Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information DEM-U03004A

Condition
The Differential electronic module (DEM) checks the configuration in the connector to the differential unit (AOC unit).

Note! A control module from another make of vehicle with a similar four wheel drive system can be incorrectly installed in a Volvo.

The diagnostic trouble code (DTC) is stored if the control module detects that:
- The connector in the control module does not have the correct configuration.
The control module's test for the diagnostic trouble code (DTC) starts in the event of:
- Ignition on.





Substitute value
- Four wheel drive is disengaged.

Possible source

- Incorrect Differential Electronic Module (DEM).

Fault symptom[s]
- All wheel drive doesn't work