Camshaft Position Sensor: Testing and Inspection

CHECKING CAMSHAFT POSITION SENSOR

Checking Voltage Supply
- Disconnect Camshaft Position (CMP) sensor harness connector at ignition distributor.





- Switch Fluke 83 multimeter to 20 Volt range.
- Connect multimeter to outer terminals of connector using jumper wires from VW 1594 adaptor kit.
- Switch ON ignition.

NOTE: Must be 10 Volts minimum.

- If NO:

- Switch OFF ignition.
- Replace Engine Control Module (ECM) J169.

Checking Function
- Disconnect cold start valve harness connector.
- Disconnect fuel injector harness connector at fuel rail.
- Slide up the rubber boot on the Camshaft Position sensor harness connector (at ignition distributor).
- Re-connect Camshaft Position sensor connector.





- Connect VAG 1527B LED tester to center terminal, and brown/white outer wire of Camshaft Position sensor connector (while connected) using jumper wires from the VW 1594 adaptor kit.
- Operate starter.

NOTE: LED tester must flicker.

- If LED does not flicker:

- Replace Camshaft Position sensor.