New Beetle Turbo S L4-1.8L Turbo (AWP) (2002)
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Connect VAG 1598/31 test box to control module wiring harness. Engine Control Module is not connected by this action.
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Check wiring between test box and 4-pin connector for open circuit according to Electrical Wiring Diagrams.
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Cylinder 1 terminal 3 + socket 102
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Cylinder 2 terminal 3 + socket 95
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Cylinder 3 terminal 3 + socket 103
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Cylinder 4 terminal 3 + socket 94
Wire resistance: Max. 1.5 Ohms
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Additionally check wires for short to one another.
Specification: Infinity Ohms
If no malfunction can be found in the wiring:
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Replace Engine Control Module (ECM).