audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

Intake Air Temperature Sensor|Testing and Inspection|Page 4891 > < Fuel Delivery Unit and Fuel Level Sensor, Assembly Overview - Up to 10.04|Page 4887
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Intake Air Temperature Sensor: Testing and Inspection

Intake Air Temperature (IAT) Sensor -G42-, Checking

Recommended special tools and equipment

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V.A.G 1526A multimeter

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V.A.G 1594A connector test kit

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V.A.G 1598/31 test box

NOTE:  Intake Air Temperature (IAT) Sensor -G42- is integrated in Mass Air Flow (MAF) Sensor -G70-.

Test requirements:

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Fuses for engine electronics OK

-

Ignition switched off.

Checking function

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Connect diagnostic tester.  See: Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/Scan Tool Connecting/Diagnostic Tester,
Connecting

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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 15: Intake air temperature".
-

Specified value: approx. ambient temperature

NOTE:  If a temperature is indicated which differs greatly from ambient temperature of sensor, check sensor and sensor wires for contact
resistances and open circuit.

-

End diagnosis and switch ignition off.

If indications do not resemble description:

Checking wire connections

Intake Air Temperature Sensor|Testing and Inspection|Page 4891 > < Fuel Delivery Unit and Fuel Level Sensor, Assembly Overview - Up to 10.04|Page 4887