Passat L4-1984cc 2.0L DOHC (9A) (1990)
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Ignition Reference Sensor: Testing and Inspection
Ignition Reference Sensor
Ignition Reference Sensor
1.
With the ignition "OFF", disconnect the ignition reference sensor harness connector.
2.
Connect a suitable volt/ohm meter between terminals 1 and 2 of the ignition reference sensor.
Measure the resistance between terminal 1 and 2.
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The correct measurement should be less than 2 ohms.
3.
Measure the resistance between terminal 1 and ground.
4.
Measure the resistance between terminal 2 and ground.
^
The correct measurement should be infinite ohms.
5.
If the correct measurements are not obtained the sensor is defective. Replace the reference sensor