A4 Quattro Wagon V6-3.2L (BKH) (2005)
Intake Air Temperature Sensor: Testing and Inspection
Intake Air Temperature (IAT) Sensor G42, Checking
The Intake Air Temperature (IAT) Sensor G42 and the Manifold Absolute Pressure (MAP) Sensor G71 are integrated into one unit and cannot be
serviced separately.
Special tools, testers and auxiliary items required
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Multimeter.
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Wiring diagram.
Test requirements
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Fuses for engine electronics OK.
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Battery voltage at least 12.5 V.
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The ignition switched off.
Checking function
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Connect the scan tool.
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Switch the ignition on.
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Using the scan tool, check the intake air temperature:
Diagnostic text
Specified value
Intake Air Temperature (IAT)
approx. ambient air temperature
If the specified value is not obtained:
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End diagnosis and switch the ignition off.
Procedure
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Remove the rear engine cover - arrows -.
Checking voltage supply
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Disconnect the Intake Air Temperature (IAT) Sensor G42 electrical harness connector - 4 -.
Switch the ignition on