audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

Air Flow Meter/Sensor|Testing and Inspection|Page 3936 > < Air Flow Meter/Sensor|Testing and Inspection|Page 3934
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Disconnect connector (arrow) to mass air flow (MAF) sensor.

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Connect multimeter as follows to measure voltage.

Connector

Measure to

terminal
2

Engine ground

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Operate starter briefly.

Specified value: approx. battery voltage

If specified value is not obtained:

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Check wiring from terminal 2 on connector via fuse to fuel pump relay for open circuit or short to Ground:

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Repair any open/short circuit as necessary.

If specified value is obtained:

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Connect multimeter between terminals 2 and 3 to measure voltage.

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Operate starter briefly (engine may start).

Specified value: approx. battery voltage

NOTE:  Engine control module Ground is present at terminal 3 of the connector.

If specified value is not obtained:

Air Flow Meter/Sensor|Testing and Inspection|Page 3936 > < Air Flow Meter/Sensor|Testing and Inspection|Page 3934