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

Lincoln Navigator 2018-2025 Workshop Manual / Brake System / Anti-Lock Brake System (ABS) and Stability Control / Anti-Lock Brake System (ABS) and Stability Control. Diagnosis and Testing

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 B10DA:51 PATS Target Identifier: Not Programmed GO to Pinpoint Test P
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 C0031:2F Left Front Wheel Speed Sensor: Signal Erratic GO to Pinpoint Test AB
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 C0034:2F Right Front Wheel Speed Sensor: Signal Erratic GO to Pinpoint Test AB
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 C0037:2F Left Rear Wheel Speed Sensor: Signal Erratic GO to Pinpoint Test AB
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:2F Right Rear Wheel Speed Sensor: Signal Erratic GO to Pinpoint Test AB
ABS C003A:64 Right Rear Wheel Speed Sensor: Signal Plausibility Failure GO to Pinpoint Test AB
ABS C0040:01 Brake Pedal Switch 'A': General Electrical Failure GO to Pinpoint Test CW
ABS C0040:04 Brake Pedal Switch 'A': System Internal Failures GO to Pinpoint Test CW
ABS C0040:64 Brake Pedal Switch 'A': Signal Plausibility Failure GO to Pinpoint Test CW
ABS C0041:01 Brake Pedal Switch 'B': General Electrical Failure GO to Pinpoint Test CW
ABS C0041:14 Brake Pedal Switch 'B': Circuit Short To Ground Or Open GO to Pinpoint Test CW
ABS C0041:4B Brake Pedal Switch 'B': Over Temperature GO to Pinpoint Test CW
ABS C0044:49 Brake Pressure Sensor 'A': Internal Electronic Failure 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 C0047:01 Brake Booster Pressure Sensor: General Electrical Failure GO to Pinpoint Test CO
ABS C0047:1C Brake Booster Pressure Sensor: Circuit Voltage Out Of Range GO to Pinpoint Test CO
ABS C0047:31 Brake Booster Pressure Sensor: No Signal 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 L
ABS C0049:7B Brake Fluid Level: Low Fluid Level GO to Pinpoint Test L
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 C0051:96 Steering Wheel Position Sensor: Component Internal Failure GO to Pinpoint Test LA
ABS C0061:28 Lateral Acceleration Sensor: Signal Bias Level Out Of Range/Zero Adjustment Failure GO to Pinpoint Test BH
ABS C0061:64 Lateral Acceleration Sensor: Signal Plausibility Failure GO to Pinpoint Test BH
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 BH
ABS C0063:28 Yaw Rate Sensor: Signal Bias Level Out Of Range/Zero Adjustment Failure GO to Pinpoint Test BH
ABS C0063:64 Yaw Rate Sensor: Signal Plausibility Failure GO to Pinpoint Test BH
ABS C0064:28 Roll Rate Sensor: Signal Bias Level Out Of Range/Zero Adjustment Failure GO to Pinpoint Test BH
ABS C0064:64 Roll Rate Sensor: Signal Plausibility Failure GO to Pinpoint Test BH
ABS C006B:00 Stability System Active Too Long: No Sub Type Information GO to Pinpoint Test AD
ABS C0072:4B Brake Temperature Too High: Over Temperature GO to Pinpoint Test X
ABS C0078:56 Tire Diameter: Invalid/Incompatible Configuration GO to Pinpoint Test ZA
ABS C052F:00 ABS Pump Motor Supply Voltage 'A' Circuit/Open: No Sub Type Information GO to Pinpoint Test A
ABS C0564:00 ABS Control Module System Voltage Low: No Sub Type Information GO to Pinpoint Test A
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 C05CC:00 Brake Master Cylinder Piston Position Sensor 'A' Circuit Range/Performance: No Sub Type Information GO to Pinpoint Test Z
ABS C05CF:00 Brake Master Cylinder Piston Position Sensor 'B' Circuit Range/Performance: No Sub Type Information GO to Pinpoint Test Z
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 C1013:92 Brake System Pressure: Performance Or Incorrect Operation GO to Pinpoint Test CO
ABS C101F:49 Generic Valve Failure: Internal Electronic Failure GO to Pinpoint Test Y
ABS C1020:00 Brake System Fill Not Complete: No Sub Type Information GO to Pinpoint Test H
ABS C102E:48 Stability Control System: Supervision Software Failure GO to Pinpoint Test Z
ABS C1109:24 Vehicle Dynamics Control Switch: Signal Stuck High GO to Pinpoint Test E
ABS C1A08:1C Pressure Sensor Supply: Circuit Voltage Out Of Range GO to Pinpoint Test Y
ABS C1A95:01 Wheel Speed Sensor: General Electrical Failure GO to Pinpoint Test M
ABS C1A95:01 Wheel Speed Sensor: General Electrical Failure GO to Pinpoint Test N
ABS C1A95:64 Wheel Speed Sensor: Signal Plausibility Failure GO to Pinpoint Test AB
ABS P05D3:86 Driver Mode Select Switch 'A' Range/Performance: Signal Invalid GO to Pinpoint Test BM
ABS P0604:8F Internal Control Module Random Access Memory (RAM) Error: Erratic GO to Pinpoint Test Z
ABS U0100:00 Lost Communication With ECM/PCM 'A': No Sub Type Information GO to Pinpoint Test AI
ABS U0102:00 Lost Communication with Transfer Case Control Module: No Sub Type Information GO to Pinpoint Test AU
ABS U0103:00 Lost Communication With Gear Shift Control Module A: No Sub Type Information GO to Pinpoint Test AV
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 U0136:00 Lost Communication With Differential Control Module - Rear: No Sub Type Information GO to Pinpoint Test V
ABS U0137:00 Lost Communication With Trailer Brake Control Module: No Sub Type Information GO to Pinpoint Test S
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 CI
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 U0164:00 Lost Communication With HVAC Control Module: No Sub Type Information GO to Pinpoint Test CE
ABS U0212:00 Lost Communication With Steering Column Control Module: No Sub Type Information GO to Pinpoint Test BV
ABS U023A:00 Lost Communication With Image Processing Module A: No Sub Type Information GO to Pinpoint Test BQ
ABS U0253:00 Lost Communication With Accessory Protocol Interface Module: No Sub Type Information GO to Pinpoint Test CL
ABS U0401:00 Invalid Data Received from ECM/PCM A: No Sub Type Information GO to Pinpoint Test AI
ABS U0401:64 Invalid Data Received from ECM/PCM A: Signal Plausibility Failure GO to Pinpoint Test AI
ABS U0401:86 Invalid Data Received from ECM/PCM A: Signal Invalid GO to Pinpoint Test AI
ABS U0402:86 Invalid Data Received from TCM: Signal Invalid GO to Pinpoint Test AI
ABS U0403:00 Invalid Data Received From Transfer Case Control Module: No Sub Type Information GO to Pinpoint Test AU
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 U0423:00 Invalid Data Received from Instrument Panel Cluster Control Module: No Sub Type Information GO to Pinpoint Test AR
ABS U0424:86 Invalid Data Received From HVAC Control Module: Signal Invalid GO to Pinpoint Test CE
ABS U0439:00 Invalid Data Received From All Terrain Control Module: No Sub Type Information GO to Pinpoint Test BM
ABS U0439:86 Invalid Data Received From All Terrain Control Module: Signal Invalid GO to Pinpoint Test BM
ABS U0452:02 Invalid Data Received From Restraints Control Module: General Signal Failure GO to Pinpoint Test BH
ABS U0452:41 Invalid Data Received From Restraints Control Module: General Checksum Failure 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 U0554:86 Invalid Data Received From Accessory Protocol Interface Module: Signal Invalid GO to Pinpoint Test CL
ABS U2001:00 Reduced System Function: No Sub Type Information GO to Pinpoint Test G
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 U202B:61 In-Use Application Signing Key: Signal Calculation Failure GO to Pinpoint Test Z
ABS U202B:62 In-Use Application Signing Key: Signal Compare Failure 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 U2107:00 Collision Mitigation By Braking: No Sub Type Information GO to Pinpoint Test R
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 U3000:04 Control Module: System Internal Failures GO to Pinpoint Test Y
ABS U3000:41 Control Module: General Checksum Failure GO to Pinpoint Test Y
ABS U3000:44 Control Module: Data Memory Failure GO to Pinpoint Test Y
ABS U3000:45 Control Module: Program Memory Failure GO to Pinpoint Test Y
ABS U3000:47 Control Module: Watchdog/Safety µC Failure GO to Pinpoint Test Y
ABS U3000:48 Control Module: Supervision Software Failure 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 U3000:52 Control Module: Not Activated GO to Pinpoint Test Y
ABS U3000:96 Control Module: Component Internal Failure GO to Pinpoint Test Y
ABS U3001:68 Control Module Improper Shutdown Performance: Event Information GO to Pinpoint Test T
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

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
ABS false activation, ABS too sensitive, ABS activates on normal stop   GO to Pinpoint Test BF
The ABS module does not respond to the diagnostic scan tool   GO to Pinpoint Test AT
The ABS warning indicator is always on or never on   GO to Pinpoint Test AS
The auto hold feature in the ATCM is inoperative, disabled or cannot be enabled   GO to Pinpoint Test BM
The brake warning indicator is always on or never on   GO to Pinpoint Test AS
Excessive power brake assist   GO to Pinpoint Test U
The hill descent control feature is inoperative   GO to Pinpoint Test AR
The hill start assist feature is inoperative   GO to Pinpoint Test O
No power brake assist   GO to Pinpoint Test U
Parking brake faults   GO to Pinpoint Test Y
The selectable drive mode feature is inoperative   GO to Pinpoint Test BM
The stability control system is active too long   GO to Pinpoint Test AD
The stability-traction control warning indicator is always on or never on   GO to Pinpoint Test AS
The traction control system is inoperative, cannot be disabled or enabled   GO to Pinpoint Test E

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 .

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ABS C052F:00 ABS Pump Motor Supply Voltage 'A' Circuit/Open: No Sub Type Information Sets when there is a circuit concern, such as an open or short, on the hydraulic pump motor voltage supply circuit.
ABS C0564:00 ABS Control Module System Voltage Low: No Sub Type Information Sets if the voltage supplied to the ABS module falls below 5.5 volts.
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

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 or ABS module fuses in the BJB are OK.
PINPOINT TEST CE: ABS MODULE COMMUNICATION CONCERN WITH HVAC MODULE
Introduction

Normal Operation and Fault Conditions

With the ignition ON, the HVAC control module sends messages to the GWM over the MS-CAN , The GWM relays these 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 HVAC control 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 HVAC control 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 U0164:00 Lost Communication With HVAC Control Module: No Sub Type Information This DTC sets when the ABS module does not receive any messages from the HVAC module within the allowed time.
ABS U0424:86 Invalid Data Received From HVAC Control Module: Signal Invalid This DTC sets when the ABS module receives messages from the HVAC module, but the messages contain invalid data.

Possible Sources

  • Network communication concern
  • GWM
  • HVAC control module
PINPOINT TEST CI: ABS MODULE COMMUNICATION CONCERN WITH GWM
Introduction

Normal Operation and Fault Conditions

With the ignition ON, the GWM 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 GWM 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 GWM , 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 U0146:00 Lost Communication With Serial Data Gateway 'A': No Sub Type Information This DTC sets when the ABS module does not receive any messages from the GWM within the allowed time.

Possible Sources

  • Network communication concern
  • GWM
PINPOINT TEST D: ABS MODULE COMMUNICATION CONCERN WITH BCM
Introduction

Normal Operation and Fault Conditions

With the ignition ON, the BCM sends messages to the GWM over the HS-CAN1 . The GWM relays these message 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 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 OR CANNOT BE DISABLED USING THE MESSAGE CENTER
Introduction

NOTE: 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.

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 IPC over the HS-CAN3 . The IPC then 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 IPC , 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.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ABS C1109:24 Vehicle Dynamics Control Switch: Signal Stuck High Sets when the message from the IPC has been sent for too long. This is likely due to an internal failure the IPC .

Possible Sources

  • Network communication concern
  • GWM
  • IPC
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.

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.

Possible Sources

  • Charging system concern
  • EBB unit (vehicles with electric boost)
  • ABS module (vehicles with vacuum boost)
PINPOINT TEST G: REDUCED SYSTEM FUNCTION
Introduction

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).
PINPOINT TEST H: BRAKE SYSTEM FILL NOT COMPLETE

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).

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.

Possible Sources

  • Brake system has not been bled
H1 CHECK THE ABS (ANTI-LOCK BRAKE SYSTEM)DIAGNOSTIC TROUBLE CODES (DTCS)
  • Ignition ON.
  • Using a diagnostic scan tool, carry out the ABS module self-test.

Is DTC C1020:00 present?
Yes CARRY OUT the brake system bleed procedure.
REFER to: Brake System Pressure Bleeding (206-00 Brake System - General Information, General Procedures).
No The system is operating correctly at this time.

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.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ABS C0047:01 Brake Booster Pressure Sensor: General Electrical Failure Sets due to an internal failure of the brake pressure sensor.
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 C0047:31 Brake Booster Pressure Sensor: No Signal Sets when the ABS module no longer receives any signals from the pressure sensor.
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 C1013:92 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.

Possible Sources

  • Air trapped in the hydraulic system
  • External brake system leak
  • Internal EBB unit leak
  • EBB unit internal failure
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.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ABS C0078:56 Tire Diameter: Invalid/Incompatible Configuration If the tire size message sent to the ABS module from the BCM contains invalid data, 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
PINPOINT TEST BM: THE SELECTABLE DRIVE MODE OR AUTO HOLD FEATURE IS INOPERATIVE, CANNOT BE ENABLED OR DISABLED AND ABS MODULE COMMUNICATION CONCERN WITH ATCM
Introduction

Normal Operation and Fault Conditions

The selectable drive mode switch is part of the ATCM . When the drive mode switch is activated, the ATCM sends a message to the GWM over the HS-CAN2 . The GWM relays the message to the ABS module over the FD-CAN . If the ABS module does not receive any messages within a certain time frame (usually less than 1 second) or if the message contains invalid information, the ABS module sets a DTC . For information on the all messages sent to the ABS module by the ATCM , 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).

The auto hold switch is used to activate and deactivate the auto hold feature. The switch is an internal component of the ATCM . When the driver presses the auto hold switch, the ATCM sends an auto hold switch message to the GWM over the HS-CAN2 . The GWM relays the message to the ABS module over the FD-CAN . 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.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ABS P05D3:86 Driver Mode Select Switch 'A' Range/Performance: Signal Invalid Sets when the ATCM message indicates the selectable dive mode switch has been pressed for too long and is believed to be stuck.
ABS U0138:00 Lost Communication with All Terrain Control Module: No Sub Type Information Sets if the ATCM messages are missing.
ABS U0439:00 Invalid Data Received From All Terrain Control Module: No Sub Type Information Sets when the ATCM message indicates the selectable dive mode switch is faulted or not used.
ABS U0439:86 Invalid Data Received From All Terrain Control Module: Signal Invalid Sets when the ATCM message indicates the auto hold switch is faulted or not used.

Possible Sources

  • Network communication concern
  • GWM
  • ATCM
PINPOINT TEST L: ELECTRIC BRAKE BOOSTER (EBB) BRAKE FLUID LEVEL

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 C0049:7B 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
L1 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 C0049:01 present in the ABS module?
Yes
REFER to: Instrumentation, Message Center and Warning Chimes (413-01 Instrumentation, Message Center and Warning Chimes, Diagnosis and Testing).
No For DTC C0049:7B, CHECK the brake fluid level and FILL as necessary.
For all other ABS module Diagnostic Trouble Codes (DTCs), GO to the DTC Chart in this section.

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.

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
ABS C1A95:01 Wheel Speed Sensor: General Electrical Failure Sets when the ABS module detects the following conditions on 1 or more wheel speed sensor circuits; open circuit, short to voltage, short to ground. Faults on multiple wheel speed sensors also causes this DTC to set.

Possible Sources

  • Wiring, terminals or connectors
  • Wheel speed sensor
  • EBB unit (vehicles with electric boost)
  • ABS module (vehicles with vacuum boost)

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.

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
ABS C1A95:01 Wheel Speed Sensor: General Electrical Failure Sets when the ABS module detects the following conditions on 1 or more wheel speed sensor circuits; open circuit, short to voltage, short to ground. Faults on multiple wheel speed sensors also causes this DTC to set.

Possible Sources

  • Wiring, terminals or connectors
  • Wheel speed sensor
  • EBB unit (vehicles with electric boost)
  • ABS module (vehicles with vacuum boost)

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 HILL START ASSIST FEATURE IS INOPERATIVE

Normal Operation and Fault Conditions

The hill start assist feature is configured in the IPC . The IPC sends the hill start configuration information in a message during module wake up (ignition ON). The hill start feature cannot be turned on and off. If the hill start assist feature is inoperative, then the IPC has not been correctly configured or there is a network communication error.

Verify the IPC has been configured correctly. REFER to: Module Configuration - System Operation and Component Description (418-01A Module Configuration, Description and Operation).

Retrieve and diagnose all communication Diagnostic Trouble Codes (DTCs) from the IPC . REFER to: Instrument Panel Cluster (IPC) - System Operation and Component Description (413-01 Instrumentation, Message Center and Warning Chimes, Description and Operation).

Possible Sources

  • Network communication concern
  • IPC concern
Diagnostic steps are not provided for this symptom or DTC.  REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).
PINPOINT TEST P: PATS TARGET IDENTIFIER
Introduction

Normal Operation and Fault Conditions

The ABS module and BCM share a secret code (target identifier) when the ignition is set to ON. This code is generated during the PATS programming procedure. If either a new BCM or a new ABS module has been installed, the PATS programming procedure must be carried out.

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 B10DA:51 PATS Target Identifier: Not Programmed Sets when the target identifier sent from the BCM does not match the target identifier programmed in the ABS module.

Possible Sources

  • Network communication concern
  • BCM programming error
  • ABS module programming error

Visual Inspection and Pre-checks

  • Check the vehicle repair history and determine if a new BCM or ABS module has been installed. If a new module has been installed, verify it has been programmed correctly and verify the PATS Module Initialization has been carried out using the FDRS Scan Tool PATS Application.
PINPOINT TEST LA: STEERING WHEEL SENSOR POSITION FAULTS
Introduction

Normal Operation and Fault Conditions

The steering wheel rotation sensor sends steering wheel rotation speed, angle and direction of rotation to the SCCM . The SCCM sends this information to the GWM over the HS-CAN2 , which relays the information to the ABS module over the FD-CAN . A failure of either CAN , the SCCM or the internal sensor causes the ABS module to set 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 C0051:64 Steering Wheel Position Sensor: Signal Plausibility Failure This DTC sets when the ABS module determines the steering angle message is implausible when compared to the steering angle module value (based on the yaw rate sensor information). This DTC also sets if the long term offset compensation monitoring is completed after more than 30 km (18 miles) of straight driving resulting in a long term filtered steering angle offset greater than 15 degrees.
ABS C0051:67 Steering Wheel Position Sensor: Signal Incorrect After Event Sets when the SCCM indicates the steering center position cannot be found or has been lost.
ABS C0051:85 Steering Wheel Position Sensor: Signal Above Allowable Range Sets when the total steering wheel angle is above 1,440 degrees.
ABS C0051:96 Steering Wheel Position Sensor: Component Internal Failure Sets when the steering angle sensor information from the SCCM is "invalid", "unknown" or "faulty" instead of the actual sensor information.

Possible Sources

  • Incorrectly mounted RCM
  • Network communication concern
  • Incomplete or incorrect stability control sensor calibration
  • Mismatched wheels and tires
  • Loose or worn suspension components
  • Loose or worn steering components
  • Steering wheel rotation sensor
  • Incorrectly installed SCCM
  • Incorrectly installed clockspring
  • SCCM
PINPOINT TEST R: ABS MODULE COMMUNICATION CONCERN WITH CCM
Introduction

Normal Operation and Fault Conditions

The CCM communicates with the IPMA over a private CAN . The IPMA sends the CCM 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 CCM 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 IPMA , 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 U2107:00 Collision Mitigation By Braking: No Sub Type Information This DTC sets when the collision deceleration message from the is sent too often or the duration of the message is too long.

Possible Sources

  • Network communication concern
  • CCM
PINPOINT TEST S: ABS MODULE COMMUNICATION CONCERN WITH TBM
Introduction

Normal Operation and Fault Conditions

The TBM module may also be known as the TRM .

With the ignition ON, the TBM sends messages to the GWM over the HS-CAN3 . The GWM relays these 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 TBM 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 TRM TBM , 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 U0137:00 Lost Communication With Trailer Brake Control Module: No Sub Type Information This DTC sets when the ABS module does not receive any messages from the TBM TRM within the allowed time.

Possible Sources

  • Network communication concern
  • GWM
  • TRM
PINPOINT TEST T: CONTROL MODULE IMPROPER SHUTDOWN PERFORMANCE

Normal Operation and Fault Conditions

This DTC is for informational purposes only and sets in conjunction with other ABS module Diagnostic Trouble Codes (DTCs). Retrieve and diagnose all other ABS module Diagnostic Trouble Codes (DTCs).

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ABS U3001:68 Control Module Improper Shutdown Performance: Event Information This DTC sets when the ABS module has not shut down properly. This is usually due to a loss of power before the module has shut down, such as a low battery or open circuit.

Possible Sources

  • Low battery voltage
  • Open circuit or fuse
Diagnostic steps are not provided for this symptom or DTC.  REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).
PINPOINT TEST U: NO POWER BRAKE ASSIST OR EXCESSIVE POWER BRAKE ASSIST

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 V: ABS MODULE COMMUNICATION CONCERN WITH DCMR

Normal Operation and Fault Conditions

With the ignition ON, the DCMR sends messages to the GWM over the HS-CAN1 . The GWM relays these 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 DCMR 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 DCMR , 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 U0136:00 Lost Communication With Differential Control Module - Rear: No Sub Type Information This DTC sets when the ABS module does not receive any messages from the DCMR within the allowed time.

Possible Sources

  • Network communication concern
  • GWM
  • DCMR
V1 CHECK THE COMMUNICATION NETWORK
  • Ignition ON.
  • NOTE: Diagnostic Trouble Codes (DTCs) may be displayed from previous diagnostic actions. Using a diagnostic scan tool, carry out the Network Test.

Does the DCMR pass the Network Test?
Yes RETRIEVE and RECORD all DCMR Diagnostic Trouble Codes (DTCs).
REFER to: Rear Drive Axle and Differential - Vehicles With: Electronic Limited-Slip Differential (205-02 Rear Drive Axle/Differential - Vehicles With: Ford 9.75 Inch Ring Gear, Diagnosis and Testing).
If there are no Diagnostic Trouble Codes (DTCs) in the DCMR module, GO to V3
No GO to V2

V2 CHECK THE GWM COMMUNICATION
  • Review the results of the modules communicating on the network from the previous step.

Does the GWM pass the network test?
Yes DIAGNOSE the DCMR module does not communicate with the diagnostic scan tool.
REFER to: Controller Area Network (CAN) Module Communications Network (418-00A Controller Area Network (CAN) Module Communications Network, Diagnosis and Testing).
No DIAGNOSE the GWM module does not communicate with the diagnostic scan tool.
REFER to: Controller Area Network (CAN) Module Communications Network (418-00A Controller Area Network (CAN) Module Communications Network, Diagnosis and Testing).

V3 RECHECK THE ABS MODULE DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using a diagnostic scan tool, clear the ABS module Diagnostic Trouble Codes (DTCs).
  • Ignition OFF.
  • Ignition ON.
  • Using a diagnostic scan tool, carry out the ABS module self-test.
  • Retrieve and record all ABS module Diagnostic Trouble Codes (DTCs).

Are any of the Diagnostic Trouble Codes (DTCs) in the Fault Trigger Conditions Table retrieved again?
Yes GO to V4
No The system is operating correctly at this time. The DTC was likely set due to high network traffic or an intermittent fault condition.

V4 CHECK FOR VOLTAGE DIAGNOSTIC TROUBLE CODES (DTCS) IN THE ABS MODULE
  • Review the ABS module Diagnostic Trouble Codes (DTCs) retrieved in the previous step.

Is DTC U3003:16 or U3003:17 present?
Yes For DTC U3003:16, GO to Pinpoint Test A
For DTC U3003:17, GO to Pinpoint Test F
No GO to V5

V5 RETRIEVE ALL DTCS FROM THE GWM
  • Using a diagnostic scan tool, carry out the GWM self-test.

Are any Diagnostic Trouble Codes (DTCs) present?
Yes DIAGNOSE all GWM Diagnostic Trouble Codes (DTCs).
REFER to: Controller Area Network (CAN) Module Communications Network (418-00A Controller Area Network (CAN) Module Communications Network, Diagnosis and Testing).
No GO to V6

V6 RETRIEVE ALL DTCS FROM THE DCMR
  • Using a diagnostic scan tool, carry out the DCMR self-test.

Are any Diagnostic Trouble Codes (DTCs) present?
Yes DIAGNOSE all DCMR Diagnostic Trouble Codes (DTCs).
REFER to: Rear Drive Axle and Differential - Vehicles With: Electronic Limited-Slip Differential (205-02 Rear Drive Axle/Differential - Vehicles With: Ford 9.75 Inch Ring Gear, Diagnosis and Testing).
No GO to V7

V7 CHECK FOR OTHER CAUSES OF COMMUNICATION NETWORK CONCERN

NOTE: If new modules were installed prior to the DTC being set, the module configuration can be incorrectly set during the PMI or the PMI may not have been carried out.

  • Check the vehicle service history for recent service actions related to the DCMR or the ABS module. If recent service history is found:
    • Verify the correct replacement module was installed. HVBOM may be used to verify correct part fitment.
    • Verify the configuration of replacement module was correct. Re-configure the module using as-built data if prior configuration is suspect.
    • Verify the module was not obtained from a like vehicle and installed into customer vehicle. Return the swapped module to source vehicle and obtain new replacement module.
  • Operate the system and determine if the observable symptom is still present.

Is the observable symptom still present?
Yes GO to V8
No The system is operating correctly at this time. The concern may have been due to incorrect parts replacement procedures or incorrect module configuration.

V8 CHECK FOR COMMUNICATION DIAGNOSTIC TROUBLE CODES (DTCS) IN OTHER MODULES
  • Ignition ON.
  • Using a diagnostic scan tool, carry out the Network Test.

Is U0136:xx present and active in 1 or more modules in addition to the ABS module?
Yes GO to V9
No GO to V10

V9 VERIFY DCMR OPERATION
  • Ignition OFF.
  • Disconnect all DCMR electrical connectors.
  • Disconnect all ABS module electrical connectors.
  • Disconnect all GWM electrical connectors.
  • Using a good light source, inspect all disconnected electrical connectors for the following:
    • corrosion - install new connector or terminal and clean the module pins
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
    • spread terminals - install new terminals as necessary
  • Connect all GWM electrical connectors. Make sure the connectors seat and latch correctly.
  • Connect all ABS module electrical connectors. Make sure the connectors seat and latch correctly.
  • Connect all DCMR electrical connectors. Make sure the connectors seat and latch correctly.
  • Operate the system and verify the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any service articles: TSB , GSB , SSM or FSA .
If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions.
If no services articles address this concern, INSTALL a new DCMR .
REFER to: Differential Control Module Rear (DCMR) (205-02 Rear Drive Axle/Differential - Vehicles With: Ford 9.75 Inch Ring Gear, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

V10 VERIFY ABS OPERATION
  • Ignition OFF.
  • Disconnect all DCMR electrical connectors.
  • Disconnect all ABS module electrical connectors.
  • Disconnect all GWM electrical connectors.
  • Using a good light source, inspect all disconnected electrical connectors for the following:
    • corrosion - install new connector or terminal and clean the module pins
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
    • spread terminals - install new terminals as necessary
  • Connect all GWM electrical connectors. Make sure the connectors seat and latch correctly.
  • Connect all ABS module electrical connectors. Make sure the connectors seat and latch correctly.
  • Connect all DCMR electrical connectors. Make sure the connectors seat and latch correctly.
  • Operate the system and verify the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any service articles: TSB , GSB , SSM or FSA .
If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions.
If no services articles address this concern, INSTALL a new EBB unit.
REFER to: Electric Brake Booster (EBB) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

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 X: BRAKE TEMPERATURE TOO HIGH
Introduction

Normal Operation and Fault Conditions

The ABS module continually monitors the status and condition of the ABS and stability control systems. Using the various sensor inputs, the ABS module is able to calculate the brake system temperature. Excessive brake system temperatures can lead to a brake fade condition. If the ABS module determines the brake system is overheated, a DTC is set 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 C0072:4B Brake Temperature Too High: Over Temperature Sets when the ABS module has determined the brake system is overheated. This is usually due to one or more brake calipers being partially applied (dragging).

Possible Sources

  • Parking brake partially applied
  • Brake caliper concern

Visual Inspection and Pre-checks

  • Inspect all 4 wheel ends for issues causing brake drag and repair as necessary.
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).

The U3000:XX Diagnostic Trouble Codes (DTCs) may set along with other ABS Diagnostic Trouble Codes (DTCs). Diagnose all other ABS module Diagnostic Trouble Codes (DTCs) before diagnosing any ABS module U3000:XX Diagnostic Trouble Codes (DTCs).

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ABS C101F:49 Generic Valve Failure: Internal Electronic Failure Sets when the ABS module detects an internal fault.
ABS C1A08:1C Pressure Sensor Supply: Circuit Voltage Out Of Range Sets when the ABS module detects an internal fault.
ABS U3000:00 Control Module: No Sub Type Information Sets when the ABS module detects an internal hardware fault.
ABS U3000:04 Control Module: System Internal Failures Sets when the ABS module detects an internal hardware fault.
ABS U3000:41 Control Module: General Checksum Failure Sets when the ABS module detects an internal software fault.
ABS U3000:44 Control Module: Data Memory Failure Sets when the ABS module detects an internal hardware fault.
ABS U3000:45 Control Module: Program Memory Failure Sets when the ABS module detects an internal hardware fault.
ABS U3000:47 Control Module: Watchdog/Safety µC Failure Sets when the ABS module detects an internal hardware fault.
ABS U3000:48 Control Module: Supervision Software Failure This DTC is for informational purposes only and sets in conjunction with other ABS module Diagnostic Trouble Codes (DTCs).
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 excessive temperature within the ABS module.
ABS U3000:52 Control Module: Not Activated Sets when the ABS module detects an internal software fault.
ABS U3000:96 Control Module: Component Internal Failure Sets when the ABS module detects an internal hardware fault.

Possible Sources

  • Incorrect sensor input
  • Stuck valve
  • EBB unit
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.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
ABS C05CC:00 Brake Master Cylinder Piston Position Sensor 'A' Circuit Range/Performance: No Sub Type Information Sets due to incomplete or improper module programming procedures.
ABS C05CF:00 Brake Master Cylinder Piston Position Sensor 'B' Circuit Range/Performance: No Sub Type Information Sets due to incomplete or improper module programming procedures.
ABS C102E:48 Stability Control System: Supervision Software Failure Sets due to incomplete or improper module programming procedures.
ABS P0604:8F Internal Control Module Random Access Memory (RAM) Error: Erratic Sets due to incomplete or improper module programming procedures.
ABS U2017:57 Control Module Software #2: Invalid/Incompatible Software Component Sets if the RSC calibration variant and the ABS module configuration do not match.
ABS U2017:93 Control Module Software #2: No Operation Sets if the RSC control logic cannot initialize after stable driving conditions are detected. This is usually due to an incomplete or improper module programming procedures.
ABS U2018:57 Control Module Software #3: Invalid/Incompatible Software Component Sets if the selectable drive mode software and the ABS module configuration do not match.
ABS U202B:61 In-Use Application Signing Key: Signal Calculation Failure Sets due to incomplete or improper module programming procedures. Detects a non-production bootloader file is present or an ABS module with production boot is unlocked
ABS U202B:62 In-Use Application Signing Key: Signal Compare Failure Sets due to incomplete or improper module programming procedures. Detects non-production software in the ABS module.
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.

Possible Sources

  • Incomplete programming procedure
  • Improper programming procedure
  • EBB unit
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 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 VDM 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 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 when the ABS module does not receive any messages from the VDM within the allowed time.

Possible Sources

  • Network communication concern
  • VDM
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.

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 C0031:2F 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 C0034:2F 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 C0037:2F 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: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.
ABS C1A95:64 Wheel Speed Sensor: Signal Plausibility Failure This DTC is set when the ABS module monitoring determines an implausible ABS control activation has been requested for more than 1 second.

Possible Sources

  • Tire Pressure
  • Incorrect or mismatched tire
  • Wheel speed sensor encoder contamination
  • Wiring, terminals or connectors
  • Wheel bearing
  • Wheel speed sensor encoder ring
  • Wheel speed sensor
  • EBB unit (vehicles with electric boost)
  • ABS module (vehicles with vacuum boost)
PINPOINT TEST BQ: ABS MODULE COMMUNICATION CONCERN WITH THE IPMA
Introduction

Normal Operation and Fault Conditions

With the ignition ON, the IPMA 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 circuit failure on the network or an excessive load on the network. For information on the messages sent to the ABS module by the IPMA , 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
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 .

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 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 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
  • GWM
  • 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 HS-CAN1 and FD-CAN .

When a new EBB unit or ABS module is installed, the ABS module must be programmed with the vehicle information. REFER to: Module Configuration - System Operation and Component Description (418-01A 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 BH: 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 if the absolute value of the lateral acceleration message from the RCM is outside of the maximum allowable range.
ABS C0061:64 Lateral Acceleration Sensor: Signal Plausibility Failure The ABS module creates a reference value based on all other available sensor signals and compares this value. If the 2 values differ by more than the predetermined value, this DTC is set.
ABS C0062:64 Longitudinal Acceleration Sensor: Signal Plausibility Failure Sets if the sensor signal does not match the other stability sensor signals (steering angle, yaw rate, longitudinal acceleration or lateral acceleration).
ABS C0063:28 Yaw Rate Sensor: Signal Bias Level Out Of Range/Zero Adjustment Failure Sets if the absolute value of the longitudinal acceleration message from the RCM is outside of the maximum allowable range.
ABS C0063:64 Yaw Rate Sensor: Signal Plausibility Failure Sets if the sensor signal does not match the other stability sensor signals (steering angle, yaw rate, longitudinal acceleration or lateral acceleration).
ABS C0064:28 Roll Rate Sensor: Signal Bias Level Out Of Range/Zero Adjustment Failure Sets if the sensor signal does not match the other stability sensor signals (steering angle, yaw rate, longitudinal acceleration or lateral acceleration).
ABS C0064:64 Roll Rate Sensor: Signal Plausibility Failure Sets if the sensor signal does not match the other stability sensor signals (steering angle, yaw rate, longitudinal acceleration or lateral acceleration).
ABS U0151:00 Lost Communication With Restraints Control Module: No Sub Type Information This DTC sets when the ABS module does not receive any messages from the RCM within the allowed time.
ABS U0452:02 Invalid Data Received From Restraints Control Module: General Signal Failure Sets if the yaw rate, roll rate, longitudinal acceleration or lateral acceleration messages from the RCM are invalid.
ABS U0452:41 Invalid Data Received From Restraints Control Module: General Checksum Failure Sets if the sensor checksum sent from the RCM does not match the checksum stored in the ABS module.
ABS U0452:86 Invalid Data Received From Restraints Control Module: Signal Invalid This DTC sets when the ABS module receives the yaw rate messages from the RCM , but the messages contain invalid data.

Possible Sources

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

Normal Operation and Fault Conditions

With the ignition ON, the SCCM sends messages to the GWM over the HS-CAN2 . The GWM relays these 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 SCCM 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 SCCM , 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 U0212:00 Lost Communication With Steering Column Control Module: No Sub Type Information This DTC sets when the ABS module does not receive any messages from the SCCM within the allowed time.

Possible Sources

  • Network communication concern
  • SCCM
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 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 PCM 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 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).

The TCM is an internal component of the PCM .

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: powertrain message counter, powertrain message checksum, gear lever position or REVERSE gear status.
ABS U0401:64 Invalid Data Received from ECM/PCM A: Signal Plausibility Failure This DTC sets when the ABS module receives invalid data in the driven wheel torque messages.
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, driven wheel torque message, transmission requested gear message or PARK status message.
ABS U0402:86 Invalid Data Received from TCM: Signal Invalid This DTC sets when the ABS module receives invalid data in the neutral tow command or the selectable drive mode switch type message.

Possible Sources

  • Network communication concern
  • PCM
PINPOINT TEST AJ: 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 CW: ELECTRIC BRAKE BOOSTER (EBB) BRAKE PEDAL SWITCH 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.

NOTE: This pinpoint test only applies to vehicles with an Electric Brake Booster (EBB) unit.


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

Normal Operation and Fault Conditions

The brake pedal switch is an internal component of the EBB unit and cannot be serviced separately.

When the brake pedal is pressed, the ABS module sends a signal to the PCM along 2 hardwired circuits, the ABS module also sends out brake pedal position and pressure messages on the CAN . The ABS module monitors both brake pedal output circuits, if a circuit fault is detected such as a short to ground or an open circuit, 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 C0040:01 Brake Pedal Switch 'A': General Electrical Failure When the ABS module detects the brakelamp output signal is shorted to ground, this DTC is set.
ABS C0040:04 Brake Pedal Switch 'A': System Internal Failures When the brake pedal is pressed and the ABS module detects a low output, the switch is ON but switch feedback indicates OFF, the switch is OFF but switch feedback indicates ON, or the switch is deactivated due to overload detection but feedback current is detected by the ABS module.
ABS C0040:64 Brake Pedal Switch 'A': Signal Plausibility Failure This DTC sets if the brake pedal messages from the PCM indicate the brake pedal is not being pressed, but brake hydraulic pressure indicates otherwise.
ABS C0041:01 Brake Pedal Switch 'B': General Electrical Failure When the ABS module detects the brakelamp output signal is shorted to ground, this DTC is set.
ABS C0041:14 Brake Pedal Switch 'B': Circuit Short To Ground Or Open When the ABS module detects the brakelamp output signal is shorted to voltage, this DTC is set.
ABS C0041:4B Brake Pedal Switch 'B': Over Temperature Sets when the ABS module has calculated a possible over-termperature condition in the EBB unit.

Possible Sources

  • Wiring, terminals or connectors
  • EBB unit
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 enables the auto hold feature, but does not activate auto hold. When the switch is pressed, the module 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
  • HVAC module concern
  • ABS module
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 .

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.
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.

Possible Sources

  • Incorrect sensor input
  • Air trapped in the hydraulic system
  • EBB unit
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.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
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.

Possible Sources

  • ABS Calibration routine not carried out
  • RCM concern
  • EBB unit
PINPOINT TEST CL: ABS MODULE COMMUNICATION CONCERN WITH APIM
Introduction

Normal Operation and Fault Conditions

With the ignition ON, the APIM sends messages to the GWM over the HS-CAN3 . The GWM relays these 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 APIM 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 APIM , 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 U0253:00 Lost Communication With Accessory Protocol Interface Module: No Sub Type Information This DTC sets when the ABS module does not receive any messages from the APIM within the allowed time.
ABS U0554:86 Invalid Data Received From Accessory Protocol Interface Module: Signal Invalid This DTC sets when the ABS module receives messages from the APIM , but the messages contain invalid data.

Possible Sources

  • Network communication concern
  • GWM
  • APIM
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.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
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 EBB unit.
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.

Possible Sources

  • Fuses
  • Wiring, terminals or connectors
  • EBB unit
PINPOINT TEST AQ: CRUISE CONTROL BRAKING FAULT
Introduction

Normal Operation and Fault Conditions

The CCM communicates with the IPMA over a private CAN . The IPMA sends the CCM messages to the GWM over the HS-CAN2 . The GWM relays these 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 CCM 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 IPMA , 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
PINPOINT TEST AR: ABS MODULE COMMUNICATION CONCERN WITH IPC OR THE HILL DESCENT CONTROL FEATURE IS INOPERATIVE
Introduction

Normal Operation and Fault Conditions

With the ignition ON, the IPC sends messages to the GWM over the HS-CAN3 . The GWM relays these 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 IPC 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 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).

When the driver activates or deactivates the hill descent control system through the message center, the APIM sends a hill descent control message to the IPC over the HS-CAN3 . The IPC then sends a message over the HS-CAN3 to the GWM which relays the hill descent message to the ABS mode over the FD-CAN . When the IPC receives the message, the module illuminates the hill descent control indicator. The ABS module takes the necessary action depending on the switch inputs and hill descent control message.

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.
ABS U0423:00 Invalid Data Received from Instrument Panel Cluster Control Module: No Sub Type Information This DTC sets when the ABS module receives messages from the IPC , but the messages contain invalid data.

Possible Sources

  • Network communication concern
  • GWM
  • IPC
PINPOINT TEST AS: 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, 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 AT: THE ABS MODULE DOES NOT RESPOND TO THE DIAGNOSTIC SCAN TOOL

Normal Operation and Fault Conditions

With the ignition ON, the diagnostic scan tool communicates with the ABS module over the FD-CAN . Communications can be interrupted by a wiring condition such as a short to ground, a short to voltage or an open circuit; module failure is also a cause of no communication.

Possible Sources

  • Fuses
  • Wiring, terminals or connectors
  • ABS module
AT1 VERIFY THE NO COMMUNICATION DIAGNOSTICS HAVE BEEN PERFORMED
  • Diagnostics in Workshop Manual Section 418-00 MUST BE CARRIED OUT before continuing with this pinpoint test.

Has the appropriate pinpoint test in Workshop Manual Section 418-00 been carried out for the no communication concern?
Yes CHECK OASIS for any service articles: TSB , GSB , SSM or FSA .
If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions.
If no service articles address this concern, INSTALL a new EBB unit
REFER to: Electric Brake Booster (EBB) (206-09 Anti-Lock Brake System (ABS) and Stability Control, Removal and Installation).
No CARRY OUT the ABS module does not respond to the diagnostic scan tool pinpoint test.
REFER to: Controller Area Network (CAN) Module Communications Network - System Operation and Component Description (418-00A Controller Area Network (CAN) Module Communications Network, Description and Operation).

PINPOINT TEST AU: ABS MODULE COMMUNICATION CONCERN WITH AWD MODULE
Introduction

Normal Operation and Fault Conditions

The AWD module may also be known as the TCCM .

With the ignition ON, the AWD 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 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 U0102:00 Lost Communication with Transfer Case Control Module: No Sub Type Information Sets if the AWD module messages are missing.
ABS U0403:00 Invalid Data Received From Transfer Case Control Module: No Sub Type Information Sets if the information in one or more messages from the AWD module contain invalid or out of range information.

Possible Sources

  • Network communication concern
  • AWD module
PINPOINT TEST AV: ABS MODULE COMMUNICATION CONCERN WITH GSM
Introduction

Normal Operation and Fault Conditions

With the ignition ON, the GSM 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 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.

Possible Sources

  • Network communication concern
  • GSM

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

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    Electric Brake Booster (EBB). Removal and Installation

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    NOTICE: Suspension fasteners are critical parts that affect the performance of vital components and systems. Failure of these fasteners may result in major service expense. Use the same or equivalent parts if replacement is necessary. Do not use a replacement part of lesser quality or substitute design. Tighten fasteners as specified.

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