S6 Quattro Sedan V10-5.2L (BXA) (2007)
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Oxygen Sensor: Testing and Inspection
Oxygen Sensor Heater after Catalytic Converter, Checking
Oxygen Sensor Heater after Catalytic Converter, Checking
Oxygen Sensor 1 Heater, Checking
The following procedure is used to diagnose Oxygen Sensor (O2S) 1 (behind Three Way Catalytic Converter (TWC)) Heater (Z29) for Oxygen
Sensor (O2S) Behind Three Way Catalytic Converter (TWC) (G130) which is controlled by the Motronic Engine Control Module (ECM) (J623).
‹› When servicing terminals in harness connector of Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) use only gold-plated
terminals.
Special tools, testers and auxiliary items required
‹› Multimeter.
‹› Wiring diagram.
Test requirements
‹› Fuse (SA7) OK.
‹› Battery voltage at least 12.5 volts.
‹› All electrical consumers such as, lights and rear window defroster, switched off.
‹› Vehicles with automatic transmission, shift selector lever into position " P" or "N".
‹› A/C switched off.
‹› Ground (GND) connections between engine/transmission/chassis OK.
‹› Ignition switched off.
Procedure
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Raise the vehicle.
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Loosen the quick release fasteners - 1 - and - 2 - and remove the noise insulation panel.
