Preconditions for the test:
Engine idling.
No faults stored.
No leaks in the exhaust system.
Engine temperature above 85 °C.
All electrical loads switched off.
Gear selector set to ”P/N”.
Throttle cable adjustment OK.
Note:
Used to check idling.
Idling, ignition advance/retard and CO value are not adjustable.
The idling speed is set by the control unit.
The CO value is controlled by the lambda regulation.
In the basic setting mode, the carbon canister valve is closed and the AC compressor is switched off.
Procedure:
Choose the function: Idling check.
Rev up the engine and let it idle for two minutes.
Read off the engine speed signal. Prescribed value 800-920 rpm.
On completion of basic setting, the carbon canister valve is activated and the AC compressor is switched on.