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 standardised 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.
- Movement sensor (IMS) not working.
- Open circuit or short-circuiting on LIN-bus to movement sensor (IMS).

Fault symptom[s]
- 7T, Alarm/Alarm will not set off/No visible and/or audible signal
- IV, Text window and warning symbol/Text message
- XM, Alarm/Other alarm problems