A4 Quattro Cabriolet L4-2.0L Turbo (BWT) (2009)
If indication jumps to approx. -40° C or -46° C:
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End diagnosis and switch ignition off.
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Replace the Intake Air Temperature (IAT) Sensor ( G42 ).
If the indication remains at approx. 140° C:
Checking wiring
If the manufacturers test box is being used. Perform the following step.
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Install the test box. Refer to Fuel Injection and Ignition Repair Information
If the manufacturers test box is not being used. Perform the following step.
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Remove the Engine Control Module (ECM) (J623). Refer to => [ Engine Control Module, Replacing ] See: Computers and Control
Systems/Engine Control Module/Service and Repair.
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Using a Multimeter, check the Intake Air Temperature (IAT) Sensor (G42 ) electrical harness connector terminals to the Engine Control Module
(ECM) ( J623) electrical harness connector T60 terminals for resistance.
Specified value: 1.5 ohms Max.