Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information PBM-U000100

Condition
The control modules transmit and receive information via a standardized serial communication method - CAN (Control Area Network).
The diagnostic trouble code (DTC) is stored if the control module detects that:
- Communication on the CAN network is interrupted by another control module on the CAN network or by the control module's own message causing interference on the CAN network.
The control module's test for the diagnostic trouble code (DTC) starts in the event of:
- Starting the control module's CAN communication.

Note! The control module can only detect the fault once the test has been started and the diagnostic trouble code (DTC) is stored when the conditions are met. In the event of system communication problems, it is not possible to communicate with the control module. Therefore it will only be possible to read off the fault if it is intermittent.





Substitute value
- Limited functionality in the Park Brake Module (PBM) (Limp-home).

Hint: When the diagnostic trouble code (DTC) is stored, the control module responds to the diagnostic commands.

Possible source
- Short-circuit between the control area network (CAN) wiring.
- Open-circuit in the control area network (CAN) wiring.
- Internal fault in another control module in the same part of the control area network (CAN).
- Internal fault in the control module.

Fault symptom[s]
- Information lamp is on
- Message in information display
- Electrical parking brake; Reduced Functionality