Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information DEM-P188918

Condition
The Differential electronic module (DEM) checks the performance of the oil pressure pump. The control module compares the signal from the oil pump to the predefined parameters. The current that goes through the oil pressure pump is dependent on the temperature of the oil.
The diagnostic trouble code (DTC) is stored if the control module detects that:
- The amperage through the oil pressure pump is too low.
- The voltage across the oil pressure pump is greater than 6 V.
- Incorrect value lasts longer than 25 seconds.
The control module's test for the diagnostic trouble code (DTC) starts when:
- Driving.
- The oil temperature is above 0 °C.

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
- Four wheel drive is disconnected while the fault exists.

Possible source
- Damaged connector between oil pressure pump and Differential electronic module (DEM).
- Short-circuit to ground in the power supply cable.
- Oil level too low.
- Damaged oil pressure pump.
- Damaged safety valve/overflow valve.

Fault symptom[s]
- MU, 4-wheel/all wheel drive/Does not work
- IV, Text window and warning symbol/Text message