Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information CPM-U300017

Condition
The combustion preheater module (CPM) checks its own system voltage.
The diagnostic trouble code is stored if the control module detects:
- Voltage too high.
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
- Battery charger or starter unit with faulty charge voltage connected.
- Damaged charging system.

Fault symptom[s]
- Poor heating in compartment
- Parking heater does not operate