Camshaft Position Sensor, Checking

Camshaft Position Sensor, Checking

Recommended Special Tools, Workshop Equipment, Testers, Measuring Instruments and Auxiliary Items
- V.A.G 1526 portable multimeter or V.A.G 1715 multimeter
- Adapter set V. A. G 1594
- Wiring diagram

Test Conditions
- The respective fuses of Motronic Engine Control Module (ECM) -J220- must be OK
- Battery voltage must be at least 11.5 V.
- All electrical consumers such as, for example, lights and rear window defroster must be switched off.
- The parking brake must be applied, otherwise the daytime running lights are switched on.
- The Ground (GND) connections between engine and body must be OK.

Test Sequence
- Disconnect 3-pin connector from Camshaft Position (CMP) sensor.







- Connect multimeter between terminal 1 (B+) and 3 (Ground -GND-) of the respective connector for camshaft position sensor for voltage measurement.
- Switch ignition on.

Specification: at least 4.5 V

- Switch off ignition.

If no voltage is present:
- Connect test box to ECM wiring harness. Test Box, Connecting For Wiring Test
- Check wires between test box and 3-pin connector for open circuit according to wiring diagram.
Terminal 1 + Socket 98
Terminal 2 + Socket 86
Terminal 3 + Socket 108







Wiring resistance: max. 1.5 Ohms

- Also check wires for short circuit to each other.

Specification: Infinity Ohms

If no malfunctions are found in wires and voltage was present between terminals 1 + 3:
- Replace Camshaft Position (CMP) Sensor -G40-.
- Erase DTC memory of ECM Diagnostic Mode 04 - Erase DTC Memory
- Generate readiness code Generate Readiness Code

If no malfunctions are found in wires and there was no voltage between terminals 1 + 3:
- Replace Engine Control Module (ECM)
- Erase DTC memory of ECM Diagnostic Mode 04 - Erase DTC Memory
- Generate readiness code Generate Readiness Code