Jetta L4-1.8L Turbo (AWD) (2000)
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Connect test box VAG 1598/31 to control module wiring harness. The engine control module remains disconnected.
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Check wiring for open circuit between test box and 5-pin connector using wiring diagram.
Contact 5 + socket 29
Contact 4 + socket 53
Contact 3 + socket 27
Wire resistance: Max. 1.5 ohms
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Additionally check wires for short to one another.
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Additionally check the wiring for short to battery positive or Ground.
If no wiring fault is detected:
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Replace Mass Air Flow (MAF) sensor (G70) item 2. See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Air
Cleaner Housing/Service and Repair
