Touareg V8-4.2L (BHX) (2004)
Accelerator Pedal Position Sensor: Testing and Inspection
Diagnostic Procedures
Throttle Position Sensor, Checking
Special tools, testers and auxiliary items required
‹› Multimeter (VAG1526) or multimeter (VAG1715)
‹› Connector test kit (VAG1594)
‹› Wiring diagram
Test requirements
‹› Fuses in E-box (in plenum chamber, left) must be OK:
‹› Battery voltage must be at least 11.5 volts.
‹› All electrical consumers such as, for example, lights and rear window defroster must be switched off.
‹› Parking brake must be engaged or else daylight driving lights will be switched on.
‹› For vehicles with automatic transmission, selector lever must be in P position.
‹› If vehicle is equipped with an A/C system, it must be switched off.
‹› Ground (GND) connections between engine and chassis must be OK.
Function
Both the Throttle Position (TP) Sensor (G79) and the Sender -2- for accelerator pedal position (G185) are located at the accelerator pedal and
communicate the driver's intentions to the ECM completely independently of each other. Both sensors are stored in one housing.
Test sequence
‹› When servicing terminals in the harness connector for the Throttle Position (TP) Sensors, use only gold-plated terminals.
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Remove footwell cover (driver's side).
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Disconnect 6-pin connector from Throttle Position (TP) Sensor.
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Switch ignition on.
Checking voltage supply