Jetta Sedan L5-2.5L (BGP) (2005)
Accelerator Pedal Position Sensor: Testing and Inspection
Throttle Position (TP) Sensor G79 / Accelerator Pedal Position Sensor 2 G185, Checking
Throttle Position (TP) Sensor G79 / Accelerator Pedal Position Sensor 2 G185, Checking
Special tools, testers and auxiliary items required
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Hand multimeter V.A.G 1526 or Multimeter V.A.G 1715
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Test adapter kit V.A.G 1594
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Wiring diagram
Test conditions
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The respective fuses of Motronic Engine Control Module (ECM) J220 must be OK.
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Battery voltage must be at least 11.5 Volts.
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All electrical consumers such as, lights and rear window defroster must be switched off.
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The parking brake must be applied, otherwise the daytime running lights are switched on.
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On vehicles with automatic transmission, selector lever must be in position "P" or "N".
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If vehicle is equipped with an A/C system, it must be switched off.
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The ground (GND) connections between engine and body must be OK.
Function
Both Throttle Position (TP) Sensor G79 / Accelerator Pedal Position Sensor 2 G185 are located at the accelerator pedal and communicate the driver's
intentions to the Motronic engine control module (ECM) J220 completely independently of each other. Both sensors are integrated into one housing.
Test sequence
NOTE: When servicing terminals in the harness connector for the Throttle Position (TP) Sensor G79 / Accelerator Pedal Position Sensor 2 G185, use
only gold-plated terminals.
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Remove steering column cover.
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Disconnect 6-pin connector from Throttle Position (TP) Sensor G79 / Accelerator Pedal Position Sensor 2 G185.
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Switch ignition on.
Check voltage supply and wiring for Motronic Engine Control Module (ECM) J220.
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Connect multimeter V.A.G 1526 to the following connector terminals for voltage measurement.
Terminal 1
Ground (GND)
Terminal 1
Terminal 5
Terminal 2
Ground (GND)
Terminal 2
Terminal 3