  • Connect the Rotunda Active Wheel Speed Sensor Tester to the wheel speed sensor connectors.
  • Ignition ON.
  • Select the correct system polarity on the Rotunda Active Wheel Speed Sensor Tester and turn the power switch to the ON position.

Is the tester output LED illuminated?

Yes GO to L3
No GO to L5


L3   CHECK THE WHEEL SPEED SENSOR FOR A SHORT TO VOLTAGE WITH THE ROTUNDA ACTIVE WHEEL SPEED SENSOR TESTER
  • Observe the current overload LED on the Rotunda Active Wheel Speed Sensor Tester.

Is the current overload LED illuminated?

Yes REPAIR the suspect wheel speed sensor circuit for a short to voltage.
No GO to L4


L4   CHECK THE WHEEL SPEED SENSOR OUTPUT WITH THE ROTUNDA ACTIVE WHEEL SPEED SENSOR TESTER
  • While monitoring the Rotunda Active Wheel Speed Sensor Tester, slowly spin the suspect wheel.

Do the sensor output Light-emitting Diodes (LEDs) illuminate and flash?

Yes The system is operating correctly at this time. INSPECT all wheel speed sensor electrical connectors and the ABS module electrical connectors. REPAIR or CLEAN the connector as necessary. ADDRESS the root cause of any connector or pin issues.
No INSTALL a new wheel speed sensor.
REFER to: Rear Wheel Speed Sensor (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).


L5   CHECK THE WHEEL SPEED SENSOR CIRCUITS FOR A SHORT TO BATTERY VOLTAGE
  • Ignition OFF.
  • Disconnect ABS module C135.
  • Disconnect the suspect wheel speed sensor electrical connector.
  • Ignition ON.
  • For the LH rear wheel speed sensor, measure:


    Positive Lead Measurement / Action Negative Lead
      C135-6   Ground
      C135-7   Ground


  • For the RH rear wheel speed sensor, measure:


    Positive Lead Measurement / Action Negative Lead
      C135-10   Ground
      C135-11   Ground



Is any voltage present?

Yes REPAIR the affected circuit.
No GO to L6


L6   CHECK THE WHEEL SPEED CIRCUITS FOR AN OPEN
  • Ignition OFF.
  • For the LH rear wheel speed sensor, measure:


    Positive Lead Measurement / Action Negative Lead
      C135-6   C440-2
      C135-7   C440-1


  • For the RH rear wheel speed sensor, measure:


    Positive Lead Measurement / Action Negative Lead
      C135-10   C426-2
      C135-11   C426-1



Are the resistances less than 3 ohms?

Yes GO to L7
No REPAIR the affected circuit.


L7   CHECK FOR SHORTED WHEEL SPEED SENSOR CIRCUITS
  • Ignition OFF.
  • Disconnect ABS module C135 (if not previously disconnected)
  • Disconnect the suspect wheel speed sensor electrical connector (if not previously disconnected).
  • For the LH rear wheel speed sensor, measure:


    Positive Lead Measurement / Action Negative Lead
      C440-1   C440-2


  • For the RH rear wheel speed sensor, measure:


    Positive Lead Measurement / Action Negative Lead
      C426-1   C426-2



Is the resistance greater 10,000 ohms?

Yes If DTC C0037:11 or C003A:11 are present, GO to L8
If DTC C0037:15 or C003A:15 are present, GO to L9
No REPAIR the affected circuit.


L8   CHECK THE WHEEL SPEED SENSOR CIRCUITS FOR A SHORT TO GROUND
  • For the LH rear wheel speed sensor, measure:


    Positive Lead Measurement / Action Negative Lead
      C135-6   Ground
      C135-7   Ground


  • For the RH rear wheel speed sensor, measure:


    Positive Lead Measurement / Action Negative Lead
      C135-10   Ground
      C135-11   Ground



Are the resistances greater than 10,000 ohms?

Yes GO to L9
No REPAIR the affected circuit.


L9   CHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE OUTPUT

NOTE: Make sure all test connections are made at the wheel speed sensor before the ignition is set to ON.

NOTE: Use a meter with a min/max feature and/or recording capabilities to obtain accurate measurements. The ABS module disables the voltage output immediately if the wheel speed sensor is not present.

  • Ignition OFF.
  • Connect ABS module C135.
  • Connect the meter to the suspect wheel speed sensor electrical connector, harness side.
  • Set the meter to measure DC voltage.
  • Set the meter range to greater than 15 volts.
  • Enable the min/max or recording feature on the meter.
  • Ignition ON.
  • For the LH rear wheel speed sensor, measure:


    Positive Lead Measurement / Action Negative Lead
      C440-1   C440-2


  • For the RH rear wheel speed sensor, measure:


    Positive Lead Measurement / Action Negative Lead
      C426-1   C426-2


  • Check the maximum recorded voltage on the meter.

Is the voltage greater 10 volts?

Yes INSTALL a new wheel speed sensor.
REFER to: Rear Wheel Speed Sensor (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
No GO to L10


L10   CHECK FOR CORRECT ABS (ANTI-LOCK BRAKE SYSTEM) MODULE OPERATION
  • Ignition OFF.
  • Disconnect and inspect ABS module C135 (if not previously disconnected).
  • Repair:
    • corrosion (install new connector or terminal - clean module pins)
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
  • Connect ABS module C135. Make sure it seats and latches correctly.
  • Connect the suspect wheel speed sensor electrical connector. Make sure it seats and latches correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?

Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new ABS module and HCU assembly.
REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.



C0047:01, C0047:1B, C0047:26, C0047:27, C0047:62


Refer to Wiring Diagrams Cell 42 for schematic and connector information.

Normal Operation and Fault Conditions

The brake booster vacuum pressure sensor receives a sensor supply voltage of 5 volts from the ABS module. The sensor is also grounded through the ABS module. The sensor uses the pressure differential between the atmosphere and the brake booster vacuum chamber to produce a return voltage signal to the ABS module between 0.2 volt and 4.9 volts. The ABS module uses other sensor inputs such as wheel speed, brake pedal and stability sensors to determine if the vehicle is stopping and at what rate of deceleration. This information is compared against the vacuum pressure sensor to determine the validity of the sensor signal and the working condition of the sensor itself.



  DTC Fault Trigger Conditions


DTC Description Fault Trigger Conditions
C0047:01 Brake Booster Pressure Sensor: General Electrical Failure This DTC sets when the signal returned by the sensor is above or below a predetermined limit. This is usually caused by a short to voltage, an open or an internal failure of the sensor.
C0047:1B Brake Booster Pressure Sensor: Circuit Resistance Above Threshold The ABS module monitors resistance in the sensor circuits. If the ABS module detects higher resistance than expected 3 times, a failure counter is increased by 1. If the failure counter reaches 10, this DTC is set. This is usually caused by higher than normal resistance in the circuits or an internal failure of the sensor.
C0047:26 Brake Booster Pressure Sensor: Signal Rate of Change Below Threshold This DTC sets when the rate of change in the signal transmitted by the vacuum sensor does not match a predetermined threshold depending on the brake system pressure, or if a characteristic oscillation in the vacuum signal is not detected. A signal failure is reported when 3 valid braking cycles, within the same ignition cycle, have met the above criteria. This is usually caused by a failure in the sensor circuits, a vacuum leak in the brake booster, a mechanical failure of the brake booster or an internal failure of the vacuum sensor.
C0047:27 Brake Booster Pressure Sensor: Signal Rate of Change Above Threshold This DTC sets when the rate of change in the signal transmitted by the vacuum sensor increases beyond a predetermined level when the brakes are not being applied. When this condition is detected, the ABS module starts a counter and monitors the rate of change, if the rate of change increases beyond the limit 3 times during this time period, this DTC sets. This is usually caused by a failure in the sensor circuits or an internal failure of the sensor.
C0047:62 Brake Booster Pressure Sensor: Signal Compare Failure When the brake booster is recovering from a low temperature or low performance mode, the ABS module sends a test pulse to the brake booster solenoid. This test pulse actuates the brake booster, causing the vacuum sensor to vary the signal sent back to the ABS module. If the signal sent is less than 3.4 A, this DTC sets. This is usually caused by a failure in the sensor circuits, high resistance in the sensor connector, an internal failure of the sensor or an internal failure of the ABS module.


Possible Causes

Visual Inspection and Diagnostic Pre-checks


PINPOINT TEST M : C0047:01, C0047:1B, C0047:26, C0047:27, C0047:62
M1   VERIFY ALL WIRING CONNECTIONS
  • Ignition OFF.
  • Disconnect ABS module C135.
  • Disconnect brake booster vacuum sensor C149.
  • Using a good light source, inspect each connector terminal for any corrosion.
  • Inspect both connectors for any pushed-out pins.
    Refer to Wiring Diagrams Cell 5 for schematic and connector information.
  • Using a suitable mating terminal, check each female terminal for deformed or enlarged contacts by comparing the mating terminal's fit between each of the following pins:
    • C135-36
    • C135-44
    • C135-45
    • C1603-1
    • C1603-2
    • C1603-3

Are both connectors free of corrosion, pushed-out pins and deformed or enlarged contacts?

Yes GO to M2
No REPAIR the affected terminal.


M2   CHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE DIAGNOSTIC TROUBLE CODES (DTCS)
  • Connect ABS module C135.
  • Connect brake booster vacuum sensor C149.
  • Ignition ON.
  • Using a diagnostic scan tool, carry out the ABS module self-test.

Is DTC C0047:26 present?

Yes GO to M3
No For C0047:01, C0047:1B, C0047:27 and C0047:62, GO to M4
For all other ABS module codes, GO to the DTC Chart: Anti-Lock Brake System (ABS) Module.


M3   CHECK THE BRAKE BOOSTER AND VACUUM HOSES FOR LEAKS
  • Inspect the vacuum hoses, brake booster and brake booster seals for leaks or evidence of leaks.

Are any leaks or evidence of leaks found?

Yes REPAIR or INSTALL new components as necessary.
No GO to M4


M4   CHECK THE VACUUM SENSOR WIRING FOR A SHORT TO VOLTAGE
  • Ignition OFF.
  • Disconnect ABS module C135.
  • Disconnect brake booster vacuum sensor C149.
  • Ignition ON.
  • Measure:


    Positive Lead Measurement / Action Negative Lead
      C135-36   Ground
      C135-44   Ground
      C135-45   Ground



Is any voltage present?

Yes REPAIR the affected circuit.
No GO to M5


M5   CHECK THE VACUUM SENSOR WIRING FOR A SHORT TO GROUND
  • Ignition OFF.
  • Measure:


    Positive Lead Measurement / Action Negative Lead
      C135-36   Ground
      C135-44   Ground
      C135-45   Ground



Are the resistances greater than 10,000 ohms?

Yes GO to M6
No REPAIR the affected circuit.


M6   CHECK THE VACUUM SENSOR WIRING FOR AN OPEN
  • Measure:


    Positive Lead Measurement / Action Negative Lead
      C135-36   C149-1
      C135-44   C149-3
      C135-45   C149-2



Are the resistances less than 3 ohms?

Yes GO to M7
No REPAIR the affected circuit.


M7   CHECK THE VACUUM SENSOR WIRING FOR A SHORT TOGETHER
  • Measure:


    Positive Lead Measurement / Action Negative Lead
      C149-1   C149-2
      C149-1   C149-3
      C149-2   C149-3



Are the resistances greater than 10,000 ohms?

Yes GO to M8
No REPAIR the affected circuit.


M8   CHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE OUTPUT
  • Connect ABS module C135.
  • Ignition ON.
  • Measure:


    Positive Lead Measurement / Action Negative Lead
      C149-3   Ground



Is the approximately 4.7 volts?

Yes INSTALL a new brake booster.
REFER to: Brake Booster (206-07 Power Brake Actuation, Removal and Installation).
No GO to M9


M9   CHECK FOR CORRECT ABS (ANTI-LOCK BRAKE SYSTEM) MODULE OPERATION
  • Ignition OFF.
  • Disconnect and inspect ABS module C135.
  • Repair:
    • corrosion (install new connector or terminal - clean module pins)
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
  • Connect ABS module C135. Make sure it seats and latches correctly.
  • Connect brake booster vacuum sensor C149.
  • Operate the system and determine if the concern is still present. Make sure it seats and latches correctly.

Is the concern still present?

Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new ABS module and HCU assembly.
REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.



U3002:62


Refer to Wiring Diagrams Cell 42 for schematic and connector information.

Normal Operation and Fault Conditions

When the ignition is in RUN, the ABS module and the PCM share VIN information through the GWM over the HS-CAN 1 and HS-CAN 2.



  DTC Fault Trigger Conditions


DTC Description Fault Trigger Conditions
U3002:62 Vehicle Identification Number: Signal Compare Failure This DTC indicates the VIN message sent by the PCM over the HS-CAN does not match the VIN stored in the ABS module.


Possible Causes


PINPOINT TEST N : U3002:62
N1   VERIFY THE PCM (POWERTRAIN CONTROL MODULE) VIN (VEHICLE IDENTIFICATION NUMBER)
  • Ignition ON.
  • Using a diagnostic scan tool, compare the VIN in the PCM to the VIN plate on the vehicle.

Does the VIN in the PCM match the VIN plate?

Yes GO to N2
No RECONFIGURE the PCM . FOLLOW the instructions on the diagnostic scan tool.


N2   VERIFY THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE PART NUMBER
  • Using a diagnostic scan tool, retrieve and record the ABS module part number.
  • Compare the part number retrieved to the part number in the parts catalog or equivalent.

Is the correct ABS module installed in the vehicle?

Yes CONFIGURE the ABS module.
REFER to: Module Configuration - System Operation and Component Description (418-01 Module Configuration, Description and Operation).
No INSTALL a new ABS module and HCU assembly.
REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).



C006B:00


Refer to Wiring Diagrams Cell 42 for schematic and connector information.

Normal Operation and Fault Conditions

The ABS module uses information from the wheel speed sensors, RCM and PSCM to determine when an Electronic Stability Control (ESC) intervention is necessary to help stabilize the vehicle. The ABS module uses the HCU to modulate the brake fluid pressure to the brake calipers and continues to monitor the sensor and module input until the instability event has been corrected. Once the sensors and modules indicate the instability event has been corrected, the ABS module deactivates the HCU . Underinflated tires, wheels and tires that do not match VC label specifications, suspension and steering damage, and one or more sensor failures contribute to the ABS module setting this DTC .



  DTC Fault Trigger Conditions


DTC Description Fault Trigger Conditions
C006B:00 Stability System Active Too Long: No Sub Type Information This DTC indicates the Electronic Stability Control (ESC) function has been active for longer than the various sensors indicate is necessary.


Possible Causes


PINPOINT TEST O : C006B:00
O1   VERIFY ABS (ANTI-LOCK BRAKE SYSTEM) MODULE DIAGNOSTIC TROUBLE CODES (DTCS)
  • Ignition ON.
  • Using a diagnostic scan tool, carry out the ABS module self-test.

Is DTC C006B:00 the only DTC present in the ABS module?

Yes GO to O2
No DIAGNOSE all other ABS module Diagnostic Trouble Codes (DTCs) before diagnosing DTC C006B:00. GO to the DTC Chart: Anti-Lock Brake System (ABS) Module.


O2   VERIFY THE TIRE PRESSURE
  • Verify all tire inflation pressures are correct as indicated on the VC label.

Are the tires inflated to the correct pressure as indicated on the VC label?

Yes GO to O3
No ADJUST the tire pressure as necessary.


O3   VERIFY WHEEL AND TIRE SIZE
  • Verify all the tires and wheels are the same size and the size is correct as indicated on the VC label.

Are all 4 wheels and tires the correct size as indicated on the VC label?

Yes GO to O4
No INSTALL new wheels or tires as necessary.
REFER to: Wheel and Tire (204-04A Wheels and Tires, Removal and Installation).


O4   VERIFY SUSPENSION AND STEERING ALIGNMENT
  • Verify the suspension and steering alignment is correct.
    REFER to: Suspension System (204-00 Suspension System - General Information, Diagnosis and Testing).

Are the suspension and steering alignment correct?

Yes GO to O5
No CORRECT the suspension or steering alignment.
REFER to: Suspension System (204-00 Suspension System - General Information, Diagnosis and Testing).


O5   CHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE YAW RATE (YAW_RATE_C) PARAMETER IDENTIFICATION (PID)

NOTE: The vehicle must be on level ground and at a complete standstill. Any vehicle movement results in false values for this test.

  • Using a diagnostic scan tool, monitor the YAW_RATE_C Parameter Identification (PID)

Is the YAW_RATE_C Parameter Identification (PID) value between -0.05 and 0.05?

Yes GO to O6
No GO to O9


O6   CHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE LATERAL ACCELEROMETER (LAT_ACCL) PARAMETER IDENTIFICATION (PID)

NOTE: The vehicle must be on level ground and at a complete standstill. Any vehicle movement results in false values for this test.

  • Monitor the LAT_ACCL Parameter Identification (PID)

Is the LAT_ACCL Parameter Identification (PID) value between -0.4 and 0.4?

Yes GO to O7
No GO to O9


O7   CHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE LONGITUDINAL ACCELEROMETER SENSOR INPUT (LONG_ACCL) PARAMETER IDENTIFICATION (PID)
  • Monitor the LONG_ACCL Parameter Identification (PID)

Is the LONG_ACCL Parameter Identification (PID) value between -0.4 and 0.4?

Yes GO to O8
No GO to O9


O8   CHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE STEERING WHEEL ANGLE SENSOR (STEER_ANGL) PARAMETER IDENTIFICATION (PID)
  • Monitor the STEER_ANGL Parameter Identification (PID) while slowing rotating the steering wheel one complete revolution to the left and then one complete revolution to the right.

Does the Parameter Identification (PID) change in intervals of 4.5 degrees and show a 360-degree increase for each complete revolution of the steering wheel?

Yes GO to O9
No GO to Pinpoint Test J


O9   CHECK THE RCM (RESTRAINTS CONTROL MODULE) INSTALLATION AND MOUNTING SURFACE

WARNING: Turn the ignition OFF and wait one minute to deplete the backup power supply. Failure to follow this instruction may result in serious personal injury or death in the event of an accidental deployment.

  • Ignition OFF.
  • Wait one minute then disconnect RCM C310A and C310B.
  • Inspect the RCM installation and verify all fasteners are tighten to specifications.
  • Inspect the RCM mounting surface for damage, corrosion, dirt and other irregularities.

Is the RCM installed correctly and the mounting surface clean and free from damage?

Yes INSTALL a new RCM .
REFER to: Restraints Control Module (RCM) (501-20B Supplemental Restraint System, Removal and Installation).
No CLEAR or REPAIR the RCM mounting surface as necessary. TIGHTEN the fasteners to the correct toque specification.


O10   CHECK FOR CORRECT ABS (ANTI-LOCK BRAKE SYSTEM) MODULE OPERATION
  • Ignition OFF.
  • Disconnect and inspect ABS module C135.
  • Repair:
    • corrosion (install new connector or terminal - clean module pins)
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
  • Connect ABS module C135. Make sure it seats and latches correctly.
  • Connect RCM C310A and C310B. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?

Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new ABS module and HCU assembly.
REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.



U0104:00


Refer to Wiring Diagrams Cell 42 for schematic and connector information.

Normal Operation and Fault Conditions

With the ignition ON, the CCM sends messages to the ABS module over the HS-CAN 2. If the ABS module does not receive these messages within a certain time frame, the ABS module sets a DTC . For information on the messages sent to the ABS module by the CCM , refer to the Network Message Chart.
REFER to: Anti-Lock Brake System (ABS) and Stability Control - Vehicles Built Up To: 03-June-2013 - System Operation and Component Description (206-09 Anti-Lock Brake System (ABS) and Stability Control, Description and Operation).



  DTC Fault Trigger Conditions


DTC Description Fault Trigger Conditions
U0104:00 Lost Communication With Cruise Control Module: No Sub Type Information This DTC sets in continuous memory and on-demand in the ABS module if any one of the following messages is missing from the CCM ; collision mitigation by braking deceleration, collision mitigation by braking precharge, adaptive cruise control deceleration or adaptive cruise control precharge.


Possible Causes


PINPOINT TEST P : U0104:00
P1   CHECK THE COMMUNICATION NETWORK
  • Ignition ON.
  • Using a diagnostic scan tool, carry out the Network Test.

Does the CCM pass the Network Test?

Yes GO to P2
No DIAGNOSE the no communication with the CCM concern.
REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).


P2   RECHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using a diagnostic scan tool, carry out the ABS module self-test.
  • Clear the ABS module Diagnostic Trouble Codes (DTCs).
  • Ignition OFF.
  • Ignition ON.
  • Using a diagnostic scan tool, carry out the ABS module self-test.
  • Record the ABS module Diagnostic Trouble Codes (DTCs).

Is DTC U0104:00 retrieved again?

Yes GO to P3
No The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.


P3   REVIEW THE RECORDED ABS (ANTI-LOCK BRAKE SYSTEM) MODULE DIAGNOSTIC TROUBLE CODES (DTCS)
  • Review the previously recorded ABS module Diagnostic Trouble Codes (DTCs).

Was DTC U3003:16 or U3003:17 recorded?

Yes For DTC U3003:16, GO to Pinpoint Test A
For DTC U3003:17, GO to Pinpoint Test F
No GO to P4


P4   CHECK THE CCM (CRUISE CONTROL MODULE) FOR DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using a diagnostic scan tool, carry out the CCM self-test.

Are any battery voltage Diagnostic Trouble Codes (DTCs) present?

Yes
REFER to: Cruise Control (419-03A Cruise Control, Diagnosis and Testing).
No GO to P5


P5   CHECK FOR DTC (DIAGNOSTIC TROUBLE CODE) U0104:00 SET IN OTHER MODULES
  • Using a diagnostic scan tool, carry out the self-test for all modules.
  • Retrieve and record all Continuous Memory Diagnostic Trouble Codes (CMDTCs).

Is DTC U0104:00 set in 1 or more modules in addition to the ABS module?

Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new CCM .
REFER to: Cruise Control Module (CCM) (419-03A Cruise Control, Removal and Installation).
No CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new ABS module and HCU assembly.
REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).



U0131:00


Refer to Wiring Diagrams Cell 42 for schematic and connector information.

Normal Operation and Fault Conditions

With the ignition ON, the PSCM sends messages to the ABS module over the HS-CAN 2. If the ABS module does not receive these messages within a certain time frame, the ABS module sets a DTC . For information on the messages sent to the ABS module by the PSCM , refer to the Network Message Chart.
REFER to: Anti-Lock Brake System (ABS) and Stability Control - Vehicles Built Up To: 03-June-2013 - System Operation and Component Description (206-09 Anti-Lock Brake System (ABS) and Stability Control, Description and Operation).



  DTC Fault Trigger Conditions


DTC Description Fault Trigger Conditions
U0131:00 Lost Communication With Power Steering Control Module: No Sub Type Information This DTC sets in continuous memory and on-demand in the ABS module if any of the steering wheel data messages is missing from the PSCM .


Possible Causes


PINPOINT TEST Q : U0131:00
Q1   CHECK THE COMMUNICATION NETWORK
  • Ignition ON.
  • Using a diagnostic scan tool, carry out the Network Test.

Does the PSCM pass the Network Test?

Yes GO to Q2
No DIAGNOSE the no communication with the PSCM concern.
REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).


Q2   RECHECK THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using a diagnostic scan tool, carry out the ABS module self-test.
  • Clear the ABS module Diagnostic Trouble Codes (DTCs).
  • Ignition OFF.
  • Ignition ON.
  • Using a diagnostic scan tool, carry out the ABS module self-test.
  • Record the ABS module Diagnostic Trouble Codes (DTCs).

Is DTC U0131:00 retrieved again?

Yes GO to Q3
No The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.


Q3   REVIEW THE RECORDED ABS (ANTI-LOCK BRAKE SYSTEM) MODULE DIAGNOSTIC TROUBLE CODES (DTCS)
  • Review the previously recorded ABS module Diagnostic Trouble Codes (DTCs).

Was DTC U3003:16 or U3003:17 recorded?

Yes For DTC U3003:16, GO to Pinpoint Test A
For DTC U3003:17, GO to Pinpoint Test F
No GO to Q4


Q4   CHECK THE PSCM (POWER STEERING CONTROL MODULE) FOR DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using a diagnostic scan tool, carry out the PSCM self-test.

Are any battery voltage Diagnostic Trouble Codes (DTCs) present in the PSCM ?

Yes
REFER to: Power Steering (211-02 Power Steering, Diagnosis and Testing).
No GO to Q5


Q5   CHECK FOR DTC (DIAGNOSTIC TROUBLE CODE) U0131:00 SET IN OTHER MODULES
  • Using a diagnostic scan tool, carry out the self-test for all modules.
  • Retrieve and record all Continuous Memory Diagnostic Trouble Codes (CMDTCs).

Is DTC U0131:00 set in 1 or more modules in addition to the ABS module?

Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new PSCM .
REFER to: Steering Gear (211-02 Power Steering, Removal and Installation).
No CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new ABS module and HCU assembly.
REFER to: Hydraulic Control Unit (HCU) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).



C1015:7A, C1015:7B


Refer to Wiring Diagrams Cell 42 for schematic and connector information.

Normal Operation and Fault Conditions

The ABS module uses the brake booster vacuum sensor to monitor the brake booster vacuum. A gear driven vacuum pump supplies the necessary vacuum to the brake booster. The vacuum pump is expected to produce at least 600 mBar (18 In-Hg). A leak in a vacuum hose, brake booster or one of the seals on the brake booster or vacuum pump prevents the vacuum pump from achieving the required amount of vacuum. Damage or and internal failure prevents the vacuum pump from operating at peak capacity.



  DTC Fault Trigger Conditions


DTC Description Fault Trigger Conditions
C1015:7A Vacuum Supply: Fluid Leak or Seal Failure This DTC sets when the ABS module detects a decrease in brake booster vacuum without brake system activation.
C1015:7B Vacuum Supply: Low Fluid Level This DTC sets when the brake vacuum pump or engine is unable to produce the vacuum necessary for brake system operation.


Possible Causes


PINPOINT TEST R : C1015:7A, C1015:7B
R1   CHECK FOR VACUUM LEAKS
  • Start the engine.
  • Inspect the vacuum hose and each hose connection from the vacuum pump to the brake booster for leaks.

Are any vacuum leaks found?

Yes REPAIR the vacuum leak or INSTALL new components as necessary.
No If the vehicle is equipped with a 1.6L EcoBoost engine or a 2.0L EcoBoost engine, GO to R2
If the vehicle is equipped with a 2.5L Duratec engine, INSTALL a new brake booster.
REFER to: Brake Booster (206-07 Power Brake Actuation, Removal and Installation).


R2   CHECK THE VACUUM PUMP OUTPUT
  • Ignition OFF.
  • Disconnect the vacuum hose from the brake booster.
  • Connect a vacuum gauge to the vacuum hose.
  • Start the engine.
  • Monitor the vacuum gauge.

Does the vacuum gauge display greater than 600 mBar (18 In-Hg)?

Yes INSTALL a new brake booster.
REFER to: Brake Booster (206-07 Power Brake Actuation, Removal and Installation).
No INSTALL a new vacuum pump.
REFER to: Brake Vacuum Pump - 1.6L EcoBoost (132kW/180PS) - Sigma (206-07 Power Brake Actuation, Removal and Installation).
REFER to: Brake Vacuum Pump - 2.0L EcoBoost (184kW/250PS) - MI4 (206-07 Power Brake Actuation, Removal and Installation).





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