Golf GL L4-2.0L (AEG) (2001)
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Check wiring between test box and connector for open circuit according to wiring diagram:
contact 1 + sleeve 72
contact 2 + sleeve 73
contact 3 + sleeve 36
contact 4 + sleeve 35
contact 5 + sleeve 33
contact 6 + sleeve 34
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Resistance: max. 1.5 Ohms
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Check wiring for short circuit to battery positive or Ground.
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Check wiring for short circuit to one another.
If no wiring malfunction is found:
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Replace throttle position sensor, item 4
NOTE: For vehicles with automatic transmission, the transmission control module must also be adapted:
With Generic Scan Tool
Throttle Valve Control Module, Checking
NOTE: Use only gold-plated terminals when servicing terminals in harness connector of throttle valve control module.
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 throlle 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" 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 unit is different in vehicles with and without cruise control. Characteristic: Steering column switch
with operating unit for cruise control.
Recommended special tools and equipment
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VAG1526 multimeter or VAG1715 multimeter