Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information CPM-3601

Condition




The diagnostic trouble code (DTC) is stored if the combustion preheater module (CPM) registers a supply voltage that is too high for more than 20 seconds. The heater cannot be activated until the diagnostic trouble code (DTC) has been erased.
The diagnostic trouble code (DTC) can be diagnosed when the heater is activated.

Substitute value
- None.

Possible source
- Damaged generator (GEN)
- Battery charger or starter unit with faulty charge voltage connected.

Fault symptom[s]
- Poor heating in the passenger compartment
- The parking heater does not operate.