Throttle Position (TP) Sensor G79/Accelerator Pedal Position Sensor 2 G185 , checking (Engine Code AMB)

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Special tools, testers and auxiliary items required

Multimeter.
Wiring diagram

Test requirement

Fig 1: Identifying Main Fuse Panel

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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 sequence

Remove the drivers side storage compartment. Refer to →
- 68 - INTERIOR EQUIPMENT
- 68 - INTERIOR EQUIPMENT for BODY INTERIOR - CABRIOLET
.

Fig 2: Kick Down Switch F8

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

Checking voltage supply and wiring

Switch the ignition on.

Fig 3: Identifying 6-Pin Electrical Harness Connector & Terminals

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

Throttle Position (TP) Sensor G79/Accelerator Pedal Position Sensor 2 G185 electrical harness connector terminals	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 was not obtained:

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

Install the test box. Refer to → 24 MULTIPORT FUEL INJECTION (MFI) .

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 (ECM) J220 , replacing .

Fig 4: Identifying 6-Pin Connector & Terminals

Courtesy of VOLKSWAGEN UNITED STATES, INC.

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

Throttle Position (TP) Sensor G79/Accelerator Pedal Position Sensor 2 G185 electrical harness connector terminals	Motronic Engine Control Module (ECM) J220 electrical connector test box sockets
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 if the voltage supply was OK:

Replace the Throttle Position (TP) Sensor G79/Accelerator Pedal Position Sensor 2 G185. → 20 - FUEL SUPPLY SYSTEM .

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 (ECM) J220 , replacing .
Install the drivers side storage compartment. Refer to →
- 68 - INTERIOR EQUIPMENT
- 68 - INTERIOR EQUIPMENT for BODY INTERIOR - CABRIOLET
.

Final procedures

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

Check the DTC memory.
If necessary, erase the DTC memory. Refer to Diagnostic Mode 04: Reset/delete diagnostic data .
If the DTC memory was erased, generate readiness code. Refer to Readiness Code .

End of diagnosis.