Jetta L4-2.0L (AEG) (2000)
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VAG1594 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 like, for example, lights and rear window heating 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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Coolant temperature must be at least 80°C, Diagnostic mode 1: Check measuring values; PID 5, Coolant temperature. See: Computers and Control
Systems/Testing and Inspection/Scan Tool Testing and Procedures/With Generic Scan Tool/Diagnostic Mode 1: Check Measured Values
Test sequence
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Disconnect the 8-pin connector at the throttle valve control module.
Check resistance
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Measure resistance of Throttle Position (TP) Actuator -V60- between the following terminals.
Vehicles with cruise control: Terminal 7 + 8
Specified value: 3...200 ohms
Vehicles without cruise control: Terminal 1 + 2
Specified value: 3...200 ohms
If specified value is not obtained:
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Replace Throttle Valve Control Module -J338-
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Erase DTC memory of Engine Control Module (ECM),Diagnostic mode 4: Reset/erase diagnostic data.
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Generate readiness code See: Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes
If specified value is obtained:
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Check voltage supply of throttle valve control module and wiring to control module.
If voltage supply and wires are OK:
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Replace Motronic Engine Control Module (ECM) -J220-