TP Sensor 1 -G79- and Throttle Position Sensor 2 -G185-

Throttle Position (TP) Sensor 1 -G79- And Throttle Position Sensor 2 -G185-, Checking







Special tools and workshop equipment required:

- V.A.G 1526 A Multimeter.
- V.A.G 1594 A Connector test kit.
- V.A.G 1598/31 Test box.
- VAS 5051.
- VAS 5051/1 Adapter.

Both the Throttle Position (TP) sensor 1 -G79-and the Throttle Position sensor 2 -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.

Test sequence

- Connect vehicle diagnostic, testing and information system VAS 5051 and select vehicle system "01 - Engine electronics" in selection. Connecting VAS 5051 Scan Tool

When doing this the ignition must be switched on.

Display on VAS 5051:







- Under -1- select diagnostic function "08 - Read measured value block".

Display on VAS 5051:







1 - Enter display group.
- Enter "062" for "display group number 062" in field -2- and confirm entry by pressing -Q- button.

Display on VAS 5051:







- Check indication in display groups -3- and -4-.

Display Group 062:

- Observe readouts in display fields 3 and 4.
- Slowly depress accelerator pedal.

Percentage displayed in field 3 should rise evenly. Tolerance range from 12..0.97 % is not fully utilised.

Percentage displayed in field 4 should also rise evenly. Tolerance range from 4...49 % is not fully utilised.

NOTE: The value displayed in field 3 must always be about twice as large as that in field 4.

- Exit function "08 - Read measured value block" by pressing <- button.

If the displays are not as described:
- Check Throttle Position (TP) Sensor 2 -G185- voltage supply and wiring. Voltage Supply For Throttle Position Sensors -G79- and -G185-