Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information CEM-5F3C

Condition




The central electronic module (CEM) checks the communication with the combustion preheater module (CPM).
The diagnostic trouble code (DTC) is stored if the central electronic module (CEM) registers that the signal in the circuit for the combustion fan is too high.
The diagnostic trouble code (DTC) can be diagnosed when the heater is activated.

Substitute value
- None.

Possible source
- Short-circuit to supply voltage in the signal cable
- Damaged combustion fan.

Fault symptom[s]
- Poor heating in the passenger compartment.