Golf L4-1781cc 1.8L SOHC (RV) (1990)
Air Flow Meter/Sensor: Testing and Inspection
Air Flow Sensor
1.
With the ignition switch "OFF" remove the harness connector at the air flow sensor.
2.
Connect a suitable volt/ohm meter between terminal 3 and 4 of the air flow sensor plug and measure the resistance.
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The correct measurement should be approx. 500 to 1000 ohms
3.
Disconnect the intake boot.
4.
Connect the volt/ohm meter between terminal 2 and 3 of the air flow sensor plug. Measure the resistance while moving the air flow sensor flap.
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The resistance should change as the flap is moved.
NOTE: If the flap binds or sticks when moved, replace the air flow sensor.
If the correct measurements are not obtained, the air flow sensor is defective. Replace the air flow sensor.