volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

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Check wiring between test box and connector for open circuit according to wiring diagram.
Terminal 1 + socket 2
Terminal 1 + socket 28
Terminal 2 + socket 46

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Wire resistance: max. 1.5 ohms

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Additionally check wires for short to one another, to vehicle Ground and to battery positive (B+).

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Specification: Infinity ohms

If wiring and the resistance measurement values are OK:

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Replace engine control module. See: Computers and Control Systems/Engine Control Module/Service and Repair 

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