With Manufacturer's Scan Tool

Camshaft Position (CMP) Sensor, Checking

Special tools and equipment
- VAG 1598/31 test box
- VAG 1526 multimeter or VAG 1715 multimeter
- VAG 1594 connector test kit
- Wiring diagram

Test condition

- Battery voltage must be at least 11.5 volts.

Test sequence






- Pull off connectors on 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 -G163-
Left rear cylinder head






- Use auxiliary wires from VAG 1594 to connect multimeter with outer terminals of appropriate connector to make voltage measurement.
- Switch ignition on.
Specification: at least 5 V

- Switch ignition off.






- Connect VAG 1598/31 test box to control module wiring harness. Engine Control Module (ECM) is not connected.
- Check for breaks in wires between test box and connector (see wiring diagram).

Camshaft Position (CMP) sensor -0163- on left rear cylinder head
Terminal 1 + socket 98
Terminal 2 + socket 86
Terminal 3 + socket 108

Camshaft Position (CMP) sensor -040- on right front cylinder head
Terminal 1 + socket 98
Terminal 2 + socket 87
Terminal 3 + socket 108
Wire resistance: max. 1.5 Ohms

- Also check wires for shorts among one another.
Expected value: infinity Ohms

If no errors are found in wires and there was voltage between terminals 1 + 3:
- Replace Camshaft Position (CMP) sensor(s) item 13 or item 18.

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