AF1: Verify The ABS Module DTC

Ignition ON, engine OFF.
Clear the ABS DTCs.
Put the ABS module in sleep mode by performing the following steps:
- With ALL doors closed, set the ignition from ON to OFF.
- Disconnect the diagnostic scan tool.
- Open the door, exit the vehicle and close the door.
- Wait a minimum of 90 seconds for the ABS module to enter sleep mode.
Ignition ON, engine OFF.

Carry out the ABS self-test.

Are any of the DTCs listed in the Fault Trigger Conditions Table present and active in the ABS module?

Yes	No
Go to AF2.	The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.

AF2: Verify The Network Communication

Yes	No
Go to AF3.	DIAGNOSE the module not responding to the diagnostic scan tool. REFER to the Module Communications Network article.

AF3: Check For Communication DTCs

Using the recorded results from the Network Test, determine if there are any No Communication With The BCM, No Communication With The GWM, Invalid Data Received From The BCM or Invalid Data Received From The GWM DTCs present in the ABS module.
Are there any No Communication or any Invalid Data DTCs present in the ABS module?

Yes	No
DIAGNOSE all No Communication and Invalid Data DTCs in the ABS module before diagnosing this DTC. REFER to the ABS Module DTC Chart.	Go to AF4.

AF4: Configure The ABS Module Using PMI

Ignition ON, engine OFF.
Using a diagnostic scan tool, configure the ABS module using PMI. Follow all diagnostic scan tool directions.
Put the ABS module in sleep mode by performing the following steps:
- With ALL doors closed, set the ignition from ON to OFF.
- Disconnect the diagnostic scan tool.
- Open the door, exit the vehicle and close the door.
- Wait a minimum of 90 seconds for the ABS module to enter sleep mode.
Ignition ON, engine OFF.
Clear the ABS DTCs.
Put the ABS module in sleep mode by performing the following steps:
- With ALL doors closed, set the ignition from ON to OFF.
- Disconnect the diagnostic scan tool.
- Open the door, exit the vehicle and close the door.
- Wait a minimum of 90 seconds for the ABS module to enter sleep mode.
Ignition ON, engine OFF.

Carry out the ABS self-test.

Are any of the DTCs listed in the Fault Trigger Conditions Table present and active in the ABS module?

Yes	No
Using a diagnostic scan tool, PROGRAM the BCM using PMI. FOLLOW all scan tool directions. REFER to the Module Configuration article.	The system is operating correctly. The concern was caused by an incomplete or improper programming session.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Possible Causes