Pinpoint Test H: DTCs B2900 and C1805

Anti-Lock Control - Non-Hybrid

Pinpoint Test H: DTCs B2900 and C1805

Refer to Wiring Diagram Set 42, Vehicle Dynamic Systems for schematic and connector information. [1][2]Diagrams By Number

Normal Operation

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

- DTC B2900 (VIN (Vehicle Identification Number) Mismatched)- If the VIN (Vehicle Identification Number) information stored in the ABS module does not match the information transmitted by the PCM, DTC B2900 set.

- DTC C1805 (Mismatched PCM and/or ABS Module)- If the VIN (Vehicle Identification Number) information stored in the ABS module does not match the information transmitted by the PCM, DTC C1805 sets.

This pinpoint test is intended to diagnose the following:

- Module configuration (ABS and PCM)

- ABS module

PINPOINT TEST H : DTCs B2900 AND C1805

H1 VERIFY PCM VIN (Vehicle Identification Number)

- 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 (Vehicle Identification Number) in Log Viewer to the vehicle VIN (Vehicle Identification Number) plate.

Does VIN (Vehicle Identification Number) in Log Viewer match the vehicle VIN (Vehicle Identification Number) plate?

Yes
GO to H2.

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

H2 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 Information Bus. CLEAR the DTC. CYCLE the ignition key. REPEAT the self-test. Programming and Relearning

No
INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module . CLEAR the DTC. CYCLE the ignition key. REPEAT the self-test.