Diagnostic Trouble Code (DTC) Information CPM-U002808
Condition
The combustion preheater module (CPM) checks the communication on the communication cable to the remote start system (accessory).
The diagnostic trouble code (DTC) is stored if the control module detects:
- No communication
The control module's test for the diagnostic trouble code (DTC) starts in the event of:
- Heater started.
NOTE:
The control module can only detect the fault once the test has been started and the diagnostic trouble code (DTC) is stored when the conditions are met.
Substitute Value
- Heater's function blocked.
Possible Source
- Damaged connector and/or oxidation in connections.
- Damaged control module.
Fault symptom[s]
- Parking heater/Does not work
- Temperature control/Heater not hot enough in rear section
- Temperature control/Heater not hot enough in front section
- Temperature control/Heater does not work
- Temperature control/Heater slow to heat in rear section
- Temperature control/Heater slow to heat in front section