With Generic Scan Tool

Camshaft Position (CMP) sensor, checking

Recommended special tools and equipment
- VAG 1526 multimeter or VAG 1715 multimeter
- VAG 1594 connector test kit
- Wiring diagram

Test requirements






- The respective fuses of Motronic Engine Control Module (ECM) -J220- must be OK.
- Battery voltage must be at least 11.5 volts.
- All electrical consumers like, for example, lights and rear window heating must be switched off.
- Parking brake must be engaged or else daylight driving lights will be switched on.
- Ground (GND) connections between engine and chassis must be OK.

Test sequence






- Disconnect 3-pin connector -1- from Camshaft Position (CMP) sensor -2-.

- Connect multimeter to terminal 1 (B+) and 3 (Ground -GND-) of the respective connector for Camshaft Position (CMP) sensor for voltage measurement.

- Switch ignition on.

Specified value: at least 4.5 V

- Switch ignition off.

If there is no voltage:

- Connect test box to control module wiring harness.

- Check wires between test box and 3-pin connector for open circuits according to wiring diagram.






Wire resistance: max: 1.5 Ohms






- Also check wires for short circuit to each other.

Specified value: Infinity Ohms

If no malfunctions are found in the wires and there was voltage between terminals 1 & 3:

- Replace Camshaft Position (CMP) Sensor 2 -G40-.

- Erase DTC memory of Engine Control Module (ECM).

- Generate readiness code.

If no wiring faults are found and there was no voltage between terminals 1 & 3:

- Replace Engine Control Module (ECM).