R8 Quattro Coupe V10-5.2L (BUJ) (2010)
Oxygen Sensor: Testing and Inspection
Oxygen Sensor Behind Catalytic Converter TWC, Checking
Oxygen Sensor Behind Catalytic Converter TWC, Checking
The following procedure is used to diagnose Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) (G130) which is controlled by the
Motronic Engine Control Module (ECM) (J623).
‹› When servicing the electrical harness connector terminals of the Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) (G130) ,
use only gold-plated terminals.
Special tools, testers and auxiliary items required
‹› Multimeter.
‹› Wiring diagram.
Test requirements
‹› The Motronic Engine Control Module (ECM) (J623) fuses OK.
‹› Oxygen Sensor (O2S) 1 (behind Three Way Catalytic Converter (TWC)) Heater (Z29) OK.
‹› Battery voltage at least 12.5 volts.
‹› All electrical consumers such as, lights and rear window defroster, switched off.
‹› Vehicles with automatic transmission, selector lever in position " P" or "N".
‹› A/C switched off.
‹› Ground (GND) connections between engine/transmission/chassis OK.
‹› Exhaust system between catalytic converter and cylinder head properly sealed.
‹› Coolant Temperature at least 80° C.
Function test
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Perform the function test located in diagnostic mode 06. Refer to => [ OBDMID 01 ($01): Oxygen Sensor
Monitor Bank 1 - Sensor 1 ] See: Computers and Control Systems/Testing and Inspection/Scan Tool Testing and Procedures/Diagnostic Modes 01 - 0A.
If specified values are obtained:
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End diagnosis and switch the ignition off.
If the specified values are not obtained:
Test Procedure
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Perform a preliminary check to verify the customers complaint. Refer to => [ Preliminary Check ] See: Computers and Control Systems/Testing
and Inspection/Scan Tool Testing and Procedures/Preliminary Check
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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.