New Beetle L4-1.8L Turbo (AWV) (2005)
Electronic Throttle Actuator: Testing and Inspection
Throttle Valve Control Module, Checking
NOTE: Use only gold-plated terminals when servicing terminals in harness connector of throttle valve control module.
Function
The throttle valve activation occurs via an electric motor (throttle drive) in the throttle valve control module. It is activated by the Engine Control
Module (ECM) according to specifications of the two sensors, Throttle Position (TP) Sensor -G79- and accelerator pedal position sensor 2 -G185-.
function of the EPC system.
Components of throttle valve control module -J338-:
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Throttle Drive (for Electronic Power Control (EPC)) -G186-
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Throttle Drive Angle Sensor 1 (for Electronic Power Control (EPC)) -G187-
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Throttle Drive Angle Sensor 2 (for Electronic Power Control (EPC)) -G188-
Recommended special tools and equipment
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V.A.G 1526 multimeter or V.A.G 1715 multimeter
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V.A.G 1594 connector test kit
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Wiring diagram
Test requirements
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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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Parking brake must be engaged or else day time driving lights will be switched on.
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If vehicle is equipped with an A/C system, it must be switched off.
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Ground (GND) connections between engine and chassis must be OK.
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Throttle valve must not be damaged or dirty.
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Coolant temperature must be at least 80 degrees C. Diagnostic mode 1: Check measured values; PID 5, Coolant temperature. See: Testing and
Inspection/Scan Tool Testing and Procedures/With Generic Scan Tool/Diagnostic Mode 1: Check Measured Values
Function test
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Connect diagnostic tester. See: Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/Scan Tool Connecting/Diagnostic Tester,
Connecting
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Switch ignition on.
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Under address word 33, select "Diagnostic mode 1: Check measured values."
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Select the measuring value "PID 17: Throttle valve position (absolute)."
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Check specified value of throttle valve position (absolute) at idle stop: