Throttle Position Sensor/Accelerator Pedal Position Sensor 2, Checking

WARNING: This page is about a different car, the 2007 Audi A3 and 2006 Audi A3. However, it is still accessible from the selected car via links, so may be relevant.

Special tools and workshop equipment required

Multimeter.
Wiring diagram

Test requirement

The Motronic Engine Control Module (ECM) - J220- fuses OK.
Battery voltage at least 12.5 volts.
All electrical consumers such as, lights and rear window defroster, switched off.
Vehicles with automatic transmission, shift selector lever into position "P" or "N".
A/C switched off.
Ground (GND) connections between engine/transmission/chassis OK.

NOTE:

Use only gold-plated terminals when servicing the electrical harness connector terminals in Throttle Position (TP) Sensor -G79- /Accelerator Pedal Position Sensor 2 -G185-.

Test procedure

-- Perform a preliminary check to verify the customers complaint. Refer to GENERAL DIAGNOSIS .

Start diagnosis

-- Remove the drivers side storage compartment. Refer to Repair information.

-- Disconnect the Throttle Position (TP) Sensor -G79- /Accelerator Pedal Position Sensor 2 -G185- 6-pin electrical harness connector.

Checking voltage supply and wiring

-- Switch the ignition on.

-- Using a Multimeter --, check the following wiring connections for voltage.

Fig 1: Identifying 6-Pin Electrical Harness Connector & Terminals

Courtesy of AUDI OF AMERICA, LLC

Throttle Position (TP) Sensor -G79- /Accelerator Pedal Position Sensor 2 -G185- electrical harness connector terminal	Specified value
1 to Ground (GND)	about 5 V
1 to 5	about 5 V
2 to Ground (GND)	about 5 V
2 to 3	about 5 V

-- Switch the ignition off.

If the specification is not obtained:

If the manufacturers test box is being used. Perform the following step.

-- Install the test box. Refer to Repair information.

If the manufacturers test box is not being used. Perform the following step.

-- Remove the Motronic Engine Control Module (ECM) -J220-. Refer to MOTRONIC ENGINE CONTROL MODULE, REPLACING .

-- Using a Multimeter --, check the Throttle Position (TP) Sensor -G79- /Accelerator Pedal Position Sensor 2 -G185- 6-pin electrical harness connector terminals to the Motronic Engine Control Module (ECM) -J220- electrical connector T121 for an open circuit according to wiring diagram.

Fig 2: Identifying 6-Pin Electrical Connector & Terminals

Courtesy of AUDI OF AMERICA, LLC

Throttle Position (TP) Sensor -G79- /Accelerator Pedal Position Sensor 2 -G185- electrical harness connector terminals	Motronic Engine Control Module (ECM) -J220- electrical connector T121 terminals or test box socket
1	72
2	73
3	36
4	35
5	33
6	34

Specified value: 1.5 Ω max.

If the specification is not obtained:

-- Check the wiring for a short circuit to each other, Battery (+), and Ground (GND).

-- Check the electrical harness connector for damage, corrosion, lose or broken terminals.

-- If necessary, repair the faulty wiring connection.

If no malfunction is detected in the wiring and the voltage supply was OK:

-- Replace the Throttle Position (TP) Sensor -G79- /Accelerator Pedal Position Sensor 2 -G185-. Refer to Repair information.

If no malfunction is detected in the wiring and if the voltage supply was not OK:

-- Replace the Motronic Engine Control Module (ECM) -J220-. Refer to MOTRONIC ENGINE CONTROL MODULE, REPLACING .

-- Install the drivers side storage compartment. Refer to Repair information.

Final procedures

After repair work, the following work steps must be performed in the following sequence:

Check the DTC memory. Refer to DIAGNOSTIC MODE 03 - READ DTC MEMORY .
If necessary, erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .
If the DTC memory was erased, generate readiness code. Refer to READINESS CODE .

-- End of diagnosis.