48B1

48B1-VARIANT CODING-VERSION NOT CORRECT/SUPPORTED BY VEHICLE

For a complete wiring diagram consult Diagrams/Electrical Electrical Diagrams


Theory of Operation


The messages sent on the CAN bus are distinguished by an identifier (ID). Each CAN ID is defined to contain a certain number of bytes. The Anti-Lock Brake Module verifies that it has received the proper number of bytes for each ID.


- When Monitored:

Continuously with the ignition on, one valid CAN ID received at least once.

- Set Condition:

When the ABM detects an incorrect CAN ID from the BCM.








Diagnostic Test


1. CHECK FOR BCM CAN BUS DTCS

With the scan tool, read BCM DTCs.

Are there any BCM CAN BUS DTCs present?

Yes

- Diagnose and repair the DTC(s).
- Perform ABS VERIFICATION TEST. ABS Verification Test

No

- Go To 2



2. CHECK IF ECM/PCM DTCS ARE PRESENT

With the scan tool, read ECM/PCM DTCs.

Are there any ECM/PCM DTCs present?

Yes

- Diagnose and repair the DTC(s).
- Perform ABS VERIFICATION TEST. ABS Verification Test

No

- Replace the Anti-Lock Brake Module.
- Perform ABS VERIFICATION TEST. ABS Verification Test