Throttle Position (TP) sensor, checking: Notes

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

Requirements

Fig 1: Identifying Main Fuse Panel

Courtesy of VOLKSWAGEN UNITED STATES, INC.

The respective fuses of Motronic Engine Control Module (ECM) -J220- must be OK:

Refer to Electrical Wiring Diagrams, Troubleshooting & Component Locations

Fig 2: Identifying Relays And Fuses In Protective Housing (Left Side Of Plenum Chamber)

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Fuses -1, 2, 3, 4 and 7- in protective housing (plenum chamber, left) must be OK:

Refer to Electrical Wiring Diagrams, Troubleshooting & Component Locations

Battery voltage must be at least 11.5 Volts.
All electrical consumers, e.g. lights and rear window defroster, must be switched off.
Parking brake must be engaged or else daylight driving lights will be switched on.
For vehicles with automatic transmission, selector lever must be in position -P- or -N-.

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

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.

Work sequence

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

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