Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information CPM-1604

Condition




The diagnostic trouble code (DTC) is stored if the control module registers an open-circuit in the cable from the water pump. The heater cannot be activated until the diagnostic trouble code (DTC) has been erased.
The diagnostic trouble code (DTC) can be diagnosed when the water pump is activated.

Substitute value
- None.

Possible source
- Open-circuit in the cable between the combustion preheater module (CPM) and the water pump
- Contact resistance, oxidation or loose connections
- Damaged water pump.

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