A6 V6-3.0L (AVK) (2004)
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Start engine and let run at idle.
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In diagnostic function "33 - OBD", select "Mode 1: Checking measured values."
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Select the desired measuring value "PID 16: Air flow quantity at Mass Air Flow (MAF) sensor".
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Specified value: 1.0 ... 5.0 g/s
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End diagnosis and switch ignition off.
If the specified value is not reached:
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Check intake air system for leaks (false air). See: Fuel Delivery and Air Induction/Testing and Inspection/Checking Intake Air System For Leaks
(Unmetered or False Air)
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Check voltage supply and wire connections
If the specified value is exceeded:
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Eliminate engine load via additional equipment (A/C system/power-assisted steering/alternator).
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Check voltage supply and wire connections
Checking voltage supply
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Remove cover -1- in engine compartment (right side).
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Disconnect harness connector -arrow- at Mass Air Flow (MAF) sensor.
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Connect multimeter for voltage measurement as follows.
Harness connector
Measure to
Terminal
2
Engine Ground (GND)