Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code information BCM-U030000

Condition




The brake control module (BCM) compares its configuration ID with the signal configuration sent by the central electronic module (CEM) on the CAN network. If the configuration IDs do not match, the diagnostic trouble code is generated. It is also generated if communication between the brake control module (BCM) and the central electronic module (CEM) is interrupted.

Note! If there is an open circuit on both CAN cables, it is not possible to communicate with the brake control module (BCM). Thus, the diagnostic trouble code can only be read out if the malfunction is intermittent. When the diagnostic trouble code has been generated, the control module responds to diagnostic commands, but normal CAN communication is not possible ("Expulsion mode").

Substitute value
- Nothing.

Possible source
- The brake control module (BCM) has an incorrect configuration ID (control module not intended for this vehicle, such as a used control module with different software/hardware).
- Open circuit in the CAN cables between the brake control module (BCM) and the central electronic module (CEM).

Note! This diagnostic trouble code (DTC) is not due to an internal hardware fault in the Brake control module (BCM) and must not be remedied by replacing the control module.

Fault symptom[s]
- ABS warning light on.
- No ABS function.
- Message in the text display.