Jetta Wagon L4-2.0L (BEV) (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.
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
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 daylight 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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Throttle valve must be in Closed Throttle Position (CTP).
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Accelerator pedal adjustment must be OK (vehicles with engine code AEG).
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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
Vehicles with engine code AEG (80-pin Engine Control Module -ECM-)
Function
Components of Throttle valve control module -J338-:
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Closed Throttle Position (CTP) switch -F60-
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Throttle Position (TP) sensor -G69-
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Throttle Position (TP) sensor -G88-
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Throttle Position (TP) actuator -V60-
If the complete throttle valve control module is current-less (e.g. connector disconnected) the throttle valve moves into a particular, specified mechanical
position, which signals an increased idle speed with an engine at operating temperature.
If only the Throttle Position (TP) actuator -V60- is current-less, the throttle valve also moves into the specified mechanical position (emergency running
gap), however, since Closed Throttle Position (CTP) switch -F60- can still be recognized, an "almost normal idle RPM" is reached via the respective
ignition angle retardation.
If the Engine Control Module (ECM) detects a malfunction at Throttle Position (TP) sensor -G69-, Throttle Position (TP) actuator -V60- is switched
current-less by the Engine Control Module (ECM) and the throttle valve moves into the specified mechanical position (emergency running gap) again.
NOTE: Terminal assignment at throttle control module is different in vehicles with and without cruise control. Characteristic: Steering column switch
with operating module for cruise control.
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.