Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information CPM-B1D3468

Condition
The combustion preheater module (CPM) checks the function of the heater.
The diagnostic trouble code (DTC) is stored if the control module detects that:
- A severe function fault has been detected.
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.

Note! The heater cannot be activated until the diagnostic trouble code (DTC) has been erased.

Possible source
- Damaged heater.

Note! Check to see if any other diagnostic trouble codes (DTCs) are stored. Fault-trace and remedy these diagnostic trouble codes (DTCs) first.

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