Diagnostic Trouble Code (DTC) Information DEM-P163568
Condition
This diagnostic trouble code (DTC) status is an event controlled diagnostic trouble code (DTC). An event controlled diagnostic trouble code (DTC) does not mean that there is a fault in the control module when it is active, but is designed as information.
Differential electronic module (DEM) checks engagement and disengagement of four-wheel drive. The control module controls engagement and disengagement using a number of parameters, among others, by comparing speed of the wheels. If the vehicle's tires are worn unevenly (compared front and rear, or if a tire with incorrect dimension is installed (compared with the vehicle's other tires) on the vehicle's front or rear axle, this may result in incorrect engagement of four-wheel drive.
The diagnostic trouble code (DTC) is stored if the control module detects that:
- Any of the wheels on the front or rear axle rotate faster than other wheels when driving on straight road with constant throttle application.
The control module's test for the diagnostic trouble code (DTC) starts in the event of:
- Constant vehicle speed (above 20 km/h).
- Constant engine RPM.
- Brake pedal released (no braking).
- The parking brake is not applied.
- Engine brake not active (accelerator pedal pressed down).
Substitute Value
- Reduced function of four-wheel drive.NOTE:
In case of heavy wheel spin, the four-wheel drive is engaged even if a diagnostic trouble code is generated.
Possible Source
- Unevenly worn tires (compared front and rear).
- Tire with incorrect dimension has been installed on front or rear axle (compare with other tires on the vehicle).
Fault symptom[s]
- Jerks and hacks may be felt in the vehicle when driving on straight road with constant throttle application, especially on roads with slight downhill grade.