Power Supply and Cables Check

Checking the power supply and cables to the control module
- Remove driver side shelf:
- Disconnect 6 pin connector for throttle position sensor.
- Turn on ignition.







- To measure voltage, connect multimeter to following contacts of connector:
- Contact 1 + ground
- Contact 1 + 5
- Contact 2 + ground
- Contact 2 + 3
- Specification: at least 4.5 V

- Turn off ignition.

If the specifications are not achieved:







- Connect VAG 1598/31 test box to control module wiring. Do not connect engine control module.







- Use wiring diagram to check cables between test box and connector for any broken connections.
- Contact 1 + cavity 72
- Contact 2 + cavity 73
- Contact 3 + cavity 36
- Contact 4 + jack 35
- Contact 5 + jack 33
- Contact 6 + jack 34
- Line resistance: max. 1.5 Ohms

- Also check cables for a short circuit to battery positive terminal or to ground.
- Also check cables for short circuits between each other.

If no problems can be found in the cables:
- Replace throttle position sensor (G79), item -4-.