Passat Syncro Wagon V6-2771cc 2.8L DOHC (AHA) (1998)
With Generic Scan Tool
Oxygen sensor heater for oxygen sensors before Three Way Catalytic Converter (TWC), checking
NOTE: When servicing terminals in harness connector of Heated Oxygen Sensor (HO2S), use only gold-plated terminals.
Recommended special tools and equipment
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V.A.G 1526 multimeter or V.A.G 1715 multimeter
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V.A.G 1594 Connector test set
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Wiring diagram
Test requirements
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The respective fuses of Heated Oxygen Sensor (HO2S) -G39- and Heated Oxygen Sensor (HO2S) 2 -G108- must be OK:
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Ignition switched off.
Test sequence
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Disconnect 4-pin harness connector to the respective oxygen sensor:
Heated Oxygen Sensor (HO2S) -G39-, bank 1 4-pin harness connector (black, arrow).
Heated Oxygen Sensor (HO2S) 2 -G108-, bank 2 4-pin harness connector (black, arrow).
NOTE: