This function runs a self-test of the system and a predetermined number of components are activated. If the control unit detects that any of these components gives an unreasonable value, a fault code will be stored in the system. The function finished with a fault code reading where any fault codes in the system are shown.
Erase fault codes before the self-test to avoid showing historical fault codes.
Test conditions:
Battery voltage above 12 V.
Vehicle stationary.
Radio unit on, tuned to a station with good reception.
No faults in the system.
Procedure:
Start the function.
The self-test starts and components are activated one at a time.
The self-test can be cancelled with "Cancel".
When the self-test is done, an automatic fault code reading is performed.
The function is done.
If the function fails, check the test conditions and repair any faults.