This function is used to test the valve for variable intake manifold ("intake manifold tuning, IMT) (intake manifold runner control, IMRC)". The engine coolant temperature should be above 80°C. To reach it, start the engine and run at an engine speed between 2,500-3,500 rpm until correct temperature is reached.
Engine L4:
The IMT-valve is activated and the engine control module monitors the signal from the valve's position sensor to check if the valve has jammed.
Engine L6:
Test cycles are run on the IMT-valve and the engine control module monitors the signal from the valve's position sensor to check if the valve has jammed.
Test conditions:
Engine idling.
Do not touch the accelerator pedal during the test.
Coolant temperature above 80°C.
Parking brake applied.
Procedure:
Start the function.
Follow the instructions in the programme.
The function is done.
If the function fails, check the test conditions and repair any faults.