Passat Wagon L4-1781cc 1.8L Turbo (AEB) (1998)
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Disconnect 4-pin harness connector (black) to Oxygen sensor G108 (after Three Way Catalyst) -1-.
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Check wiring for open circuit between Test Box and 4-pin harness connector (to Control Module) using Wiring diagram.
Terminal 3 + socket 51
Terminal 4 + socket 52
Wire resistance: Max. 1.5 Ohms
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Check for short circuit between connector terminals 3 + 4 and 1 + 2 using Wiring diagram.