Passat Sedan 4Motion V6-3.6L (BLV) (2007)
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Start engine and let it run at idle.
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Using the scan tool, Check the air flow quantity of the Mass Air Flow (MAF) Sensor (G70) at idle:
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Switch ignition off.
If the specified value was obtained, but the DTC memory has a DTC concerning the Mass Air Flow (MAF) Sensor (G70):
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Check the voltage supply of the Mass Air Flow (MAF) Sensor (G70).
If specified value was not obtained:
Checking Voltage:
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Disconnect the Mass Air Flow (MAF) Sensor (G70) electrical harness connector.
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Start the engine and let it run at idle.
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Using a multimeter, check the Mass Air Flow (MAF) Sensor (G70) electrical harness connector terminal 5 to engine ground.
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 (G70) electrical harness connector terminal 5 to fuse 10 in Fuse Panel C for high resistance, an open or
short to ground.
If no malfunction is detected in the wiring and if the voltage supply was OK:
Checking electrical circuit:
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 the Repair Information.