audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

With Generic Scan Tool|Page 2807 > < Fuel Delivery Unit and Fuel Level Sensor, Assembly Overview|Page 2802
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Intake Air Temperature Sensor: Testing and Inspection
With Generic Scan Tool

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

Recommended special tools and equipment

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V.A.G1526A hand multimeter

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V.A.G1594A connector test kit

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V.A.G1598/31 test box

Test requirements:

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Fuses for engine electronics OK

-

Ignition switched off.

Checking function

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Connect diagnostic tester.  See: Computers and Control Systems/Testing and Inspection/Scan Tool Testing and Procedures/Scan Tool
Testing/With Generic Scan Tool/Scan Tool Connecting/Connect Diagnostic Tester

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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.

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End diagnosis and switch ignition off.

If indications do not resemble description.

Checking internal resistance

With Generic Scan Tool|Page 2807 > < Fuel Delivery Unit and Fuel Level Sensor, Assembly Overview|Page 2802