Pinpoint Test G: DTCs B2900 And C1805
Anti-Lock Control
Pinpoint Tests
Pinpoint Test G: DTCs B2900 and C1805
Normal Operation
When the ignition is turned to the RUN position, the ABS module and the PCM share the Vehicle Identification Number (VIN) over the High Speed Controller Area Network (HS-CAN) bus.
- DTC B2900 VIN Mismatched - If the VIN stored in the ABS module does not match the VIN transmitted by the PCM, DTC B2900 will set.
- DTC C1805 Mismatched PCM and/or ABS-TC Module - If the powertrain information sent from the PCM to the ABS module over the HS-CAN bus does not match the powertrain information stored in the ABS module or if the ABS module cannot receive PCM network messages due to a network concern, DTC C1805 will set.
This pinpoint test is intended to diagnose the following:
- Module configuration (ABS and PCM)
- ABS module
PINPOINT TEST G: DTCs B2900 AND C1805
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G1 VERIFY PCM 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 on the vehicle.
- Does the VIN in Log Viewer match the vehicle VIN plate?
Yes
GO to G2.
No
RECONFIGURE the PCM. FOLLOW the instructions on the scan tool. CLEAR the DTCs. CYCLE the ignition key. REPEAT the self-test.
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G2 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 Service and Repair. CLEAR the DTC. CYCLE the ignition key. REPEAT the self-test.
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