volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

Throttle Drive Angle Sensor 1 (For Electronic Power Control (EPC)) G187|Page 2860 > < Throttle Drive Angle Sensor 1 (For Electronic Power Control (EPC)) G187|Page 2858
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Throttle Position Sensor: Testing and Inspection

Throttle Position Sensor G79 And Accelerator Pedal Position Sensor 2 G185, Checking

Special tools, testers and auxiliary items required

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Multimeter.

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Wiring diagram

Test requirement

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The Engine Control Module (ECM) J623 fuses OK.

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Battery voltage at least 12.5 volts.

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All electrical consumers such as, lights and rear window defroster, switched off.

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Vehicles with automatic transmission, shift selector lever into position "P" or "N".

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A/C switched off.

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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 G791 
Accelerator Pedal Position Sensor 2 G185.

Test procedure

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Perform a preliminary check to verify the customers complaint.  See: Computers and Control Systems/Testing and Inspection/Scan Tool Testing
and Procedures/Preliminary Check

Start diagnosis

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Using a screwdriver, remove the steering column cover - arrows -.

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

Checking voltage supply

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Switch the ignition on.

Throttle Drive Angle Sensor 1 (For Electronic Power Control (EPC)) G187|Page 2860 > < Throttle Drive Angle Sensor 1 (For Electronic Power Control (EPC)) G187|Page 2858