Camshaft Position (CMP) Sensor, Checking

Camshaft Position (CMP) Sensor, Checking

Recommended special tools and equipment
- V.A.G 1526 portable multimeter or V.A.G 1715 multimeter
- V.A.G 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 such as, 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. connect test box for wiring test.

Vehicles with engine code AEB







- Check for open circuits in wires between test box and connector according to wiring diagram.
Terminal 1 + socket 11
Terminal 2 + socket 76
Terminal 3 + socket 67
Wire resistance: max: 1.5 ohms

Vehicles with engine code ATW, AUG, AWM







- Check for open circuits in wires between test box and connector according to wiring diagram.
Terminal 1 + socket 98
Terminal 2 + socket 86
Terminal 3 + socket 108
Wire resistance: max: 1.5 ohms

Continued for all vehicles
- Check wires for short circuit to each other.
Specified value: Infinite ohms

If no malfunctions are found in the wires and there was voltage between terminals 1+3:
- Replace Camshaft Position (CMP) sensor.
- Erase DTC memory of Engine Control Module (ECM). Diagnostic mode 4: Reset/erase diagnostic data. Diagnostic Mode 4: Reset/Erase Diagnostic Data
- Generate readiness code. Monitors, Trips, Drive Cycles and Readiness Codes

If no malfunctions are found in wires and there was no voltage between terminals 1+3:
- Replace Engine Control Module (ECM)