Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information CEM-DD52

Condition




The Central Electronic Module (CEM) both transmits and receives information via a standardized serial communication method - LIN (Local Interconnect Network). If the control module registers serious interference, for example that the LIN communication to the audio/telephone switch is blocked, then the Diagnostic Trouble Code (DTC) is generated.
The diagnostic trouble code (DTC) can be detected when the ignition key is in position II for at least 10 seconds and the battery voltage exceeds 10.5 V.

Note! If any of the CEM trouble codes are of the type DDxx that indicate short-circuiting of any line on LIN is generated, the central electronic module (CEM) shall not be replaced. The central electronic module (CEM) is the only control module that monitors the voltage level in the LIN-cables. The central electronic module (CEM) is the only control module that can generate diagnostic trouble codes (DTC) for short-circuiting in one of the cables to ground or voltage. Central electronic module (CEM) shall only be replaced when an LIN-error has occurred, if troubleshooting in VIDA has shown that central electronic module (CEM) has an internal error.

Substitute value
- None.

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

Fault symptom[s]
- EV, Audio other/Steering wheel audio controls do not work
- EU, Cellular phone/Steering wheel cellular phone controls do not work