Pinpoint Test AF: Abs Module VIN Mismatch
- Normal Operation and Fault Conditions
With the ignition ON, the BCM sends the VIN message to the GWM over the HS-CAN1. The GWM relays this 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.
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 .
DTC Fault Trigger Conditions
DTC Description Fault Trigger Condition ABS U3002:51 Vehicle Identification Number: Not Programmed Sets when the VIN has not been programmed in the ABS module. 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 Causes
- BCM configuration
- ABS module configuration
- AF1 VERIFY THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE DTC (DIAGNOSTIC TROUBLE CODE)
- Ignition ON.
- Clear the ABS DTC's.
- 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.
- Carry out the ABS self-test.
Are any of the DTC's listed in the Fault Trigger Conditions Table present and active in the ABS module?
Yes GO to AF2 No The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition. - AF2 VERIFY THE NETWORK COMMUNICATION
- Ignition ON.
- Using a diagnostic scan tool, carry out the Network Test.
- Recorded all No Communication and Invalid Data DTC's.
Do all equipped modules communicate with the diagnostic scan tool?
Yes GO to AF3 No DIAGNOSE the module not responding to the diagnostic scan tool. REFER to: Communications Network in the appropriate 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 DTC's present in the ABS module.
Are there any No Communication or any Invalid Data DTC's present in the ABS module?
Yes DIAGNOSE all No Communication and Invalid Data DTC's in the ABS module before diagnosing this DTC. REFER to the Diagnostic Trouble Code (DTC) Chart . No GO to AF4 - AF4 CONFIGURE THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE USING PMI (PROGRAMMABLE MODULE INSTALLATION)
- Ignition ON.
- 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.
- Clear the ABS DTC's.
- 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.
- Carry out the ABS self-test.
Are any of the DTC's listed in the Fault Trigger Conditions Table present and active in the ABS module?
Yes Using a diagnostic scan tool, PROGRAM the BCM using PMI. FOLLOW all scan tool directions. REFER to: MODULE PROGRAMMING . Using a diagnostic scan tool, PROGRAM the PCM using PMI. FOLLOW all scan tool directions. REFER to: MODULE PROGRAMMING . No The system is operating correctly. The concern was caused by an incomplete or improper programming session.