Throttle Position (TP) sensor, checking: Notes

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 

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

Refer to Electrical Wiring Diagrams, Troubleshooting & Component Locations

• Battery voltage must be at least 11.5 volts.
• All electrical consumers such as, for example, 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 -P-.

• Ground (GND) connections between engine and chassis must be OK.
• Ignition switched off.

Test sequence 

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