Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information CPM-U1A3787

Condition
The combustion preheater module (CPM) receives a message that a collision has occurred and switches off the heater.
The diagnostic trouble code (DTC) is stored if the control module detects that:
- A collision signal is received.
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
- Crash event received

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

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