With Generic Scan Tool

Camshaft Position (CMP) sensor, checking

Recommended special tools and equipment
- V.A.G 1526 multimeter or V.A.G 1715 multimeter
- V.A.G 1594 Connector test set
- 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 connectors from Camshaft Position (CMP) sensors. The locations of the Camshaft Position (CMP) sensors are as follows:
A - Cylinder bank 1 Camshaft Position (CMP) Sensor -G40- Right front cylinder head
B - Cylinder bank 2 Camshaft Position (CMP) Sensor 2 -G163- Left rear cylinder head

NOTE:
- Cylinder bank 1 = in driving direction, right
- Cylinder bank 2 = in driving direction, left
- Before disconnecting harness connectors, mark allocation to component.






- Connect multimeter between terminal 1 (B+) and 3 (Ground -GND-) for voltage measurement for the respective connector for Camshaft Position (CMP) sensor.
- Switch ignition on.
Specified value: at least 9.0 V
- Switch ignition off.

If there is no voltage:
0- Connect test box to control module wiring harness, connect test box for wiring test. Test Box, Connecting For Wiring Test






- Check wires between test box and 3-pin connector for open circuits according to wiring diagram.
Wire resistance: max: 1.5 Ohms

Vehicles with engine code AHA





Vehicles with engine code ATQ





Continuation for all vehicles
- 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 the respective Camshaft Position (CMP) sensor:
- Camshaft Position (CMP) Sensor -G40-cylinder bank 1, item 18
- Camshaft Position (CMP) Sensor 2 -G163-cylinder bank 2, item 13

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