Intake Manifold Runner Position Sensor, Checking: Notes

Special tools and workshop equipment required

Test requirements

The Engine Control Module (ECM) - J623- fuses OK.
Battery voltage at least 12.5 volts.
All electrical consumers such as, lights and rear window defroster, switched off.
Vehicles with automatic transmission, shift selector lever into position "P" or "N".
A/C switched off.
Ground connections between engine/transmission/chassis OK.
Ignition switched Off.

Test procedure

-- Perform a preliminary check to verify the customers complaint. Refer to diff. of measured AIR pressure PRELIMINARY CHECK

Start diagnosis

-- Disconnect the Intake Manifold Runner Position Sensor -G336- electrical harness connector -arrow-.

Fig 1: Identifying Intake Flap Motor V157/Intake Manifold Runner Position Sensor G336 Electrical Harness Connector

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Switch the ignition On.

-- Using a multimeter, check the Intake Manifold Runner Position Sensor -G336- electrical harness connector terminals 1 to 3 for voltage.

Specified value: near 5 V

-- Switch ignition Off.

Continue test according to the following table:

Value	Cause	Test
If the specified value was not obtained:	Open or shorted circuit	Checking wiring
If the specified value was obtained:	Check reference signal circuit	Check reference signal