Camshaft Position Sensor, Checking

CAMSHAFT POSITION SENSOR, CHECKING

Special tools, testers and auxiliary items
- VAG 1598/18 test box
- Multimeter (Fluke 83 or equivalent)
- VW 1594 connector test kit
- Wiring diagram

Test sequence
- Disconnect harness connector from sensor (distributor).





- Connect multimeter to measure voltage at outer connector terminals using adapter cables from VW 1594.
- Switch ignition on.

Specification: min. 4.5 volts

- Switch ignition off.

If the specification is not attained:





- Connect VAG 1598/18 test box to ECM wiring harness.





- Check wiring for open circuits between test box and 3-pin connector, according to wiring diagram.
- Terminal 1 and test box socket 56
- Terminal 2 and test box socket 44
- Terminal 3 and test box socket 41
- Wire resistance: Max. 1.5 Ohms
- Additionally check wires for short circuits to one another.
- Terminal 3 and test box socket 44
- Terminal 3 and test box socket 56
- Terminal 2 and test box socket 56
- Specification: Infinity Ohms (no continuity)

If no wiring malfunction is detected and voltage was present between terminals 1 and 3:
- Replace distributor with CMP sensor

If no wiring malfunction is detected and no voltage was present between terminals 1 and 3:

- Replace Motronic Engine Control Module (ECM) J220