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.
Automatic gearbox set to ”P/N”.
Pressure gauge not connected.
Note:
Used to check idling speed.
At basic setting, the ignition timing is locked to 12° before TDC, digital idling stabilisation is locked, the carbon canister valve is closed, the AC compressor is off, the EGR valve is closed, no engine temperature correction is applied and adaption values are set to 0.
Procedure:
Choose the idling check function.
Required values at test: Idling rpm signal 650-750 rpm (750-850 rpm for vehicles without AC).