Q7 Quattro V8-4.2L (BAR) (2008)
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Using a multimeter, check the Mass Air Flow (MAF) Sensor 2 (G246) electrical harness connector terminal 2 to engine Ground (GND).
Specified value: battery voltage.
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Switch the ignition off.
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 Motronic Engine Control Module (ECM) (J623). Refer to => [ Engine Control Module, Replacing ] See: Computers and Control
Systems/Engine Control Module/Service and Repair/Engine Control Module, Replacing.
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Using a multimeter, check the Mass Air Flow (MAF) Sensor 2 (G246) electrical harness connector terminals to the Motronic Engine Control
Module (ECM) (J623) electrical harness connector T94 terminals for an open circuit.