Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information CEM-B112C87

Condition
The Central Electronic Module (CEM) both transmits and receives information via a standardized serial communication method - LIN (Local Interconnect Network).
The diagnostic trouble code (DTC) is stored if the control module detects that:
- Communication with Movement sensor (IMS) is lost for more than 1 second.
The control module's test for the diagnostic trouble code (DTC) starts in the event of:
- Activation of the alarm function.

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 on voltage feed to Movement sensor (IMS).
- Open circuit on the ground cable to Movement sensor (IMS).
- Contact resistance in the terminals.
- Leaking battery acid in Siren control module (SCM) causes interference in the LIN-net.
- Movement sensor (IMS) not working.

Fault symptom[s]
- No alarm from sensor
- Message in information display