Beetle L4-1781cc 1.8L Turbo (APH) (1999)
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Connect test box V.A.G 1598/31 to control unit wiring harness. The engine control unit is not connected by this action.
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Check wiring between test box and connector for open circuit according to current flow diagram.
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Contact 1 + socket 24
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Contact 2 + socket 11
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Contact 3 + socket 23
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Contact 4 + socket 12
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Contact 6 + socket 25
Vehicles with automatic gearbox:
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Contact 5 + socket 8
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Wire resistance: max. 1.5 ohms
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Additionally check the wiring for short to battery positive or Ground.
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Additionally check wires for short to one another.
If no wiring malfunction is detected:
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Replace accelerator pedal position sensor, see "Fuel Supply System Components, Removing And Installing" item 4. See: Fuel Delivery and Air
Induction/Service and Repair