Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information CEM-DF01

Condition




The central electronic module (CEM) checks the voltage in CAN H in the low speed network.
The diagnostic trouble code (DTC) is stored if the central electronic module (CEM) registers an open-circuit in CAN H in the low speed network.
The diagnostic trouble code (DTC) can be diagnosed with the ignition in positions I or II.

Note! The central electronic module (CEM) is the only control module that monitors the voltage level in CAN H. The central electronic module (CEM) is hence the only control module that can directly store a diagnostic trouble code (DTC) for an open-circuit in this conductor. On the other hand, other control modules can store diagnostic trouble codes (DTCs) as a result of the open-circuit. Do not replace the central electronic module (CEM) in the event of a CAN fault unless VIDA fault-tracing has indicated that the central electronic module (CEM) has an internal fault.

Substitute value
- None.

Possible source
- Open-circuit in CAN H in the low speed network
- Contact resistance in the terminals.

Fault symptom[s]
- No gauges are working
- The lighting in the instrument panel does not function
- The central locking system does not function at all.