Preconditions for the test:
Engine idling.
No faults stored.
No leaks in the exhaust system.
Engine temperature above 80 °C.
All electrical loads switched off.
Gear selector set to ”P/N”.
Note:
Used to check idling.
Idling, ignition advance/retard and CO value are not adjustable.
The CO value is controlled by the lambda regulation.
Procedure:
Choose the function: Idling check.
Read the operating condition. Prescribed value 1100 0010, where the second digit from the left in the block of digits corresponds to the idling contact (1=closed).
Read off the engine speed signal. Prescribed value 750-850 rpm.