Test driving and reading off diagnostic trouble codes (DTCs)

After changing tire and/or new software has been downloaded in the control module, the vehicle shall be test-driven and then read out with VIDA. Before test-driving, connect VIDA and read out parameter "Number of detections of malfunction condition" via CARCOMMUNICATION/Parameters. Note the quantity.

Test-drive the vehicle and fulfill the following criteria at the same time at least once:

• Constant vehicle speed (above 20 km/h).
• Constant engine RPM.
• Brake pedal released (no braking).
• Engine brake not active (accelerator pedal pressed down).

After test-driving:

Connect VIDA and read out parameter "Number of detections of malfunction condition" via CARCOMMUNICATION/Parameters. Compare the number before and after test-driving, if the number of "detections of malfunction condition" is higher after test-driving it indicates that Differential electronic module (DEM) has detected "incorrect engagement" of four-wheel drive.

The parameter "Number of detections of malfunction condition" is only counted up once per driving cycle if "incorrect engagement" is detected.

Has the counter counted up after test-driving? 

• YES 

  Refer to Information 

• NO 

  Refer to Information