R8 Quattro Coupe V10-5.2L (BUJ) (2010)
If the specification was not obtained:
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Replace Heated Oxygen Sensor (HO2S) 2 (G108). Refer to appropriate service information.
If the specification was obtained:
Checking voltage supply
Crank the engine.
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Using a multimeter, check the Heated Oxygen Sensor (HO2S) 2 (G108) electrical harness connector terminal 2 to 6 for voltage.
Specified value: 0.400 to 0.500 Volts
Switch the ignition off.
If the specification was not obtained:
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Check the wiring from the Heated Oxygen Sensor (HO2S) 2 (G108) electrical harness connector terminal 4 to the Motronic Engine Control
Module (ECM) Power Supply Relay (J271) socket 2/30 for an open circuit, a short circuit to Battery (+), or Ground (GND).
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Check the electrical harness connector for damage, corrosion, loose or broken terminals.
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If necessary, repair the faulty wiring connection.
If the specification was obtained:
Checking Ground (GND) activation
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). Refer to appropriate service information.
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Using a multimeter, check the Heated Oxygen Sensor (HO2S) 2 (G108) electrical harness connector to the Engine Control Module (ECM) 2
(J624) electrical harness connector T94a for resistance.