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Lincoln Corsair: Anti-Lock Brake System (ABS) and Stability Control / Diagnosis and Testing - Anti-Lock Brake System (ABS) and Stability Control

Lincoln Corsair 2020-2022 Service Manual / Chassis / Brake System / Anti-Lock Brake System (ABS) and Stability Control / Diagnosis and Testing - Anti-Lock Brake System (ABS) and Stability Control

Diagnostic Trouble Code (DTC) Chart

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).


Module DTC Description Action
ABS C0020:11 ABS Pump Motor Control: Circuit Short To Ground GO to Pinpoint Test H
ABS C0020:12 ABS Pump Motor Control: Circuit Short To Battery GO to Pinpoint Test H
ABS C0020:13 ABS Pump Motor Control: Circuit Open GO to Pinpoint Test H
ABS C0020:49 ABS Pump Motor Control: Internal Electronic Failure GO to Pinpoint Test H
ABS C0020:71 ABS Pump Motor Control: Actuator Stuck GO to Pinpoint Test H
ABS C0030:07 Left Front Tone Wheel: Mechanical Failures GO to Pinpoint Test AB
ABS C0031:01 Left Front Wheel Speed Sensor: General Electrical Failure GO to Pinpoint Test M
ABS C0031:07 Left Front Wheel Speed Sensor: Mechanical Failures GO to Pinpoint Test AB
ABS C0031:2F Left Front Wheel Speed Sensor: Signal Erratic GO to Pinpoint Test AB
ABS C0031:4A Left Front Wheel Speed Sensor: Incorrect Component Installed GO to Pinpoint Test AL
ABS C0031:64 Left Front Wheel Speed Sensor: Signal Plausibility Failure GO to Pinpoint Test AB
ABS C0033:07 Right Front Tone Wheel: Mechanical Failures GO to Pinpoint Test AB
ABS C0034:01 Right Front Wheel Speed Sensor: General Electrical Failure GO to Pinpoint Test M
ABS C0034:07 Right Front Wheel Speed Sensor: Mechanical Failures GO to Pinpoint Test AB
ABS C0034:2F Right Front Wheel Speed Sensor: Signal Erratic GO to Pinpoint Test AB
ABS C0034:4A Right Front Wheel Speed Sensor: Incorrect Component Installed GO to Pinpoint Test AL
ABS C0034:64 Right Front Wheel Speed Sensor: Signal Plausibility Failure GO to Pinpoint Test AB
ABS C0036:07 Left Rear Tone Wheel: Mechanical Failures GO to Pinpoint Test AB
ABS C0037:01 Left Rear Wheel Speed Sensor: General Electrical Failure GO to Pinpoint Test N
ABS C0037:07 Left Rear Wheel Speed Sensor: Mechanical Failures GO to Pinpoint Test AB
ABS C0037:2F Left Rear Wheel Speed Sensor: Signal Erratic GO to Pinpoint Test AB
ABS C0037:4A Left Rear Wheel Speed Sensor: Incorrect Component Installed GO to Pinpoint Test AL
ABS C0037:64 Left Rear Wheel Speed Sensor: Signal Plausibility Failure GO to Pinpoint Test AB
ABS C0039:07 Right Rear Tone Wheel: Mechanical Failures GO to Pinpoint Test AB
ABS C003A:01 Right Rear Wheel Speed Sensor: General Electrical Failure GO to Pinpoint Test N
ABS C003A:07 Right Rear Wheel Speed Sensor: Mechanical Failures GO to Pinpoint Test AB
ABS C003A:2F Right Rear Wheel Speed Sensor: Signal Erratic GO to Pinpoint Test AB
ABS C003A:4A Right Rear Wheel Speed Sensor: Incorrect Component Installed GO to Pinpoint Test AL
ABS C003A:64 Right Rear Wheel Speed Sensor: Signal Plausibility Failure GO to Pinpoint Test AB
ABS C0040:64 Brake Pedal Switch 'A': Signal Plausibility Failure GO to Pinpoint Test CO
ABS C0044:49 Brake Pressure Sensor 'A': Internal Electronic Failure GO to Pinpoint Test AM
ABS C0044:51 Brake Pressure Sensor 'A': Not Programmed GO to Pinpoint Test AM
ABS C0044:64 Brake Pressure Sensor 'A': Signal Plausibility Failure GO to Pinpoint Test AM
ABS C0044:8F Brake Pressure Sensor 'A': Erratic GO to Pinpoint Test AM
ABS C0047:1C Brake Booster Pressure Sensor: Circuit Voltage Out Of Range GO to Pinpoint Test CO
ABS C0047:64 Brake Booster Pressure Sensor: Signal Plausibility Failure GO to Pinpoint Test CO
ABS C0049:01 Brake Fluid Level: General Electrical Failure GO to Pinpoint Test I
ABS C0049:7A Brake Fluid Level: Fluid Leak Or Seal Failure GO to Pinpoint Test I
ABS C0049:7B Brake Fluid Level: Low Fluid Level GO to Pinpoint Test I
ABS C0051:64 Steering Wheel Position Sensor: Signal Plausibility Failure GO to Pinpoint Test LA
ABS C0051:67 Steering Wheel Position Sensor: Signal Incorrect After Event GO to Pinpoint Test LA
ABS C0051:85 Steering Wheel Position Sensor: Signal Above Allowable Range GO to Pinpoint Test LA
ABS C0051:86 Steering Wheel Position Sensor: Signal Invalid GO to Pinpoint Test LA
ABS C0061:28 Lateral Acceleration Sensor: Signal Bias Level Out Of Range/Zero Adjustment Failure GO to Pinpoint Test AG
ABS C0061:54 Lateral Acceleration Sensor: Missing Calibration GO to Pinpoint Test AN
ABS C0061:64 Lateral Acceleration Sensor: Signal Plausibility Failure GO to Pinpoint Test AG
ABS C0062:28 Longitudinal Acceleration Sensor: Signal Bias Level Out Of Range/Zero Adjustment Failure GO to Pinpoint Test AG
ABS C0062:54 Longitudinal Acceleration Sensor: Missing Calibration GO to Pinpoint Test AN
ABS C0062:64 Longitudinal Acceleration Sensor: Signal Plausibility Failure GO to Pinpoint Test AG
ABS C0063:28 Yaw Rate Sensor: Signal Bias Level Out Of Range/Zero Adjustment Failure GO to Pinpoint Test AG
ABS C0063:64 Yaw Rate Sensor: Signal Plausibility Failure GO to Pinpoint Test AG
ABS C0064:28 Roll Rate Sensor: Signal Bias Level Out Of Range/Zero Adjustment Failure GO to Pinpoint Test AG
ABS C0064:64 Roll Rate Sensor: Signal Plausibility Failure GO to Pinpoint Test AG
ABS C006A:95 Multi-axis Acceleration Sensor: Incorrect Assembly GO to Pinpoint Test AN
ABS C006B:00 Stability System Active Too Long: No Sub Type Information GO to Pinpoint Test AD
ABS C0078:00 Tire Diameter: No Sub Type Information GO to Pinpoint Test ZA
ABS C052E:A2 ABS Pump Motor Control Circuit Low: System Voltage Low GO to Pinpoint Test H
ABS C0594:12 Brake Booster Motor 'A' Performance: Circuit Short To Battery GO to Pinpoint Test CP
ABS C0594:78 Brake Booster Motor 'A' Performance: Alignment Or Adjustment Incorrect GO to Pinpoint Test CP
ABS C0594:92 Brake Booster Motor 'A' Performance: Performance Or Incorrect Operation GO to Pinpoint Test CP
ABS C0596:00 Brake Booster Motor 'A' Current Sensor Circuit Range/Performance: No Sub Type Information GO to Pinpoint Test CP
ABS C1013:09 Brake System Pressure: Component Failures GO to Pinpoint Test CO
ABS C1013:7A Brake System Pressure: Fluid Leak Or Seal Failure GO to Pinpoint Test CO
ABS C1013:7C Brake System Pressure: Slow Response GO to Pinpoint Test CO
ABS C1013:92 Brake System Pressure: Performance Or Incorrect Operation GO to Pinpoint Test CO
ABS C1018:61 Regenerative Braking: Signal Calculation Failure GO to Pinpoint Test Z
ABS C1019:29 Linear Actuator Control (LAC): Signal Invalid GO to Pinpoint Test CO
ABS C1019:78 Linear Actuator Control (LAC): Alignment Or Adjustment Incorrect GO to Pinpoint Test CO
ABS C1019:92 Linear Actuator Control (LAC): Performance Or Incorrect Operation GO to Pinpoint Test CO
ABS C101F:46 Generic Valve Failure: Calibration/Parameter Memory Failure GO to Pinpoint Test Z
ABS C101F:49 Generic Valve Failure: Internal Electronic Failure GO to Pinpoint Test Z
ABS C1020:00 Brake System Fill Not Complete: No Sub Type Information GO to Pinpoint Test J
ABS C1020:52 Brake System Fill Not Complete: Not Activated GO to Pinpoint Test J
ABS C1109:64 Vehicle Dynamics Control Switch: Signal Plausibility Failure GO to Pinpoint Test O
ABS C1A08:1C Pressure Sensor Supply: Circuit Voltage Out Of Range GO to Pinpoint Test AM
ABS C1B11:71 Pressure Control Valve: Actuator Stuck GO to Pinpoint Test Y
ABS P0562:16 System Voltage Low: Circuit Voltage Below Threshold GO to Pinpoint Test A
ABS P0563:17 System Voltage High: Circuit Voltage Above Threshold GO to Pinpoint Test F
ABS P05D3:86 Driver Mode Select Switch 'A' Range/Performance: Signal Invalid GO to Pinpoint Test OB
ABS P1177:64 Synchronization: Signal Plausibility Failure GO to Pinpoint Test Y
ABS U0100:00 Lost Communication With ECM/PCM 'A': No Sub Type Information GO to Pinpoint Test AI
ABS U0101:00 Lost Communication with TCM: No Sub Type Information GO to Pinpoint Test AI
ABS U0103:00 Lost Communication With Gear Shift Control Module A: No Sub Type Information GO to Pinpoint Test AV
ABS U011D:00 Lost Communication With All Wheel Drive Control Module: No Sub Type Information GO to Pinpoint Test BX
ABS U0122:00 Lost Communication With Vehicle Dynamics Control Module: No Sub Type Information GO to Pinpoint Test BR
ABS U0131:00 Lost Communication With Power Steering Control Module 'A': No Sub Type Information GO to Pinpoint Test AE
ABS U0138:00 Lost Communication with All Terrain Control Module: No Sub Type Information GO to Pinpoint Test BM
ABS U0140:00 Lost Communication With Body Control Module: No Sub Type Information GO to Pinpoint Test D
ABS U0146:00 Lost Communication With Serial Data Gateway 'A': No Sub Type Information GO to Pinpoint Test BP
ABS U0151:00 Lost Communication With Restraints Control Module: No Sub Type Information GO to Pinpoint Test BH
ABS U0155:00 Lost Communication With Instrument Panel Cluster (IPC) Control Module: No Sub Type Information GO to Pinpoint Test AR
ABS U0159:00 Lost Communication With Parking Assist Control Module 'A': No Sub Type Information GO to Pinpoint Test BY
ABS U0232:00 Lost Communication With Side Obstacle Detection Control Module 'A': No Sub Type Information GO to Pinpoint Test BZ
ABS U0233:00 Lost Communication With Side Obstacle Detection Control Module 'B': No Sub Type Information GO to Pinpoint Test BZ
ABS U023A:00 Lost Communication With Image Processing Module A: No Sub Type Information GO to Pinpoint Test BQ
ABS U023B:00 Lost Communication With Image Processing Module B: No Sub Type Information GO to Pinpoint Test CK
ABS U0256:00 Lost Communication With Front Controls Interface Module 'A': No Sub Type Information GO to Pinpoint Test AS
ABS U0293:00 Lost Communication With Hybrid/EV Powertrain Control Module 'A': No Sub Type Information GO to Pinpoint Test CM
ABS U0300:51 Internal Control Module Software Incompatibility: Not Programmed GO to Pinpoint Test Z
ABS U0401:00 Invalid Data Received from ECM/PCM A: No Sub Type Information GO to Pinpoint Test AI
ABS U0401:86 Invalid Data Received from ECM/PCM A: Signal Invalid GO to Pinpoint Test AI
ABS U0402:00 Invalid Data Received from TCM: No Sub Type Information GO to Pinpoint Test AI
ABS U0404:00 Invalid Data Received from Gear Shift Control Module A: No Sub Type Information GO to Pinpoint Test AV
ABS U041E:00 Invalid Data Received From All Wheel Drive Control Module: No Sub Type Information GO to Pinpoint Test BX
ABS U0420:00 Invalid Data Received from Power Steering Control Module 'A': No Sub Type Information GO to Pinpoint Test AE
ABS U0422:00 Invalid Data Received From Body Control Module: No Sub Type Information GO to Pinpoint Test D
ABS U0439:00 Invalid Data Received From All Terrain Control Module: No Sub Type Information GO to Pinpoint Test BM
ABS U0452:00 Invalid Data Received From Restraints Control Module: No Sub Type Information GO to Pinpoint Test BH
ABS U0452:86 Invalid Data Received From Restraints Control Module: Signal Invalid GO to Pinpoint Test BH
ABS U053B:00 Invalid Data Received From Image Processing Module A: No Sub Type Information GO to Pinpoint Test BQ
ABS U0557:86 Invalid Data Received From Front Controls Interface Module 'A': Signal Invalid GO to Pinpoint Test AS
ABS U2001:00 Reduced System Function: No Sub Type Information GO to Pinpoint Test C
ABS U2017:57 Control Module Software #2: Invalid/Incompatible Software Component GO to Pinpoint Test Z
ABS U2017:93 Control Module Software #2: No Operation GO to Pinpoint Test Z
ABS U2018:57 Control Module Software #3: Invalid/Incompatible Software Component GO to Pinpoint Test Z
ABS U2024:51 Control Module Cal-Config Data: Not Programmed GO to Pinpoint Test Z
ABS U2100:00 Initial Configuration Not Complete: No Sub Type Information GO to Pinpoint Test Z
ABS U2101:00 Control Module Configuration Incompatible: No Sub Type Information GO to Pinpoint Test Z
ABS U2107:68 Collision Mitigation By Braking: Event Information GO to Pinpoint Test AQ
ABS U2108:68 Adaptive Cruise Control: Event Information GO to Pinpoint Test AQ
ABS U2200:00 Control Module Configuration Memory Corrupt: No Sub Type Information GO to Pinpoint Test Z
ABS U3000:00 Control Module: No Sub Type Information GO to Pinpoint Test Y
ABS U3000:49 Control Module: Internal Electronic Failure GO to Pinpoint Test Y
ABS U3000:4B Control Module: Over Temperature GO to Pinpoint Test Y
ABS U3000:96 Control Module: Component Internal Failure GO to Pinpoint Test Y
ABS U3002:62 Vehicle Identification Number: Signal Compare Failure GO to Pinpoint Test AF
ABS U3003:16 Battery Voltage: Circuit Voltage Below Threshold GO to Pinpoint Test A
ABS U3003:17 Battery Voltage: Circuit Voltage Above Threshold GO to Pinpoint Test F
ABS U300A:29 Ignition Switch: Signal Invalid GO to Pinpoint Test A
ABS U3012:68 Control Module Improper Wake-up Performance: Event Information GO to Pinpoint Test B
PCM P0556:00 Brake Booster Pressure Sensor Circuit Range/Performance: No Sub Type Information GO to Pinpoint Test CO
PCM P0557:00 Brake Booster Pressure Sensor Circuit Low: No Sub Type Information GO to Pinpoint Test CO
PCM P05FF:00 Brake Pressure Sensor / Brake Pedal Position Sensor Correlation: No Sub Type Information GO to Pinpoint Test CO

Symptom Charts

Symptom Chart: ABS and Stability Control

  • Diagnostics in this manual assume a certain skill and knowledge of Ford-specific diagnostic practices.
    REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).
Condition Actions
The brake warning indicator is always on or never on   GO to Pinpoint Test K
The ABS warning indicator is always on or never on   GO to Pinpoint Test K
The stability-traction control indicator (sliding-car icon) is always on or never on   GO to Pinpoint Test K
ABS false activation, ABS too sensitive, ABS activates on normal stop   GO to Pinpoint Test BF
The traction control system is inoperative, cannot be disabled or enabled   GO to Pinpoint Test E
The auto hold feature is inoperative, cannot be disabled or enabled   GO to Pinpoint Test CH
The hill start assist feature is inoperative   GO to Pinpoint Test L
The selectable drive mode feature is inoperative   GO to Pinpoint Test OB
No power brake assist - EBB system   GO to Pinpoint Test G
Excessive power brake assist - EBB system   GO to Pinpoint Test G
Parking brake fault   GO to Pinpoint Test P

Pinpoint Tests


PINPOINT TEST A: ABS MODULE LOW VOLTAGE CONCERN
Introduction
Refer to Wiring Diagrams Cell 42 for schematic and connector information.

Normal Operation and Fault Conditions

If DTC U0140:00 or U0422:00 is present with U300A:29, diagnose the lost communication DTC first.

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 2 ground circuits. Excessive resistance or an open in one or more of these circuits, a discharged battery or a inoperative charging system results in the ABS module setting a DTC .

REFER to: Anti-Lock Brake System (ABS) and Stability Control - 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 Condition
ABS P0562:16 System Voltage Low: Circuit Voltage Below Threshold Sets when the ABS module detects an under-voltage condition in the vehicle battery and charging system.
ABS U3003:16 Battery Voltage: Circuit Voltage Below Threshold Sets when the ABS module detects the voltage supply falls below 10 volts.
ABS U300A:29 Ignition Switch: Signal Invalid Sets when the ABS module detects the voltage signal from the ignition run/start bus from the BJB does not match the voltage message from the BCM .

Possible Sources

  • Fuse(s)
  • Wiring, terminals or connectors
  • Charging system concern
  • 12-volt Battery
  • EBB unit ( HCU and ABS module assembly)

Visual Inspection and Pre-checks

  • Make sure the vehicle battery terminals and cables are free of any corrosion and other contaminants.
  • Make sure the vehicle battery terminals are tightened to their correct torque specifications.
  • Make sure all EBB and ABS module fuses in the BJB are OK.
PINPOINT TEST B: CONTROL MODULE IMPROPER WAKE-UP PERFORMANCE

Normal Operation and Fault Conditions

This DTC is pre-set in a new ABS module and can only be cleared when the Brake System Service Bleed is successfully carried out. REFER to: Brake System Pressure Bleeding (206-00 Brake System - General Information, General Procedures).

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ABS U3012:68 Control Module Improper Wake-up Performance: Event Information This DTC is pre-set in a new ABS module and can only be cleared when the Brake System Service Bleed is successfully carried out.
REFER to: Brake System Pressure Bleeding (206-00 Brake System - General Information, General Procedures).

Possible Sources

  • Brake System Service Bleed not complete
Diagnostic steps are not provided for this symptom or DTC.  REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).
PINPOINT TEST C: U2001:00

Normal Operation and Fault Conditions

The ABS module incorporates a function for testing the vehicle on a dynamometer to prevent wheel speed sensor Diagnostic Trouble Codes (DTCs) from setting during testing. The PCM sends a message to the ABS module when the vehicle is setup for testing. When the ABS module receives this message it knows to ignore discrepancies between the front and rear wheel speed sensors.

The ABS module exits the test mode automatically when the PCM sends the exit message, the ignition is set to OFF, either of the non-driven wheels exceeds 20 km/h (12 mph) or a wheel speed sensor DTC is detected on any wheel speed sensor.

REFER to: Anti-Lock Brake System (ABS) and Stability Control - 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 Condition
ABS U2001:00 Reduced System Function: No Sub Type Information Sets when the ABS module has been set to dynamometer test mode.

Possible Sources

  • ABS module in test mode

Visual Inspection and Pre-checks

  • Drive the vehicle above 20 km/h (12 mph). Stop and cycle the ignition from ON to OFF and back to ON. Carry out the ABS module self-test. If the DTC returns, retrieve and diagnose all PCM Diagnostic Trouble Codes (DTCs).
Diagnostic steps are not provided for this symptom or DTC.  REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).
PINPOINT TEST D: ABS MODULE COMMUNICATION CONCERN WITH BCM
Introduction

Normal Operation and Fault Conditions

With the ignition ON, the sends messages to the BCM ABS module over the HS-CAN1 through the GWM . If the ABS module does not receive these messages within the allotted time frame or if the messages contain invalid data, the module sets a DTC . This can be due to a BCM failure, a circuit failure on the network or an excessive load on the network. For information on the messages sent to the ABS module by the BCM , REFER to: Anti-Lock Brake System (ABS) and Stability Control - 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 Condition
ABS U0140:00 Lost Communication With Body Control Module: No Sub Type Information This DTC sets when the ABS module does not receive any messages from the BCM within the allowed time.
ABS U0422:00 Invalid Data Received From Body Control Module: No Sub Type Information This DTC sets when the ABS module receives messages from the BCM , but the messages contain invalid data.

Possible Sources

  • Network communication concern
  • GWM
  • BCM
PINPOINT TEST E: THE TRACTION CONTROL SYSTEM IS INOPERATIVE, CANNOT BE DISABLED OR ENABLED
Introduction

NOTE: This test requires the use of at least 2 ignition keys (passive or IKT ) programmed to the vehicle; one admin ignition key and one restricted ignition key.

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 APIM sends a message to the GWM over the HS-CAN3 indicating the driver has requested the traction control to be disabled. The GWM relays this message to the ABS module over the FD-CAN . The ABS module continues to monitor for excessive wheel spin, but no longer takes any action when a traction event is detected.

After receiving the traction control status message from the APIM , the ABS module then sends a message to the GWM over the FD-CAN to illuminate the stability-traction control disabled indicator (sliding car OFF icon). The GWM relays this message to the IPC over the HS-CAN3 . 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 MyKey traction control feature configured to always on, traction control cannot be disabled. An admin key must be used to enable and disable traction control.

Possible Sources

  • A MyKey restricted key is in use
  • Network communication concern
  • APIM concern
PINPOINT TEST F: ABS MODULE HIGH VOLTAGE CONCERN
Introduction
Refer to Wiring Diagrams Cell 42 for schematic and connector information.

Normal Operation and Fault Conditions

The ABS module may set an over-voltage DTC if the vehicle has been recently jump started, the battery has been recently charged or the battery has been discharged. The battery may become discharged due to excessive load(s) on the charging system from aftermarket accessories or if the battery has been left unattended with the accessories on.

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 2 ground circuits.

REFER to: Anti-Lock Brake System (ABS) and Stability Control - 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 Condition
ABS U3003:17 Battery Voltage: Circuit Voltage Above Threshold Sets when the ABS module detects an over-voltage condition in the vehicle battery and charging system.
ABS P0563:17 System Voltage High: Circuit Voltage Above Threshold Sets when the ABS module detects the voltage supply is above 17 volts. This DTC may also set in the ABS module due to battery charging or vehicle jump starting events.

Possible Sources

  • Charging system concern
  • EBB unit ( HCU and ABS module assembly)
PINPOINT TEST G: NO POWER BRAKE ASSIST OR EXCESSIVE POWER BRAKE ASSIST - EBB SYSTEM

Normal Operation and Fault Conditions

The ABS module monitors all base brake, anti-lock brake, traction control and stability control functions and features. If a system error occurs which could cause irreparable damage to the system, the ABS module disables the EBB unit. The base brake system still functions, but there is no brake boost assist. This can also occur if the EBB unit loses power or ground.

System over-voltage combined with other specific circumstances may cause the EBB unit to provide excessive brake assist or a "touchy" pedal, where the brakes apply heavily with a light application of the brake pedal.

In either of these cases, no brake assist or too much brake assist, the ABS module sets Diagnostic Trouble Codes (DTCs) indicating possible concerns.

Possible Sources

  • Diagnostic Trouble Codes (DTCs) preset in the ABS module

Visual Inspection and Pre-checks

  • Retrieve and diagnose all ABS module Diagnostic Trouble Codes (DTCs)
Diagnostic steps are not provided for this symptom or DTC.  REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).
PINPOINT TEST H: HYDRAULIC PUMP FAULTS
Introduction
Refer to Wiring Diagrams Cell 43 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).

REFER to: Anti-Lock Brake System (ABS) and Stability Control - 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 Condition
ABS C0020:11 ABS Pump Motor Control: Circuit Short To Ground The ABS module receives 3 voltage inputs, 1 input is only present with the ignition ON, the other 2 are fused battery voltage. One battery voltage input is for the pump motor and the other is for the hydraulic valves. The ABS module compares these 2 voltage inputs, if the difference between these 2 voltage inputs exceeds a pre-set parameter, this DTC sets.
ABS C0020:12 ABS Pump Motor Control: Circuit Short To Battery Sets when the ABS module detects an over-voltage condition due to an internal failure of the ECU .
ABS C0020:13 ABS Pump Motor Control: Circuit Open Sets when the ABS module detects the current for one of the battery voltage inputs is abnormally low, while the other is high. This is usually due to an open ground circuit.
ABS C0020:49 ABS Pump Motor Control: Internal Electronic Failure Sets if the hydraulic pump motor actual state does not match the commanded state for 30 seconds; pump is running, pump is not running or pump motor relay shorted.
ABS C0020:71 ABS Pump Motor Control: Actuator Stuck Sets when the ABS module detects hydraulic pump motor is not rotating when it is commanded to run.
ABS C052E:A2 ABS Pump Motor Control Circuit Low: System Voltage Low Sets when the ABS module detects an under-voltage condition preventing the operation of the power assisted brakes. This results in high brake pedal effort.

Possible Sources

  • Fuses
  • Wiring, terminals or connectors
  • EBB unit ( HCU and ABS module assembly)

Visual Inspection and Pre-checks

  • Make sure the vehicle battery terminals and cables are free of any corrosion and other contaminants.
  • Make sure the vehicle battery terminals are tightened to their correct torque specifications.
  • Make sure all EBB and ABS module fuses in the BJB are OK.
PINPOINT TEST I: BRAKE FLUID LEVEL FAULTS

Normal Operation and Fault Conditions

The brake fluid level switch is hardwired to the ABS module, the module monitors the switch and brake fluid level. If a circuit fault or fluid loss is detected, a DTC is set.

REFER to: Anti-Lock Brake System (ABS) and Stability Control - 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 Condition
ABS C0049:01 Brake Fluid Level: General Electrical Failure Sets when the ABS module detects a short to ground, voltage or an open circuit in the brake fluid level switch or circuits.
ABS C0049:7A Brake Fluid Level: Fluid Leak Or Seal Failure Sets when the ABS module determines a leak is present in the hydraulic system.
ABS C0049:7B Brake Fluid Level: Low Fluid Level Sets when the ABS module determines the fluid level in the hydraulic system is low.

Possible Sources

  • Wiring, terminals or connectors
  • Leak in the hydraulic system
  • Brake fluid level switch
  • EBB unit
I1 CHECK THE ABS MODULE DIAGNOSTIC TROUBLE CODES (DTCS)
  • Ignition ON.
  • Using a diagnostic scan tool, retrieve all ABS module Diagnostic Trouble Codes (DTCs).
  • Note all ABS module Diagnostic Trouble Codes (DTCs).

Is DTC C0049:7A present in the ABS module?
Yes GO to I2
No For DTC C0049:01 or C0049:7B,
REFER to: Instrumentation, Message Center and Warning Chimes (413-01 Instrumentation, Message Center and Warning Chimes, Diagnosis and Testing). For all other ABS module Diagnostic Trouble Codes (DTCs), GO to the DTC Chart in this section.

I2 INSPECT THE HYDRAULIC SYSTEM FOR LEAKS
  • Thoroughly inspect the brake system hoses, tubes, joint connections, brake caliper and EBB unit for any signs of an obvious leak.

Are there any obvious signs of a brake fluid leak?
Yes REPAIR the leak or INSTALL a new component as necessary.
No BLEED the brake system.
REFER to: Brake System Pressure Bleeding (206-00 Brake System - General Information, General Procedures).

PINPOINT TEST J: BRAKE SYSTEM FILL NOT COMPLETE

Normal Operation and Fault Conditions

This DTC is pre-set in a new ABS module and can only be cleared when the brake system has been successfully bled.

The brake system requires a certain amount of hydraulic fluid for correct operation. When the brake system is filled, the ABS module sets a PID . If the vehicle is operated and the ABS module detects this PID has not been set, a DTC is set.

CARRY OUT the Brake System Service Bleed. REFER to: Brake System Pressure Bleeding (206-00 Brake System - General Information, General Procedures).

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ABS C1020:00 Brake System Fill Not Complete: No Sub Type Information This DTC is pre-set in a new ABS module and can only be cleared when the brake system has been successfully bled.
ABS C1020:52 Brake System Fill Not Complete: Not Activated This DTC is pre-set in a new ABS module and can only be cleared when the brake system has been successfully bled.

Possible Sources

  • Brake hydraulic system has not been filled to specified level and successfully bled
Diagnostic steps are not provided for this symptom or DTC.  REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).
PINPOINT TEST K: THE BRAKE WARNING INDICATOR, ABS WARNING INDICATOR OR STABILITY-TRACTION CONTROL INDICATOR (SLIDING-CAR ICON) IS ALWAYS ON OR NEVER ON

Normal Operation and Fault Conditions

With the ignition in RUN, the ABS module continuously monitors the base brake system, the ABS , and the stability control system. If there is a concern present in one of the systems, the ABS module sets a DTC and sends a message to the GWM over the FD-CAN , the GWM relays this message to the IPC . Once the message is received, the IPC illuminates the appropriate warning indicator.

The IPC also illuminates the warning indicators as part of a self test when the ignition is set to RUN or ACC. REFER to: Instrument Panel Cluster (IPC) - System Operation and Component Description (413-01 Instrumentation, Message Center and Warning Chimes, Description and Operation).

Possible Sources

  • Diagnostic Trouble Codes (DTCs) present in the ABS module
  • Low brake fluid
  • Brake fluid level sensor
  • ABS or stability control concern
  • IPC concern

Visual Inspection and Pre-checks

  • Check for ABS module Diagnostic Trouble Codes (DTCs), if there are no Diagnostic Trouble Codes (DTCs) present, refer to Section 413-01 to diagnose the IPC warning indicators.
Diagnostic steps are not provided for this symptom or DTC.  REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).
PINPOINT TEST L: THE HILL START ASSIST FEATURE IS INOPERATIVE

Normal Operation and Fault Conditions

The hill start assist feature automatically engages when the conditions for engagement have been met. The ABS module receives messages from the RCM indicating vehicle incline and the PCM indicating the vehicle is not parked. The wheel speed sensors and EBB internal brake pedal switch indicate the vehicle has fully stopped. Once these conditions are met, the ABS module closes the isolation valves in the EBB which temporarily holds the vehicle in place.

In the case of a system error, messages are displayed in the message center and Diagnostic Trouble Codes (DTCs) may be set in one or more modules.

Possible Sources

  • Network concern
  • RCM concern
  • PCM concern
  • FCIM concern
  • ABS module (part of the EBB unit)

Visual Inspection and Pre-checks

  • Retrieve and diagnose all Diagnostic Trouble Codes (DTCs) from the modules listed in the Possible Causes.
Diagnostic steps are not provided for this symptom or DTC.  REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).
PINPOINT TEST M: FRONT WHEEL SPEED SENSOR ELECTRICAL FAULTS
Introduction

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.


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

Normal Operation and Fault Conditions

Active wheel speed sensors generate a voltage 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. The 2 circuits provide both sensor power and sensor signal return. When the ignition mode is set to ON, the ABS module carries out a self-test by sending a reference voltage through the wheel speed sensors and their circuitry.

REFER to: Anti-Lock Brake System (ABS) and Stability Control - 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 Condition
ABS C0031:01 Left Front Wheel Speed Sensor: General Electrical Failure Sets when the wheel speed signal continuously exceeds a specified threshold or is operating outside of the allowable range
ABS C0034:01 Right Front Wheel Speed Sensor: General Electrical Failure Sets when the wheel speed signal continuously exceeds a specified threshold or is operating outside of the allowable range

Possible Sources

  • Wiring, terminals or connectors
  • Wheel speed sensor
  • ABS module (part of the EBB unit)

Visual Inspection and Pre-checks

  • Make sure the wheel speed sensor harness is routed correctly and is undamaged.
  • Make sure the wheel speed sensor electrical connector is free from any corrosion or other contaminants.
PINPOINT TEST N: REAR WHEEL SPEED SENSOR ELECTRICAL FAULTS
Introduction

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.


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

Normal Operation and Fault Conditions

Active wheel speed sensors generate a voltage 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. The 2 circuits provide both sensor power and sensor signal return. When the ignition mode is set to ON, the ABS module carries out a self-test by sending a reference voltage through the wheel speed sensors and their circuitry.

REFER to: Anti-Lock Brake System (ABS) and Stability Control - 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 Condition
ABS C0037:01 Left Rear Wheel Speed Sensor: General Electrical Failure Sets when the wheel speed signal continuously exceeds a specified threshold or is operating outside of the allowable range
ABS C003A:01 Right Rear Wheel Speed Sensor: General Electrical Failure Sets when the wheel speed signal continuously exceeds a specified threshold or is operating outside of the allowable range

Possible Sources

  • Wiring, terminals or connectors
  • Wheel speed sensor
  • ABS module (part of the EBB unit)

Visual Inspection and Pre-checks

  • Make sure the wheel speed sensor harness is routed correctly and is undamaged.
  • Make sure the wheel speed sensor electrical connector is free from any corrosion or other contaminants.
PINPOINT TEST O: THE TRACTION CONTROL SYSTEM IS INOPERATIVE OR CANNOT BE DISABLED USING THE TRACTION CONTROL SWITCH
Introduction

Normal Operation and Fault Conditions

The traction control switch is used to switch the traction control system on or off. When the traction control switch is pressed, the FCIM receives a ground signal from the switch and sends a message over the HS-CAN3 to the GWM . The GWM sends the message out to the IPC and the ABS module. When the IPC receives the message, the module illuminates the stability-traction control OFF indicator. When the ABS module receives the message, the module takes the necessary action depending on the switch inputs and traction control message.

REFER to: Anti-Lock Brake System (ABS) and Stability Control - 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 Condition
ABS C1109:64 Vehicle Dynamics Control Switch: Signal Plausibility Failure Sets when the ABS module detects the traction control switch pressed in the applied position for longer than 10 seconds. This can be due to a wiring concern in the traction control circuit or an internal failure of the traction control switch.

Possible Sources

  • A MyKey restricted key is in use
  • Wiring, terminals or connectors
  • Insturment panel console switch assembly
  • FCIM

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.

PINPOINT TEST P: PARKING BRAKE FAULT

NOTE: Diagnostics in Workshop Manual Section 206-05 must be carried out before proceeding with this test.

Normal Operation and Fault Conditions

The EBB unit ( HCU and ABS module assembly) controls the EPB system.

REFER to: Parking Brake - System Operation and Component Description (206-05 Parking Brake and Actuation, Description and Operation).

REFER to: Anti-Lock Brake System (ABS) and Stability Control - System Operation and Component Description (206-09 Anti-Lock Brake System (ABS) and Stability Control, Description and Operation).

Possible Sources

  • EPB system concern
P1 VERIFY EPB (ELECTRIC PARKING BRAKE) DIAGNOSTICS HAVE BEEN CARRIED OUT
  • Verify all applicable diagnostics in Workshop Manual section 206-05 for the EPB concern have been carried out.

Have you been directed to this test from Workshop Manual section 206-05?
Yes GO to Pinpoint Test Y
No CARRY OUT all applicable diagnostics for the EPB concern in section 206-05.
REFER to: Parking Brake (206-05 Parking Brake and Actuation, Diagnosis and Testing).

PINPOINT TEST Q: EBB (ELECTRIC BRAKE BOOSTER) POWER ASSIST CONCERNS - EXCESSIVE POWER ASSIST OR NO POWER ASSIST

Normal Operation and Fault Conditions

The EBB unit ( HCU and ABS module assembly) provides power assist to the hydraulic brake system. REFER to: Anti-Lock Brake System (ABS) and Stability Control - System Operation and Component Description (206-09 Anti-Lock Brake System (ABS) and Stability Control, Description and Operation).

To diagnose power brake assist concerns, retrieve and repair all Diagnostic Trouble Codes (DTCs) from the ABS module.

Possible Sources

  • EBB unit ( HCU and ABS module assembly) concern
Diagnostic steps are not provided for this symptom or DTC.  REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).
PINPOINT TEST Y: ABS MODULE INTERNAL FAULT CONCERN
Introduction

Normal Operation and Fault Conditions

The ABS module carries out self tests during operation, the module also monitors various inputs and compares the values to what is expected. If the values received are out of range, are not what is expected, or if any of the self tests fail, the ABS module sets a DTC .

REFER to: Anti-Lock Brake System (ABS) and Stability Control - 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 Condition
ABS C1B11:71 Pressure Control Valve: Actuator Stuck Sets when the ABS module detects an unwanted opening or closing of the pressure control valve. This is most likely due to an internal failure of the EBB .
ABS U3000:00 Control Module: No Sub Type Information Sets when the ABS module detects an internal hardware fault.
ABS U3000:49 Control Module: Internal Electronic Failure Sets when the ABS module detects an internal hardware fault.
ABS U3000:4B Control Module: Over Temperature Sets when the ABS module detects an internal hardware fault.
ABS U3000:96 Control Module: Component Internal Failure Sets when the ABS module detects an internal hardware fault.
ABS P1177:64 Synchronization: Signal Plausibility Failure The ABS module monitors the linear actuation motor during operations. The rotational speed and current of the motor is monitored when the motor is spinning-down. If the information is not within specifications or if there is no motor movement, this DTC is set.

Possible Sources

  • HS-CAN concern
  • Incorrect sensor input
  • Stuck valve
  • EBB unit ( HCU and ABS module assembly)
PINPOINT TEST Z: MODULE CONFIGURATION CONCERN
Introduction

Normal Operation and Fault Conditions

During new module installation, configuration files are loaded into the new module being replaced. If a discrepancy is detected between the modules or an incomplete programming procedure is carried out, a DTC is set.

REFER to: Anti-Lock Brake System (ABS) and Stability Control - 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 Condition
ABS C101F:46 Generic Valve Failure: Calibration/Parameter Memory Failure Sets due to incomplete or improper module programming procedures.
ABS C101F:49 Generic Valve Failure: Internal Electronic Failure Sets due to incomplete or improper module programming procedures.
ABS U0300:51 Internal Control Module Software Incompatibility: Not Programmed Sets due to incomplete or improper module programming procedures.
ABS U2017:57 Control Module Software #2: Invalid/Incompatible Software Component Sets due to incomplete or improper module programming procedures.
ABS U2017:93 Control Module Software #2: No Operation Sets due to incomplete or improper module programming procedures.
ABS U2018:57 Control Module Software #3: Invalid/Incompatible Software Component Sets due to incomplete or improper module programming procedures.
ABS 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.
ABS U2100:00 Initial Configuration Not Complete: No Sub Type Information Sets due to incomplete or improper module programming procedures.
ABS U2101:00 Control Module Configuration Incompatible: No Sub Type Information Sets due to incomplete or improper module programming procedures.
ABS U2200:00 Control Module Configuration Memory Corrupt: No Sub Type Information Sets due to incomplete or improper module programming procedures.
ABS C1018:61 Regenerative Braking: Signal Calculation Failure Sets due to incomplete or improper module programming procedures.

Possible Sources

  • Incomplete programming procedure
  • Improper programming procedure
  • EBB unit ( HCU and ABS module assembly)
PINPOINT TEST AB: WHEEL SPEED SENSOR ERRATIC SIGNAL FAULTS
Introduction

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.


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

Normal Operation and Fault Conditions

The wheel speed sensor uses the tone ring to generate a square wave signal proportional to wheel speed which is sent to the ABS module. The front wheel bearing, rear axle shafts, tone rings and wheel speed sensors must be undamaged and free from any 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 signal.

REFER to: Anti-Lock Brake System (ABS) and Stability Control - 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 Condition
ABS C0030:07 Left Front Tone Wheel: Mechanical Failures The ABS module calculates the number of expected tone wheel pulses and then monitors the wheel speed signal input. If 1 or more pulses are missing for more than the allowed time, this DTC is set.
ABS C0031:07 Left Front Wheel Speed Sensor: Mechanical Failures Sets when the wheel speed sensor, encoder or wheel bearing is damaged; if the wheel bearing is not installed correctly; if an incorrectly sized tire is installed; if an excessive air gap exists between the wheel speed sensor and the encoder due to an incorrect component being installed and it affects the sensor input to the ABS module.
ABS C0031:2F Left Front Wheel Speed Sensor: Signal Erratic The ABS module uses the vehicle speed signal as a reference and compares the wheel speed sensor signals to this reference. If an individual wheel speed signal is erratic (too high, too low) for more than the allowed time, this DTC is set.
ABS C0031:64 Left Front Wheel Speed Sensor: Signal Plausibility Failure The ABS module uses the vehicle speed signal as a reference and compares the wheel speed sensor signals to this reference. If 1 or more wheel speed signals does not match the other wheel speeds and the referenced vehicle speed for more than the allowed time, this DTC is set.
ABS C0033:07 Right Front Tone Wheel: Mechanical Failures The ABS module calculates the number of expected tone wheel pulses and then monitors the wheel speed signal input. If 1 or more pulses are missing for more than the allowed time, this DTC is set.
ABS C0034:07 Right Front Wheel Speed Sensor: Mechanical Failures Sets when the wheel speed sensor, encoder or wheel bearing is damaged; if the wheel bearing is not installed correctly; if an incorrectly sized tire is installed; if an excessive air gap exists between the wheel speed sensor and the encoder due to an incorrect component being installed and it affects the sensor input to the ABS module.
ABS C0034:2F Right Front Wheel Speed Sensor: Signal Erratic The ABS module uses the vehicle speed signal as a reference and compares the wheel speed sensor signals to this reference. If an individual wheel speed signal is erratic (too high, too low) for more than the allowed time, this DTC is set.
ABS C0034:64 Right Front Wheel Speed Sensor: Signal Plausibility Failure The ABS module uses the vehicle speed signal as a reference and compares the wheel speed sensor signals to this reference. If 1 or more wheel speed signals does not match the other wheel speeds and the referenced vehicle speed for more than the allowed time, this DTC is set.
ABS C0036:07 Left Rear Tone Wheel: Mechanical Failures The ABS module calculates the number of expected tone wheel pulses and then monitors the wheel speed signal input. If 1 or more pulses are missing for more than the allowed time, this DTC is set.
ABS C0037:07 Left Rear Wheel Speed Sensor: Mechanical Failures Sets when the wheel speed sensor, encoder or wheel bearing is damaged; if the wheel bearing is not installed correctly; if an incorrectly sized tire is installed; if an excessive air gap exists between the wheel speed sensor and the encoder due to an incorrect component being installed and it affects the sensor input to the ABS module.
ABS C0037:2F Left Rear Wheel Speed Sensor: Signal Erratic The ABS module uses the vehicle speed signal as a reference and compares the wheel speed sensor signals to this reference. If an individual wheel speed signal is erratic (too high, too low) for more than the allowed time, this DTC is set.
ABS C0037:64 Left Rear Wheel Speed Sensor: Signal Plausibility Failure The ABS module uses the vehicle speed signal as a reference and compares the wheel speed sensor signals to this reference. If 1 or more wheel speed signals does not match the other wheel speeds and the referenced vehicle speed for more than the allowed time, this DTC is set.
ABS C0039:07 Right Rear Tone Wheel: Mechanical Failures The ABS module calculates the number of expected tone wheel pulses and then monitors the wheel speed signal input. If 1 or more pulses are missing for more than the allowed time, this DTC is set.
ABS C003A:07 Right Rear Wheel Speed Sensor: Mechanical Failures Sets when the wheel speed sensor, encoder or wheel bearing is damaged; if the wheel bearing is not installed correctly; if an incorrectly sized tire is installed; if an excessive air gap exists between the wheel speed sensor and the encoder due to an incorrect component being installed and it affects the sensor input to the ABS module.
ABS C003A:2F Right Rear Wheel Speed Sensor: Signal Erratic The ABS module uses the vehicle speed signal as a reference and compares the wheel speed sensor signals to this reference. If an individual wheel speed signal is erratic (too high, too low) for more than the allowed time, this DTC is set.
ABS C003A:64 Right Rear Wheel Speed Sensor: Signal Plausibility Failure The ABS module uses the vehicle speed signal as a reference and compares the wheel speed sensor signals to this reference. If 1 or more wheel speed signals does not match the other wheel speeds and the referenced vehicle speed for more than the allowed time, this DTC is set.

Possible Sources

  • Tire Pressure
  • Incorrect or mismatched tire
  • Wiring, terminals or connectors
  • Wheel bearing
  • Wheel speed sensor encoder ring
  • Wheel speed sensor
  • ABS module (part of the EBB unit)
PINPOINT TEST AD: STABILITY SYSTEM ACTIVE TOO LONG CONCERN
Introduction

Normal Operation and Fault Conditions

The ABS module uses information from the wheel speed sensors, RCM and PSCM to determine when stability control intervention is necessary to help stabilize the vehicle. The ABS module uses the EBB unit 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 EBB unit. Under inflated 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 .

REFER to: Anti-Lock Brake System (ABS) and Stability Control - 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 Condition
ABS C006B:00 Stability System Active Too Long: No Sub Type Information Sets when the ABS module detects the ABS ESC or RSC function has been active for longer than the various sensors indicate is necessary.

Possible Sources

  • Tire pressure
  • Wiring, terminals or connectors
  • Chassis damage
  • Steering damage or alignment
  • Wheel speed sensor
  • RCM
  • PSCM
PINPOINT TEST AE: ABS MODULE COMMUNICATION CONCERN WITH PSCM
Introduction

Normal Operation and Fault Conditions

With the ignition ON, the PSCM sends messages to the ABS module over the HS-CAN2 through the GWM . If the ABS module does not receive these messages within the allotted time frame or if the messages contain invalid data, the module sets a DTC . This can be due to a PSCM failure, a circuit failure on the network or an excessive load on the network. For information on the messages sent to the ABS module by the PSCM , REFER to: Anti-Lock Brake System (ABS) and Stability Control - 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 Condition
ABS U0131:00 Lost Communication With Power Steering Control Module 'A': No Sub Type Information This DTC sets when the ABS module does not receive any messages from the PSCM within the allowed time.
ABS U0420:00 Invalid Data Received from Power Steering Control Module 'A': No Sub Type Information This DTC sets when the ABS module receives messages from the PSCM , but the messages contain invalid data.

Possible Sources

  • Network communication concern
  • PSCM
PINPOINT TEST AF: ABS MODULE VIN MISMATCH
Introduction

Normal Operation and Fault Conditions

When the ignition is set to ON, the ABS module and the BCM share VIN information through the GWM over the CAN .

When a new EBB unit is installed, the ABS module must be programmed with the vehicle information. REFER to: Module Configuration - System Operation and Component Description (418-01 Module Configuration, Description and Operation).

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ABS U3002:62 Vehicle Identification Number: Signal Compare Failure Sets when the VIN message sent by the BCM does not match the VIN stored in the ABS module.

Possible Sources

  • BCM configuration
  • ABS module configuration
PINPOINT TEST AG: STABILITY CONTROL SENSOR SIGNAL FAILURE FAULTS
Introduction

Normal Operation and Fault Conditions

The ABS module receives vehicle yaw rate, lateral acceleration, longitudinal acceleration and roll rate from RCM over the HS-CAN2 , through the GWM . The yaw rate sensor, lateral accelerometer, longitudinal accelerometer and roll rate sensor are all contained in the RCM . A failure of the HS-CAN2 , an internal failure of the RCM or the internal sensors causes the ABS module to set one or more Diagnostic Trouble Codes (DTCs).

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ABS C0061:28 Lateral Acceleration Sensor: Signal Bias Level Out Of Range/Zero Adjustment Failure Sets when the ABS module detects the sensor signal is greater than the programmed maximum plausible sensor signal.
ABS C0061:64 Lateral Acceleration Sensor: Signal Plausibility Failure Sets when the ABS module detects the sensor signal does not match the other stability sensor signals.
ABS C0062:28 Longitudinal Acceleration Sensor: Signal Bias Level Out Of Range/Zero Adjustment Failure Sets when the ABS module detects the sensor signal is greater than the programmed maximum plausible sensor signal.
ABS C0062:64 Longitudinal Acceleration Sensor: Signal Plausibility Failure Sets when the ABS module detects the sensor signal does not match the other stability sensor signals.
ABS C0063:28 Yaw Rate Sensor: Signal Bias Level Out Of Range/Zero Adjustment Failure Sets when the ABS module detects the sensor signal is greater than the programmed maximum plausible sensor signal.
ABS C0063:64 Yaw Rate Sensor: Signal Plausibility Failure Sets when the ABS module detects the sensor signal does not match the other stability sensor signals.
ABS C0064:28 Roll Rate Sensor: Signal Bias Level Out Of Range/Zero Adjustment Failure Sets when the ABS module detects the sensor signal is greater than the programmed maximum plausible sensor signal.
ABS C0064:64 Roll Rate Sensor: Signal Plausibility Failure Sets when the ABS module detects the sensor signal does not match the other stability sensor signals.

Possible Sources

  • Network communication concern
  • Incorrectly installed RCM
  • RCM
PINPOINT TEST AI: ABS MODULE COMMUNICATION CONCERN WITH PCM
Introduction

Normal Operation and Fault Conditions

With the ignition ON, the PCM sends messages to the ABS module through the GWM over the HS-CAN . The TCM is an internal component of the PCM . If the ABS module does not receive these messages within a certain time frame (usually less than 1 second), the ABS module sets a DTC . For information on the messages sent to the ABS module by the PCM , REFER to: Anti-Lock Brake System (ABS) and Stability Control - 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 Condition
ABS U0100:00 Lost Communication With ECM/PCM 'A': No Sub Type Information This DTC sets when the ABS module does not receive any messages from the PCM within the allowed time.
ABS U0401:00 Invalid Data Received from ECM/PCM A: No Sub Type Information This DTC sets when the ABS module receives invalid data in any of the following messages: accelerator pedal, brake pedal, driven wheel torque or neutral tow status.
ABS U0401:86 Invalid Data Received from ECM/PCM A: Signal Invalid This DTC sets when the ABS module receives invalid data in the accelerator pedal message.
ABS U0402:00 Invalid Data Received from TCM: No Sub Type Information This DTC sets if the ABS module receives invalid data in any one of the several transmission messages from the PCM . This can be due to a PCM failure, a circuit failure on the HS-CAN or an excessive load on the network.
ABS U0101:00 Lost Communication with TCM: No Sub Type Information This DTC sets when the ABS module does not receive any messages from the PCM within the allowed time.

Possible Sources

  • Network communication concern
  • PCM
PINPOINT TEST AL: INCORRECT WHEEL SPEED SENSOR FAULT
Introduction

Normal Operation and Fault Conditions

The ABS module carries out a self-check each time the ignition mode is changed to RUN. If the ABS module detects a fault, one or more Diagnostic Trouble Codes (DTCs) is set.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ABS C0031:4A Left Front Wheel Speed Sensor: Incorrect Component Installed Sets when the ABS module detects an incorrect wheel speed sensor type.
ABS C0034:4A Right Front Wheel Speed Sensor: Incorrect Component Installed Sets when the ABS module detects an incorrect wheel speed sensor type.
ABS C0037:4A Left Rear Wheel Speed Sensor: Incorrect Component Installed Sets when the ABS module detects an incorrect wheel speed sensor type.
ABS C003A:4A Right Rear Wheel Speed Sensor: Incorrect Component Installed Sets when the ABS module detects an incorrect wheel speed sensor type.

Possible Sources

  • Wheel speed sensor input concern
  • Wheel speed sensor
PINPOINT TEST AM: BRAKE PRESSURE SENSOR FAULTS
Introduction

Normal Operation and Fault Conditions

The ABS module monitors various inputs and compares the values to what should be expected. If the values received are out of range or not what should be expected, the ABS module sets a DTC .

REFER to: Anti-Lock Brake System (ABS) and Stability Control - 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 Condition
ABS C0044:49 Brake Pressure Sensor 'A': Internal Electronic Failure Sets when the ABS module detects an internal fault with the EBB unit (electric boosted vehicles) or the HCU (vacuum boosted vehicles).
ABS C0044:51 Brake Pressure Sensor 'A': Not Programmed When a new pressure sensor is calibrated, the information is stored in memory. If the calibration has not taken place or if the calibration files are lost or corrupt, this DTC sets.
ABS C0044:64 Brake Pressure Sensor 'A': Signal Plausibility Failure Sets when the ABS module detects a fault with the brake fluid pressure.
ABS C0044:8F Brake Pressure Sensor 'A': Erratic Sets when the ABS module detects an internal fault with the EBB unit (electric boosted vehicles) or the HCU (vacuum boosted vehicles).
ABS C1A08:1C Pressure Sensor Supply: Circuit Voltage Out Of Range Sets when the ABS module detects the brake system pressure sensor voltage supply is out of range.

Possible Sources

  • Incorrect sensor input
  • Air trapped in the hydraulic system
  • EBB unit (electric boosted vehicles)
  • ABS module and HCU assembly (vacuum boosted vehicles)
PINPOINT TEST AN: STABILITY CONTROL SENSOR INITIALIZATION FAULT
Introduction

Normal Operation and Fault Conditions

The ABS module monitors various inputs and compares the values to what should be expected. If the values received are out of range or not what is expected, the ABS module sets a DTC . When a new ABS module or RCM is installed, the stability control sensors in the RCM must be initialized. This is accomplished using a diagnostic scan tool to run the ABS Calibration routine.

REFER to: Anti-Lock Brake System (ABS) and Stability Control - 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 Condition
ABS C0061:54 Lateral Acceleration Sensor: Missing Calibration Sets when the ABS module detects the stability sensors in the RCM have not been calibrated or the calibration has been lost.
ABS C0062:54 Longitudinal Acceleration Sensor: Missing Calibration Sets when the ABS module detects the stability sensors in the RCM have not been calibrated or the calibration has been lost.
ABS C006A:95 Multi-axis Acceleration Sensor: Incorrect Assembly The sensor cluster sends an identification number to the ABS module when the ABS Calibration routine is carried out, this identification number is shared between the modules when the ignition is set to ON. This received sets when the sensor cluster identification number does not match the last valid identification number and the new valid sensor identification number.

Possible Sources

  • ABS Calibration routine not carried out
  • RCM concern
  • EBB unit ( HCU and ABS module assembly)
PINPOINT TEST AQ: CRUISE CONTROL BRAKING FAULT
Introduction

Normal Operation and Fault Conditions

The CCM is an internal component of the Advanced Driver Assistance Systems (ADAS) module.

The Advanced Driver Assistance Systems (ADAS) module receives information from the forward looking radar module along a private CAN . The Advanced Driver Assistance Systems (ADAS) module sends messages to the ABS module over the FD-CAN . If the ABS module does not receive these messages within the allotted time frame or if the messages contain invalid data, the module sets a DTC . This can be due to a Advanced Driver Assistance Systems (ADAS) module failure, a circuit failure on the network or an excessive load on the network. For information on the messages sent to the ABS module by the CCM and Advanced Driver Assistance Systems (ADAS) module, refer to the Network Message Chart in Section 206-09, Description and Operation in the Workshop Manual.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ABS U2107:68 Collision Mitigation By Braking: Event Information Sets when the ABS module detects the vehicle deceleration 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.
ABS U2108:68 Adaptive Cruise Control: Event Information Sets when the ABS module detects the vehicle deceleration 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.

Possible Sources

  • Network communication concern
  • CCM - part of the Advanced Driver Assistance Systems (ADAS) module
PINPOINT TEST AR: ABS MODULE COMMUNICATION CONCERN WITH IPC
Introduction

Normal Operation and Fault Conditions

With the ignition ON, the IPC sends messages to the ABS module through the GWM over the HS-CAN3 . If the ABS module does not receive these messages within a certain time frame, the module sets a DTC . For information on the messages sent to the ABS module by the IPC , REFER to: Anti-Lock Brake System (ABS) and Stability Control - 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 Condition
ABS U0155:00 Lost Communication With Instrument Panel Cluster (IPC) Control Module: No Sub Type Information This DTC sets when the ABS module does not receive any messages from the IPC within the allowed time.

Possible Sources

  • Network communication concern
  • GWM
  • IPC
PINPOINT TEST AS: ABS (ANTI-LOCK BRAKE SYSTEM) MODULE COMMUNICATION CONCERN WITH FCIM (FRONT CONTROLS INTERFACE MODULE)
Introduction
Refer to Wiring Diagrams Cell 14 for schematic and connector information.

Normal Operation and Fault Conditions

With the ignition ON, the FCIM sends messages to the ABS module through the GWM over the MS-CAN . If the ABS module does not receive these messages within a certain time frame (usually less than 1 second), the module sets a DTC . For information on the messages sent to the ABS module by the FCIM , REFER to: Anti-Lock Brake System (ABS) and Stability Control - 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 Condition
ABS U0256:00 Lost Communication With Front Controls Interface Module 'A': No Sub Type Information Sets in continuous memory and on-demand when the ABS module is missing any of the FCIM messages. This can be due to a FCIM failure, a circuit failure on the MS-CAN or an excessive load on the network.
ABS U0557:86 Invalid Data Received From Front Controls Interface Module 'A': Signal Invalid This DTC sets if the auto hold switch status message from the FCIM contains 'invalid' or 'faulted' instead of the actual switch state. This can be due to a FCIM failure, a circuit failure on the MS-CAN or an excessive load on the network.

Possible Sources

  • Network communication concern
  • FCIM
  • GWM
PINPOINT TEST AV: ABS MODULE COMMUNICATION CONCERN WITH THE GSM
Introduction

Normal Operation and Fault Conditions

With the ignition ON, the GSM sends messages to the ABS module over the HS-CAN2 through the GWM . If the ABS module does not receive these messages within the allotted time frame or if the messages contain invalid data, the module sets a DTC . This can be due to a GSM failure, a circuit failure on the network or an excessive load on the network. For information on the messages sent to the ABS module by the GSM , REFER to: Anti-Lock Brake System (ABS) and Stability Control - 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 Condition
ABS U0103:00 Lost Communication With Gear Shift Control Module A: No Sub Type Information This DTC sets when the ABS module does not receive any messages from the GSM within the allowed time.
ABS U0404:00 Invalid Data Received from Gear Shift Control Module A: No Sub Type Information This DTC sets when the ABS module receives messages from the GSM , but the messages contain invalid data.

Possible Sources

  • Network communication concern
  • GWM
  • GSM
PINPOINT TEST BF: ABS FALSE ACTIVATION, ABS TOO SENSITIVE, ABS ACTIVATES ON NORMAL STOP
Introduction

Normal Operation and Fault Conditions

The ABS module uses several sensors (wheel speed, steering wheel rotation, stability control) to determine if ABS or stability control intervention is required. Accurate sensor readings rely on the vehicle being in good operational condition with as few mechanical and electrical concerns as possible. In addition, the wheels and tires must be within vehicle manufacturer's specifications as described on the VC label and the base brake system and parking brake system must be in good operational condition. If one or more of these items or systems are in need or repair or are not working at full capacity, the ABS or stability control system may activate when the driving condition does not warrant activation.

Possible Sources

  • Wheels
  • Tires
  • Suspension components
  • Parking brake dragging
  • PSCM
  • RCM
PINPOINT TEST BH: ABS (ANTI-LOCK BRAKE SYSTEM) MODULE COMMUNICATION CONCERN WITH THE RCM (RESTRAINTS CONTROL MODULE)
Introduction
Refer to Wiring Diagrams Cell 14 for schematic and connector information.

Normal Operation and Fault Conditions

With the ignition ON, the RCM sends messages to the ABS module over the HS-CAN2 . 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 RCM , REFER to: Anti-Lock Brake System (ABS) and Stability Control - 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 Condition
ABS U0151:00 Lost Communication With Restraints Control Module: No Sub Type Information Sets if the time allotted for stability sensor messages expires before the ABS module receives any stability sensor messages.
ABS U0452:00 Invalid Data Received From Restraints Control Module: No Sub Type Information Sets if the ABS module recieves invalid longitudinal acceleration data from the RCM . This can be due to an incorrectly installed RCM , an RCM that has not been initialized, or an internal failure of the sensor.
ABS U0452:86 Invalid Data Received From Restraints Control Module: Signal Invalid Sets if the ABS module recieves invalid longitudinal acceleration data from the RCM . This can be due to an incorrectly installed RCM , an RCM that has not been initialized, or an internal failure of the sensor.

Possible Sources

  • Network communication concern
  • RCM
PINPOINT TEST BM: ABS MODULE COMMUNICATION CONCERN WITH THE ATCM (ALL TERRAIN CONTROL MODULE)
Introduction

NOTE: The ATCM may also be called the traction control switch in other publications

Normal Operation and Fault Conditions

With the ignition ON, the ATCM 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 (usually less than 1 second), the ABS module sets a DTC . For information on the messages sent to the ABS module by the ATCM , refer to the Description and Operation in Section 206-09 of the Workshop Manual.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ABS U0138:00 Lost Communication with All Terrain Control Module: No Sub Type Information This DTC sets when the ABS module does not receive any messages from the IPMA within the allowed time.
ABS U0439:00 Invalid Data Received From All Terrain Control Module: No Sub Type Information This DTC sets when the ABS module receives messages from the IPMA , but the messages contain invalid data.

Possible Sources

  • Network communication concern
  • ATCM
PINPOINT TEST BP: ABS (ANTI-LOCK BRAKE SYSTEM) MODULE COMMUNICATION CONCERN WITH THE GWM (GATEWAY MODULE A)
Introduction
Refer to Wiring Diagrams Cell 14 for schematic and connector information.

Normal Operation and Fault Conditions

REFER to: Anti-Lock Brake System (ABS) and Stability Control - System Operation and Component Description (206-09 Anti-Lock Brake System (ABS) and Stability Control, Description and Operation).

With the ignition ON, the GWM sends messages to the ABS module over the HS-CAN2 . 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). This can be due to a GWM failure, a circuit failure on the CAN or an excessive load on the network.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ABS U0146:00 Lost Communication With Serial Data Gateway 'A': No Sub Type Information This DTC sets in the ABS module if the messages from the GWM are missing for more than 5 seconds.

Possible Sources

  • Network communication concern
  • GWM
PINPOINT TEST BR: ABS MODULE COMMUNICATION CONCERN WITH VDM
Introduction

Normal Operation and Fault Conditions

With the ignition ON, the VDM sends messages to the ABS module over the HS-CAN2 through the GWM . If the ABS module does not receive these messages within a certain time frame or if the messages contain invalid data, the ABS module sets Diagnostic Trouble Codes (DTCs). For information on the messages sent to the ABS module by the VDM , REFER to: Anti-Lock Brake System (ABS) and Stability Control - 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 Condition
ABS U0122:00 Lost Communication With Vehicle Dynamics Control Module: No Sub Type Information This DTC sets in the ABS module when the dynamic suspension data message from the VDM is missing for at least 5 seconds.

Possible Sources

  • Fuses
  • Network communication concern
  • VDM
PINPOINT TEST BQ: ABS MODULE COMMUNICATION CONCERN WITH THE IPMA
Introduction

Normal Operation and Fault Conditions

The IPMA is an internal component of the Advanced Driver Assistance Systems (ADAS) module.

With the ignition ON, the IPMA sends messages to the ABS module the over the HS-CAN2 . If the ABS module does not receive these messages within a certain time frame, the module sets Diagnostic Trouble Codes (DTCs). This can be due to an IPMA failure, a circuit failure on the network or an excessive load on the network.

REFER to: Anti-Lock Brake System (ABS) and Stability Control - 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 Condition
ABS U023A:00 Lost Communication With Image Processing Module A: No Sub Type Information This DTC sets when the ABS module does not receive any messages from the IPMA within the allowed time.
ABS U053B:00 Invalid Data Received From Image Processing Module A: No Sub Type Information This DTC sets when the ABS module receives messages from the IPMA , but the messages contain invalid data.

Possible Sources

  • Network communication concern
  • IPMA - part of the Advanced Driver Assistance Systems (ADAS) module
PINPOINT TEST BX: ABS MODULE COMMUNICATION CONCERN WITH AWD (ALL-WHEEL DRIVE) MODULE
Introduction

Normal Operation and Fault Conditions

With the ignition ON, the AWD module sends messages to the ABS module through the GWM over the HS-CAN 2. If the ABS module does not receive these messages within the specified time frame, the ABS module sets a DTC . This can be due to a AWD module failure, a circuit failure on the network or an excessive load on the network. For information on the messages sent to the ABS module by the AWD module, REFER to: Anti-Lock Brake System (ABS) and Stability Control - 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 Condition
ABS U011D:00 Lost Communication With All Wheel Drive Control Module: No Sub Type Information This DTC sets when the ABS module does not receive any messages from the AWD module.
ABS U041E:00 Invalid Data Received From All Wheel Drive Control Module: No Sub Type Information This DTC sets when the ABS module recieves the AWD locking torque message with invalid data for more than the alloted time

Possible Sources

  • Network communication concern
  • GWM
  • AWD module
PINPOINT TEST BY: ABS (ANTI-LOCK BRAKE SYSTEM) MODULE COMMUNICATION CONCERN WITH THE PAM (PARKING ASSIST CONTROL MODULE)
Introduction
Refer to Wiring Diagrams Cell 14 for schematic and connector information.

Normal Operation and Fault Conditions

With the ignition ON, the PAM sends messages to the ABS module through the GWM over the CAN . If the ABS module does not receive these messages within a certain time frame, the module sets one or more Diagnostic Trouble Codes (DTCs). This can be due to an PAM failure, a circuit failure on the network or an excessive load on the network. For information on the messages sent to the ABS module by the PAM , REFER to: Anti-Lock Brake System (ABS) and Stability Control - 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 Condition
ABS U0159:00 Lost Communication With Parking Assist Control Module 'A': No Sub Type Information sets when the ABS module does not receive messages from the PAM in the alloted time. This can be due to a PAM failure, a circuit failure on the network or an excessive load on the network.

Possible Sources

  • Network communication concern
  • PAM
  • GWM
PINPOINT TEST BZ: ABS (ANTI-LOCK BRAKE SYSTEM) MODULE COMMUNICATION CONCERN WITH THE SODL (SIDE OBSTACLE DETECTION CONTROL MODULE LH) OR SODR (SIDE OBSTACLE DETECTION CONTROL MODULE RH)
Introduction
Refer to Wiring Diagrams Cell 14 for schematic and connector information.

Normal Operation and Fault Conditions

With the ignition ON, the SODL and SODR send messages to the ABS module through the GWM over the CAN . If the ABS module does not receive these messages within a certain time frame, the ABS module sets one or more Diagnostic Trouble Codes (DTCs). This can be due to a SODL or SODR failure, a circuit failure on the CAN or an excessive load on the network. For information on the messages sent to the ABS module by the SODL and SODR , REFER to: Anti-Lock Brake System (ABS) and Stability Control - 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 Condition
ABS U0232:00 Lost Communication With Side Obstacle Detection Control Module 'A': No Sub Type Information Sets when the ABS module does not receive messages from the SODL in the alloted time. This can be due to a SODL failure, a circuit failure on the network or an excessive load on the network.
ABS U0233:00 Lost Communication With Side Obstacle Detection Control Module 'B': No Sub Type Information Sets when the ABS module does not receive messages from the SODR in the alloted time. This can be due to a SODR failure, a circuit failure on the network or an excessive load on the network.

Possible Sources

  • Network communication concern
  • SODL
  • SODR
  • GWM
PINPOINT TEST CH: THE AUTO HOLD FEATURE IS INOPERATIVE, CANNOT BE DISABLED OR ENABLED
Introduction

Normal Operation and Fault Conditions

Vehicles equipped with EPB are also equipped with an auto hold feature. This feature must be enabled by the driver by pressing the auto hold switch once the driver seatbelt is buckled and the driver door is closed.

Pressing the auto hold switch in the FCIM enables the auto hold feature, but does not activate auto hold. When the switch is pressed, the FCIM sends a message to the ABS module indicating the system has been enabled. The ABS module then waits for messages from the RCM and BCM as well as ABS sensor information to indicate the auto hold feature can be activated. Once all criteria has been met, the ABS module activates the auto hold feature.

In the case of a system error, the instrument cluster displays messages and icons.

Possible Sources

  • Network communication concern
  • FCIM concern
  • ABS module
PINPOINT TEST CK: ABS MODULE COMMUNICATION CONCERN WITH THE IPMB
Introduction

Normal Operation and Fault Conditions

With the ignition ON, the IPMB sends messages to the ABS module over the HS-CAN 2. If the ABS module does not receive these messages within the allotted time frame, the module sets a DTC . This can be due to an IPMB failure, a circuit failure on the network or an excessive load on the network. For information on the messages sent to the ABS module by the IPMB , REFER to: Anti-Lock Brake System (ABS) and Stability Control - 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 Condition
ABS U023B:00 Lost Communication With Image Processing Module B: No Sub Type Information This DTC sets when the ABS module does not receive any messages from the IPMB within the allowed time.

Possible Sources

  • Network communication concern
  • IPMB - part of the Advanced Driver Assistance Systems (ADAS) module
PINPOINT TEST CM: ABS MODULE COMMUNICATION CONCERN WITH HEV PCM
Introduction

Normal Operation and Fault Conditions

The HEV PCM may also be known as the SOBDM or the ICS module.

With the ignition ON, the SOBDM sends messages to the ABS module through the GWM over the HS-CAN . If the ABS module does not receive these messages within a certain time frame (usually less than 1 second), the ABS module sets a DTC . For information on the messages sent to the ABS module by the SOBDM , REFER to: Anti-Lock Brake System (ABS) and Stability Control - 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 Condition
ABS U0293:00 Lost Communication With Hybrid/EV Powertrain Control Module 'A': No Sub Type Information This DTC sets when the ABS module does not receive any messages from the SOBDM within the allowed time.

Possible Sources

  • Network communication concern
  • GWM
  • SOBDM
PINPOINT TEST CO: ELECTRIC BRAKE BOOSTER (EBB) UNIT INTERNAL FAILURE
Introduction

Normal Operation and Fault Conditions

The EBB contains several hydraulic valves, hydraulic pressure sensors, a linear actuator and a pump motor. These components work in conjunction to provide the force necessary to bring the vehicle to a stop. The ABS module monitors these components for internal faults. If a fault occurs which impacts the base braking system, the ABS module sets one or more Diagnostic Trouble Codes (DTCs) and illuminates the red brake warning indicator.

REFER to: Anti-Lock Brake System (ABS) and Stability Control - 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 Condition
ABS C0047:1C Brake Booster Pressure Sensor: Circuit Voltage Out Of Range This DTC sets when a higher or lower than expected pressure sensor voltage which is detected within the EBB unit.
ABS C0047:64 Brake Booster Pressure Sensor: Signal Plausibility Failure This DTC sets when a pressure sensor reading that does not match what is expected is detected within the EBB unit.
ABS C1013:09 Brake System Pressure: Component Failures This DTC sets when an internal component failure is detected within the EBB unit.
ABS C1013:7A Brake System Pressure: Fluid Leak Or Seal Failure This DTC sets when a loss of brake fluid pressure is detected within the brake system.
ABS C1013:7C Brake System Pressure: Slow Response This DTC sets when a slow responding brake pressure signal is detected within the EBB unit.
ABS C1013:92 Brake System Pressure: Performance Or Incorrect Operation This DTC sets when a loss of brake pressure or excessive brake pressure is detected within the brake system.
ABS C1019:29 Linear Actuator Control (LAC): Signal Invalid This DTC sets an invalid signal is sent from the Linear Actuator Control.
ABS C1019:78 Linear Actuator Control (LAC): Alignment Or Adjustment Incorrect This DTC sets when a misalignment or misadjustment concern with the Linear Actuator Control is detected.
ABS C1019:92 Linear Actuator Control (LAC): Performance Or Incorrect Operation This DTC sets when a lack of performance or operation in the Linear Actuator Control is detected.
PCM P0556:00 Brake Booster Pressure Sensor Circuit Range/Performance: No Sub Type Information This DTC sets due to differences between the brake booster mounted vacuum sensor signal and the PCM calculated vacuum level. This DTC does not illuminate any warning indicators nor are there any associated service messages.
PCM P0557:00 Brake Booster Pressure Sensor Circuit Low: No Sub Type Information This DTC sets due to differences between the brake booster mounted vacuum sensor signal and the PCM calculated vacuum level. This DTC does not illuminate any warning indicators nor are there any associated service messages.
PCM P05FF:00 Brake Pressure Sensor / Brake Pedal Position Sensor Correlation: No Sub Type Information This DTC sets if the information from the brake pressure sensor and brake pedal position sensor do not match. This is most likely due to sensor concerns, wiring harness concerns or vehicle communication concerns.
ABS C0040:64 Brake Pedal Switch 'A': Signal Plausibility Failure This DTC sets due to any of the following conditions:
  • The BPP swtich signal is active for more than 6 minutes when traveling faster than 20 km/h (12 mph), the brake fluid pressure is equal to or below 3 bar (44 psi) and the BPP switch signal has never been inactive during the current ignition cycle.
  • If the BPP switch signal is active for more than 12 minutes when traveling faster than 20 km/h (12 mph), the brake fluid pressure is equal to or below 3 bar (44 psi) and the BPP switch signal has been inactive during the current ignition cycle.
  • If the BPP switch CAN messages are missing.
  • If the brake fluid pressure exceeds 15 bar (218 psi) and the BPP switch signal is inactive for longer than 1 second.

Possible Sources

  • Air trapped in the hydraulic system
  • External brake system leak
  • Internal EBB unit leak
  • EBB unit internal failure
PINPOINT TEST CP: ELECTRIC BRAKE BOOSTER (EBB) MOTOR FAULTS
Introduction

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.


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

Normal Operation and Fault Conditions

The EBB unit uses a motor to pressurize the brake system and to operate the ABS , ESC , RSC and other stability control features. The ABS module monitors the motor performance and sets a DTC when a motor fault is detected.

REFER to: Anti-Lock Brake System (ABS) and Stability Control - 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 Condition
ABS C0594:12 Brake Booster Motor 'A' Performance: Circuit Short To Battery This DTC sets when the ABS module detects a higher voltage than expected.
ABS C0594:78 Brake Booster Motor 'A' Performance: Alignment Or Adjustment Incorrect This DTC sets when the ABS module detects a booster motor adjustment or alignment condition within the HCU .
ABS C0594:92 Brake Booster Motor 'A' Performance: Performance Or Incorrect Operation This DTC sets when the ABS module detects when the brake booster motor 'A' is not performing correctly or is inoperative.
ABS C0596:00 Brake Booster Motor 'A' Current Sensor Circuit Range/Performance: No Sub Type Information This DTC sets when the ABS module detects a current sensor reading outside the expected range.

Possible Sources

  • Fuses
  • Wiring, terminals or connectors
  • EBB unit ( HCU and ABS module assembly)
PINPOINT TEST LA: STEERING WHEEL POSITION SENSOR SIGNAL FAULT
Introduction

Normal Operation and Fault Conditions

The PSCM calculates steering wheel rotation speed, angle and direction of rotation and sends the information to the ABS module through the GWM over the HS-CAN2 . A failure of the HS-CAN2 , the PSCM or the internal sensors causes the ABS module to set one or more Diagnostic Trouble Codes (DTCs) and the ABS warning indicator is illuminated.

REFER to: Anti-Lock Brake System (ABS) and Stability Control - 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 Condition
ABS C0051:64 Steering Wheel Position Sensor: Signal Plausibility Failure Sets when the ABS module detects 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).
ABS C0051:67 Steering Wheel Position Sensor: Signal Incorrect After Event Sets when the ABS module detects the center position of the steering wheel cannot be determined after 30 seconds of driving at a speed between 14.4 km/h (9 mph) and 48 km/h (30 mph).
ABS C0051:85 Steering Wheel Position Sensor: Signal Above Allowable Range Sets when the ABS module detects the absolute value of the calculated steering wheel angle is greater than a predetermined threshold.
ABS C0051:86 Steering Wheel Position Sensor: Signal Invalid Sets when the PSCM sends the defective status message due to an internal failure.

Possible Sources

  • Incorrectly mounted RCM
  • Network communication concern
  • Incomplete or incorrect stability control sensor calibration
  • Wheels and tires
  • Front suspension components
  • Steering system components
  • RCM
  • PSCM
PINPOINT TEST OB: THE SELECTABLE DRIVE MODE FEATURE IS INOPERATIVE
Introduction

Normal Operation and Fault Conditions

On certain 4x4 vehicles, the ATCM is used to activate and deactivate the selectable drive mode feature. When the driver presses or rotates the ATCM drive mode switch, the ATCM sends a drive mode message out on the HS-CAN2 . When the ABS module receives this message, it takes the necessary action depending on the selectable drive mode message.

On 4x2 vehicles and certain 4x4 vehicles, the selectable drive mode switch in the instrument panel console switch assembly is used to activate and deactivate the selectable drive mode feature. When the driver presses the selectable drive mode switch, the FCIM receives a ground signal over a dedicated circuit. The FCIM sends a drive mode message to the GWM over the HS-CAN3 , the GWM relays this message to the ABS module over the HS-CAN2 . The ABS module takes the necessary action depending on the selectable drive mode message.

REFER to: Anti-Lock Brake System (ABS) and Stability Control - 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 Condition
ABS P05D3:86 Driver Mode Select Switch 'A' Range/Performance: Signal Invalid This DTC sets when the selectable drive mode message sent from the ATCM indicates a stuck switch, when the switch has been pressed for longer than 30 seconds, or a general failure of the switch.

Possible Sources

  • Fuses
  • Wiring, terminals or connectors
  • Insturment panel console switch assembly (if equipped)
  • ATCM (if equipped)
  • FCIM

Visual Inspection and Pre-checks

  • Make sure BCM fuse 18 (7.5A) for the ATCM is OK
PINPOINT TEST ZA: TIRE DIAMETER CONCERNS
Introduction

Normal Operation and Fault Conditions

The BCM is programmed with vehicle tire size information during the module configuration step. The BCM shares tire size information with other module over the HS-CAN1 through the GWM . When this DTC sets, the ABS module sends a message to the IPC to illuminate the ABS warning indicator.

REFER to: Anti-Lock Brake System (ABS) and Stability Control - 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 Condition
ABS C0078:00 Tire Diameter: No Sub Type Information If the tire size message sent to the ABS module from the BCM contains invalid data or the message is not received within the allowed time frame, this DTC sets.

Possible Sources

  • Temporary or mini-spare tire in use
  • Under inflated tires
  • Mismatched sized wheels and tires
  • Network communication concern
  • Incorrect BCM configuration

    Description and Operation - Anti-Lock Brake System (ABS) and Stability Control - System Operation and Component Description

    S..

    Removal and Installation - Electric Brake Booster (EBB)

    Removal NOTE: Removal steps in this procedure may contain installation details. NOTE: The EBB and the ABS module are serviced as an assembly and should not be separated...

    Other information:

    Lincoln Corsair 2020-2022 Service Manual: Removal and Installation - Tie Rod


    Removal NOTE: If servicing the RH (right-hand) tie rod, both bellows boots must be removed. Remove the steering gear boot. Refer to: Steering Gear Boot (211-02 Power Steering, Removal and Installation). NOTICE: Hold the steering gear rack while loosening the tie rod...

    Lincoln Corsair 2020-2022 Service Manual: Removal and Installation - Steering Wheel


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    Categories

    Information on P Type Tires

    Lincoln Corsair. Information on P Type Tires

    P215/65R15 95H is an example of a tire size, load index and speed rating. The definitions of these items are listed below. (Note that the tire size, load index and speed rating for your vehicle may be different from this example.)

    P: Indicates a tire, designated by the Tire and Rim Association, that may be used for service on cars, sport utility vehicles, minivans and light trucks. Note: If your tire size does not begin with a letter this may mean it is designated by either the European Tire and Rim Technical Organization or the Japan Tire Manufacturing Association. 215: Indicates the nominal width of the tire in millimeters from sidewall edge to sidewall edge. In general, the larger the number, the wider the tire. 65: Indicates the aspect ratio which gives the tire's ratio of height to width. R: Indicates a radial type tire. 15: Indicates the wheel or rim diameter in inches. If you change your wheel size, you will have to purchase new tires to match the new wheel diameter. 95: Indicates the tire's load index. It is an index that relates to how much weight a tire can carry. You may find this information in your owner’s manual. If not, contact a local tire dealer.

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