This function is a self test of the system, where a number of components selected by the control unit are loaded (activated). If the control unit detects an unreasonable value on any component a fault code is stored in the system. The function finishes with a reading of fault codes where possible fault codes stored in the system are displayed.
Note:
Erase fault codes before the self test to avoid that historical fault codes are displayed.
Do not activate switches or controls during the test.
Test prerequisites:
Battery voltage above 12V.
Vehicle stationary.
Engine idle running.
Parking brake applied.
Gear selector in P position.
Vehicles with diesel engine - exhaust gas temperature higher than 100 °C (212 °F).
Vehicles equipped with sport/economy-button may need to be pushed on/off during the self test.
Procedure:
Choose the function: "Self test".
The self test starts and the components are activated one by one.
The self test can be aborted by "Abort".
When the self test is finished a reading of fault codes is automatically performed.