Pinpoint Test B: DTC B2900

Anti-Lock Control

Pinpoint Tests

Pinpoint Test B: DTC B2900

Refer to Wiring Diagram Set 42, Vehicle Dynamic Systems for schematic and connector information. Diagrams By Number

Normal Operation

When the ignition is turned to the RUN position, the ABS module and the Body Control Module (BCM) share Vehicle Identification Number (VIN) information over the High Speed Controller Area Network (HS-CAN).

- DTC B2900 ( VIN Mismatch) - this DTC sets in the ignition cycle if the VIN information stored in the ABS module does not match the information transmitted by the BCM. DTCs set in the ignition cycle can only be cleared by cycling the ignition off and on once the fault has been corrected.

This pinpoint test is intended to diagnose the following:
- Module configuration (ABS and BCM)
- ABS module

PINPOINT TEST B: DTC B2900

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B1 VERIFY BCM VIN

- Connect the scan tool.
- Ignition ON.
- Using the scan tool, carry out the network test.
- Enter the following diagnostic mode on the scan tool: Log Viewer.
- Compare the VIN in log viewer to the VIN plate.
- Does VIN in log viewer match the VIN plate?

Yes
GO to B2.

No
RECONFIGURE the BCM. FOLLOW the instructions on the scan tool. CLEAR the DTCs. CYCLE the ignition key. REPEAT the self-test.

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B2 VERIFY ABS MODULE PART NUMBER

- Retrieve and record the ABS module part number from log viewer and verify that the vehicle has the correct ABS module installed.
- Is the correct ABS module installed in the vehicle?

Yes
CONFIGURE the ABS module. REFER to Programmable Module Installation (PMI) Using the Integrated Diagnostic System (IDS) When the Original Module is NOT Available in Module Configuration Programmable Module Installation (PMI). CLEAR the DTC. CYCLE the ignition key. REPEAT the self-test.

No
INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module Service and Repair. CLEAR the DTC. CYCLE the ignition key. TEST the system for normal operation.

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