S8 Quattro Sedan V10-5.2L (BSM) (2009)
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Checking primary voltage
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Crank the engine.
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Using a multimeter, check the Oxygen Sensor (O2S) 3 Behind Three Way Catalytic Converter (TWC) (G287) electrical harness connector
terminals 3 to 4 for voltage.
Specified value: 0.400 to 0.500 Volts
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Switch the ignition off.
If the specified value was obtained:
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Replace the Oxygen Sensor (O2S) 3 Behind Three Way Catalytic Converter (TWC) (G287).
If the specified value was not obtained:
Checking wiring
If the manufacturers test box is being used. Perform the following step.
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Install the test box.
If the manufacturers test box is not being used. Perform the following step.
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Remove the Engine Control Module (ECM) 2 (J624).
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Using a Multimeter, check the Oxygen Sensor (O2S) 3 Behind Three Way Catalytic Converter (TWC) (G287) electrical harness connector
terminals to the Engine Control Module (ECM) 2 (J624) electrical harness connector T94d terminals for an open circuit.