Outside Air Temperature Sensor (G17)

Outside Air Temperature Sensor (G17)

• The vehicle electrical system control module (J519) evaluates the measured values from the outside air temperature sensor and then transmits them to the Climatronic control module (J255) (and to the control module in the instrument cluster (J285) ) via the Data bus. Refer to the Vehicle diagnostic tester in "Guided Fault Finding".

• The illustration shows the allocation of the outside air temperature sensor - A - on the Audi A5 Coupe, the Audi A5 Sportback, the Audi A4, Audi Q5 etc. The allocation can vary.






• If the vehicle has an outside air temperature sensor - A - and mount - B - installed on the air intake grille above the bumper, it is possible that a higher temperature may register due to the installation location of the sensor because the heater core and condenser are radiating heat , for example on MY 08 vehicles. Beginning with MY 09, the location of the outside air temperature sensor - A - has been moved. The outside air temperature sensor and the new bracket - C - have been move slightly forward, closer to the radiator grille and under the impact member - D -. Refer to the Parts Catalog.

• The measured value can be too high on vehicles that have the outside air temperature sensor - A - and mount - B - installed on the air intake grille above the impact member. Install the outside air temperature sensor - A - and the revised bracket - C - slightly forward and under the bumper - D -. The wire connections may have to be lengthened. Refer to the Parts Catalog. The bracket - C - is clipped into the impact member - D -. It may be necessary to drill a 7 mm hole into the impact member - D -.

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Removing and Installing

- Turn off the ignition.

- Remove the upper cover on the lock carrier cover.

- Disconnect the connector - E - on the temperature sensor - A - and remove the temperature sensor from the bracket (- B - or - D -).

• It may be necessary to first remove the bumper in order to remove the outside air temperature sensor - A - from the bracket - C - under the impact member - D - if the sensor is not accessible from above.

- After installing, check the Climatronic control module DTC memory (and the instrument cluster control module (J285) DTC memory) and erase any faults. Refer to the Vehicle diagnostic tester in "Guided Fault Finding".