With Manufacturer's Scan Tool

Camshaft Position (CMP) Sensor, Checking

Special tools and equipment
- VAG1598/22 test box
- Multimeter US1119 (Fluke 83 or equivalent)
- VW1594 connector test kit
- Wiring diagrams

Checking conditions
- Battery voltage: min. 11.5 volts

Checking






- Disconnect 3-pin harness connectors from Camshaft Position (CMP) sensors.
A - Camshaft Position (CMP) sensor 2 -G163-, cylinder bank 1, right front
B - Camshaft Position (CMP) sensor -G40-, cylinder bank 2, left rear






- Connect multimeter US1119 (Fluke 83 or equivalent) to measure voltage across CMP connector terminals 1 (B+) and 3 (Ground), using adapters from VW1594 connector test kit.
- Switch ignition on.
- Measure voltage between terminals 1 and 3.
Specified value: min. 9.0 volts
- Switch ignition off.






- Connect VAG1598/22 test box to Motronic ECM harness connector.
- Check wiring for open circuit between ECM/test box and 3-pin harness connector, according to wiring diagram.

CMP 2 -G163-, right cylinder head, front
- Connector terminal 1 to ECM/test box socket 11
- Connector terminal 2 to ECM/test box socket 76
- Connector terminal 3 to ECM/test box socket 67
- Specified value: max. 1.5 Ohms

CMP 2 -G40-, left cylinder head, rear
- Connector terminal 1 to ECM/test box socket 11
- Connector terminal 2 to ECM/test box socket 44
- Connector terminal 3 to ECM/test box socket 14
- Specified value: max. 1.5 Ohms

- Check wiring for short circuits to one another.
- Specified value: Infinity Ohms

If wiring is OK (and voltage across terminals 1 and 3 is OK):
- Replace Camshaft Position (CMP) sensor.

If wiring is OK (but still no voltage across terminals 1 and 3):
- Replace Motronic ECM -J220-.