This function is used to activate the algorithm for crankshaft position variation learning, which calculates correction factors reference pulse for misfire diagnostics.
Test conditions:
Engine on.
Place the gear lever in park or neutral.
Parking brake applied.
Lock the drive wheels.
Engine temperature above 40°C.
Air conditioning off.
Procedure:
Start the function.
If the function fails, check the test conditions and repair any faults.