Throttle Position (TP) sensor, checking: Notes

NOTE: When servicing terminals in the harness connector for the Throttle Position (TP) Sensor, use only gold-plated terminals.

Function

Both the Throttle Position (TP) Sensor -G79- and the Sender 2 for accelerator pedal position - G185- are located at the accelerator pedal and communicate the driver's intentions to the ECM completely independently of each other. Both sensors are stored in one housing.

Recommended special tools and equipment

V.A.G 1526 multimeter or V.A.G 1715 multimeter
V.A.G 1594 connector test kit
Wiring diagram

Test requirements

Fig 1: Fuses In E-Box (Plenum Chamber, Right)

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Fuses in E-box (plenum chamber, right) must be OK:

Refer to Electrical Wiring Diagrams and Component Locations

Battery voltage (both batteries) must be at least 11.5 Volts.
All electrical consumers, such as, lights and rear window defroster must be switched off.
Parking brake must be engaged.
For vehicles with automatic transmission, selector lever must be in -P-.

If vehicle is equipped with an A/C system, it must be switched off.
Ground (GND) connections between engine and chassis must be OK.

Test sequence

Remove footwell cover (driver's side).
Disconnect 6-pin connector from Throttle Position (TP) Sensor.
Switch ignition on.

Checking voltage supply

Fig 2: Identifying 6-Pin Electrical Harness Connector & Terminals

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Connect multimeter to the following connector terminals for voltage measurement.

Terminal 1 + Ground (GND)

Terminal 1 + 5

Terminal 2 + Ground (GND)

Terminal 2 + 3

Specified value: at least 4.5 V

Switch ignition off.

If specified values are not obtained:

Check wires according to wiring diagram. Refer to Checking wiring .