Camshaft Position Sensor: Testing and Inspection

CHECKING CAMSHAFT POSITION SENSOR
^ "Camshaft Position (CMP) Sensor-G40" displayed by VAG 1551 On Board Diagnostic (OBD) program (function 02, Check DTC Memory).
^ Carry out electrical testing, test steps 2 and 23.

CHECKING VOLTAGE SUPPLY
- Disconnect 3-pin connector from Camshaft Position Sensor (G40).



- Connect Fluke 83 hand multimeter (US 1119 or equivalent) to measure voltage across disconnected plug terminals -1- and -3-, using cables from VAG 1594 adapter kit.
- Switch ignition ON.

- Multimeter: 10 Volts (minimum)

- Switch ignition OFF.
- If voltage is OK:

- Replace Camshaft Position Sensor.

- If voltage is NOT OK:

- Replace Motronic Engine Control Module (ECM) (J220).

FUNCTIONAL CHECK
- Remove fuse 18 (S18).



- Bridge connector and Camshaft Position Sensor using VAG 1315A/4 adapter cable.
- Connect VAG 1527B voltage tester (LED test light) to test connectors -2- and -3-, using cables from VAG 1594 adapter kit.
- Operate starter.

NOTE:
- LED must flicker.

- If necessary replace Camshaft Position Sensor.