Golf L4-1.9L DSL Turbo (ALH) (1999)
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Check wiring between test box and connector for open circuit according to current flow diagram.
Wire resistance: max. 1.5 ohms
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Check wires for short to one another, to vehicle Ground and to battery positive (B+).
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Specification: Infinity ohms
If no wiring malfunction is detected:
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Replace engine control module.