audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

How to Find Wiring Diagrams|Page 4365 > < How to Find Wiring Diagrams|Page 4363
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Voltage supply for Mass Air Flow (MAF) sensor, checking

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Disconnect connector from 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)

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Operate starter briefly.
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Specification: approx. battery voltage

NOTE:  Voltage is supplied to Mass Air Flow (MAF) sensor from Fuel Pump (FP) relay.

If specified value is not obtained:

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Check wire connection from terminal 2 of connector to Fuel Pump (FP) relay via fuse for open circuit and short circuit to Ground (GND):

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Repair open circuit or short circuit if necessary.

How to Find Wiring Diagrams|Page 4365 > < How to Find Wiring Diagrams|Page 4363