With Manufacturer's Scan Tool

Camshaft Position (CMP) Sensor -G40-, Checking

NOTE: Only gold plated terminals must be used to repair the terminals in the Camshaft Position (CMP) sensor harness connector.

Special tools and equipment
- VAG1598/22 test box
- Multimeter (Fluke 83 or equivalent)
- VW1594 adapter set
- Wiring diagram

Test conditions
- Battery (B+) voltage at least 11.5 V

Test procedure
- Remove engine cover.






- Disconnect 3 pin harness connector from Camshaft Position (CMP) sensor -G40- (arrow).






- Connect multimeter to measure voltage with adapter cables from VW1594 to terminals 1 (B+) and 3 (GND) on Camshaft Position (CMP) sensor -G40- harness connector.
- Turn on ignition.
Specified value: min. 4.5 V
- Turn off ignition.

If no voltage is present:
- Remove wiper arms and plenum chamber cover.






- Connect VAG1598/22 test box to control module wiring harness connector.






- Check wiring between test box and harness connector for open circuit according to wiring diagram.
- Terminal -1- + socket 62
- Terminal -2- + socket 76
- Terminal -3- + socket 67
Wire resistance: max. 1.5 ohms

- Also, check if wires are shorted together.
Specified value: Infinity ohms

If no malfunction is found in the wiring and voltage was present between terminals -1- + -3-:
- Replace Camshaft Position (CMP) sensor -G40-. Service and Repair
- Check DTC memory. If necessary, repair any malfunctions and erase DTC memory.
Reading Diagnostic Trouble Codes
Clearing Diagnostic Trouble Codes

- Display readiness code. Monitors, Trips, Drive Cycles and Readiness Codes
If the DTC memory has been erased or the ECM was disconnected from permanent battery (B+) voltage, generate the readiness code again. Monitors, Trips, Drive Cycles and Readiness Codes

If no malfunction is found in the wiring and no voltage was present between terminals -1- + -3-, replace ECM.