DTC 00777 Short to Positive

DTC Code 00777, Throttle Position Sensor G79:
Short To Positive

The Throttle Position sensor is located in the drivers footwell on the Accelerator Pedal. The TP sensor communicates the pedal position to the ECM.

Special Tools, Testers And Auxiliary Items:
- VAG 1598/18 Test Box adaptor
- Fluke 83 Multimeter or equivalent
- VW 1594 Adaptor kit
- Wiring diagram

Work Sequence:
Display will appear as shown:

Rapid data transfer HELP
Select function XX

- Press 0 and 6 buttons to select Function 06 "End data transfer"
- Press Q button to enter input
- Switch OFF ignition





- Disconnect Throttle Position sensor harness connector -1-
- Measure sensor resistance between connector terminals 1 + 3
Pedal in Closed Throttle Position
Specification: 1000 to 1500 ohms
Pedal in Wide Open Throttle position
Specification: 1500 to 2500 ohms

If specified resistance not obtained:
- Replace Throttle Position sensor G79





If specified resistance obtained:
- Connect VAG 1598/18 Test Box adaptor to ECM wiring harness connector -1-





- Check wiring for open circuit between VAG 1598/18 Test Box adaptor and harness connector using wiring diagram:
Terminal 1 + socket 15
Terminal 2 + socket 57
Terminal 3 + socket 55
Wire resistance: 1.5 ohm maximum

- Check for shorting between wires
Specification: infinite ohms

If no malfunction detected:
- Replace ECM J248