Air Flow Sensor Plate Position Sensor: Adjustments

1. Remove the intake air boot.

Air Flow Sensor Plate Potentiometer Location:

2. Remove the potentiometer harness connector.

Air Flow Sensor Plate Potentiometer Adjustment:

3. Loosen the mounting screws enough to move (adjust) the potentiometer.

Air Flow Sensor Plate Test Connection:

4. Install test harness VW 1501 or equivalent between the potentiometer electrical plug and the CIS-E harness connector.
5. Switch the ignition "ON".

Air Flow Sensor Plate Adjustment:

6. Lift the air flow sensor plate until it is flush with the narrowest point in the air cone. Using a suitable device (VW 1348/1), maintain this position.
7. Connect a suitable volt meter between terminal 2 and 3 of the test harness.
8. Adjust the potentiometer position to obtain 0.02 to 0.2 volts and secure the mounting screws.
. 9. Raise the air flow sensor plate to it highest position.

^ The voltage should increase to approx. 7 volts.

If the correct measurement is not obtained, check the rest position of the sensor plate, Refer to FUEL SYSTEMS and repeat the adjustment procedure.

10. Seal the mounting screws with paint.