S8 Quattro Sedan V10-5.2L (BSM) (2009)
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Checking voltage supply
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Using a multimeter, check the Mass Air Flow (MAF) Sensor 2 (G246)/Intake Air Temperature (IAT) Sensor 2 (G299) electrical harness connector
terminal 2 to engine Ground (GND) for voltage.
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Crank the engine.
Specified value: battery voltage.
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Switch the ignition off.
If specified value was not obtained:
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Check the Mass Air Flow (MAF) Sensor 2 (G246)/Intake Air Temperature (IAT) Sensor 2 (G299) electrical harness connector terminal 2 to
theEngine Component Power Supply Relay (J757) socket 2/87 for an open circuit.
Specified value: 1.5 ohms max.
If no malfunction is detected in the wiring and if the voltage supply was OK:
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).