Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information CPM-B1D2715

Condition
The combustion preheater module (CPM) checks the coolant pump for the heater.
The diagnostic trouble code (DTC) is stored if the control module detects that:
- An electrical fault has occurred in the pump motor.
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
- Contact resistance and oxidation in the terminals.
- Open-circuit in the wiring.
- Short-circuit to supply voltage in the wiring.
- Damaged coolant pump.

Fault symptom[s]
- Poor heating in compartment
- Activation parking-/auxiliary heater; no function