System test

Special diagnosis routines can be run with this menu item.

The following conditions must be observed for the system test:

Vehicle speed < 10 km/h

Engine start detected and 10 seconds elapsed since engine start

Terminal 15 supply voltage OK

5-volt supply voltage OK

Engine temperature < 110 °C

Outside temperature > 3 °C

The following tests are performed:

Display of all segments in the control module

The drive motors are traversed across the entire range once

The measured positioning travel is subjected to a plausibility test and stored as a fault

Two different voltage values are set on the fresh-air blower and tested

The VC circuit is tested via the DME

All fault paths are tested, and any faults

After the system test, the heating/air conditioning reverts to the state it was in before the test.

Do It Yourself Car Diagnosis

Do It Yourself Car Diagnosis

Don't pay hundreds of dollars to find out what is wrong with your car. This book is dedicated to helping the do it yourself home and independent technician understand and use OBD-II technology to diagnose and repair their own vehicles.

Get My Free Ebook


Post a comment