Throttle Position (TP) Sensor, Checking

Throttle Position (TP) Sensor, Checking

NOTE: Use only gold-plated terminals when servicing terminals in harness connector.

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

Requirement







- The respective fuses of Diesel-Direct fuel injection system must be OK.
- Battery voltage must be at least 11.5 volts.
- All electrical consumers such as, lights and rear window defroster must be switched off.
- For vehicles with automatic transmission, selector lever must be in -P-.
- Parking brake must be engaged.
- If vehicle is equipped with an A/C system, it must be switched off.
- Ground (GND) connections between engine and chassis must be OK.
- Ignition is switched off.

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

Checking voltage supply







- 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 to Engine Control Module (ECM) according to wiring diagram.

Check wires to control module
- Connect test box (1598/42) to Diesel Direct Fuel Injection (DFI) Engine Control Module (ECM) -J248- wiring harness using adapter cable (V.A.G 1598/39-2), connecting test box for wiring test. Test Box, Connecting For Wiring Test







- Check wires between test box and connector for open circuit according to wiring diagram.

Terminal 1 + socket 59
Terminal 2 + socket 84
Terminal 3 + socket 39
Terminal 4 + socket 83
Terminal 5 + socket 61
Terminal 6 + socket 17

Wire resistance: max. 1.5 Ohms

- Check wires for short circuit to each other, to vehicle Ground (GND) and to B+.
Specified value: Infinite Ohms

If no malfunction is detected in the wiring and if the voltage supply was OK:
- Replace Throttle Position (TP) Sensor -G79-.
- Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data. Diagnostic Mode 4: Reset/Erase Diagnostic Data
- generate readiness code. Monitors, Trips, Drive Cycles and Readiness Codes