A4 Quattro Cabriolet L4-2.0L Turbo (BWT) (2009)
Intake Air Temperature Sensor: Testing and Inspection
Intake Air Temperature Sensor, Checking
‹› Use only gold-plated terminals when servicing terminals in the electrical harness connector of the Intake Air Temperature (IAT) Sensor (G42).
Special tools, testers and auxiliary items required
‹› Multimeter.
‹› Wiring diagram.
‹› Cool spray (commercially available).
Test requirements
‹› The Engine Control Module (ECM) ( J623) fuses OK.
‹› Battery voltage at least 12.5 volts.
‹› All electrical consumers such as, lights and rear window defroster, switched off.
‹› Vehicles with automatic transmission, shift selector lever into position " P" or "N".
‹› A/C switched off.
‹› Ground (GND) connections between engine/transmission/chassis OK.
‹› Ignition switched off.
Test procedure
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Perform a preliminary check to verify the customers complaint. Refer to => [ General Diagnosis ] See: Powertrain Management/Computers and
Control Systems/Testing and Inspection/Initial Inspection and Diagnostic Overview/General Diagnosis.
Start diagnosis
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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:
If the specified value is not obtained:
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Continue the test according to the following table:
If the specified values are obtained:
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Remove engine cover - arrows -.