Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information CPM-3702

Condition




The diagnostic trouble code (DTC) is stored if the combustion preheater module (CPM) registers a supply voltage that is too low 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
- Poorly charged battery
- Contact resistance in the control module terminals
- Blown fuse.

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