Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information DEM-0003

Condition




The differential electronic module (DEM) checks its voltage supply by comparing the voltage between the differential electronic module (DEM) and the central electronic module (CEM).
Diagnostic trouble code (DTC) DEM 003 is stored if the control module registers a difference in the power supply between the central electronic module (CEM) and the differential electronic module (DEM) which is greater than 2.5 V.
Diagnostic trouble code (DTC) DEM 0003 can be diagnosed with the engine running and the engine speed (RPM) >500 rpm.

Substitute value
- Four wheel drive is blocked.

Possible source

Signal too high:
- Short-circuit to supply voltage in the signal cable.

Signal too low:
- Short-circuit to ground in the signal cable
- Open-circuit in the power supply.

Fault symptom[s]
- Four wheel drive is not functioning.