Passat Sedan V6-2771cc 2.8L DOHC (AHA) (1998)
Heated Oxygen Sensor -G39- Bank 1, black connector (arrow)
Heated Oxygen Sensor -G108- Bank 2, black connector (arrow)
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Connect multimeter US1119 (Fluke 83 or equivalent) between harness connector terminals 3 and 4 (to ECM), using adapter cables from VW1594
connector test kit.
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Start engine and measure voltage.
Specified value: 0.40-0.50 volts
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Switch ignition off.
If voltage is NOT OK:
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Check HO2S wiring.