Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information CEM-U023187

Condition
The Central Electronic Module (CEM) both transmits and receives information via a standardised serial communication method - LIN (Local Interconnect Network).
The diagnostic trouble code (DTC) is stored if the control module detects that:
- No communication with the Rain sensor module (RSM).
The control module's test for the diagnostic trouble code (DTC) starts in the event of:
- Ignition switch position I and II.

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.





Substitute value
- None.

Possible source
- Open-circuit in the power supply to the rain sensor module (RSM).
- Open-circuit in the ground lead to the rain sensor module (RSM).
- Contact resistance in the terminals.
- Leaking battery acid in Siren control module (SCM) causes interference in the LIN-net.
- Rain sensor module (RSM) not functioning.

Note! The cause of the fault can lie in the LIN network for the Interior movement sensor (IMS), Heartbeat sensor (HBS) and the Siren control module (SCM)

Fault symptom[s]
- Rain sensor fail to work