TT Roadster L4-1.8L Turbo (AWP) (2003)
Accelerator Pedal Position Sensor: Testing and Inspection
Throttle Position (TP) Sensor, Checking
Throttle Position (TP) Sensor, Checking
Recommended special tools and equipment
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VAG1526 multimeter or VAG1715 multimeter
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VAG1594 connector test kit
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Wiring diagram
Test requirement
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The respective fuses of Motronic Engine Control Module (ECM) -J220- 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
NOTE: When servicing terminals in the harness connector for the Throttle Position (TP) Sensor, 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 and wiring to control module
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Connect multimeter to the following connector terminals for voltage measurement.
Terminal 1 + Ground (GND)
Terminal 1 + 5
Terminal 2 + Ground (GND)
Terminal 2 + 3
Specified value: at least 4.5 V
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Switch ignition off.
If specified values are not obtained:
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Connect test box to control module wiring harness, do not connect Engine Control Module (ECM), connecting test box for wiring test. See:
Computers and Control Systems/Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/Scan Tool Connecting/With Generic
Scan Tool/Test Box, Connecting For Wiring Test