Passat Sedan L4-1781cc 1.8L Turbo (AEB) (1999)
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Disconnect 4-pin harness connector (brown) to Oxygen sensor G39 (before Three Way Catalyst) -1-.
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Check wiring for open circuit between Test Box and 4-pin harness connector to ECM using Wiring diagram.
Terminal 3 + socket 25
Terminal 4 + socket 26
Wire resistance: Max. 1.5 Ohms
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Check wiring at connector terminals 3 + 4 for short circuit to terminals 1 + 2 using Wiring diagram.
Specification: Infinity Ohms