Jetta V6-2.8L (AFP) (1999)
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Connect VAG1598/31 test box to control module wiring harness. Engine Control Module (ECM) is not connected by this action.
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Check wiring for open circuit between test box and 5-pin harness connector using to wiring diagram.
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Terminal -2- + socket 102
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Terminal -3- + socket 94
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Terminal -4- + socket 103
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Wire resistance: max. 1.5 ohms
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Also, check wires for short to one another.
Specified value: infinity ohms
If no wiring malfunction is detected and voltage was present between terminals -1- + -5-:
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Replace Engine Control Module (ECM).
Checking secondary winding