Outside Air Temperature Sensor - G17-, CHECKING: Function
WARNING: This page is about a different car, the 2015 Volkswagen Passat and 2014 Volkswagen Passat. However, it is still accessible from the selected car via links, so may be relevant.
The ambient or Outside Air Temperature Sensor -G17- is a negative temperature coefficient (NTC) sensor that informs the semiautomatic / automatic temperature control system of outside air temperature. An NTC sensor's resistance decreases as the temperature increases. The computer uses this input along with different in-car temperature sensors to control temperature and blower speed. When there is a problem with this sensor, performance will suffer and the compressor's clutch may not engage.
The Outside Air Temperature Sensor -G17- is also known as the Ambient Air Temperature Sensor (AAT).
Special tools and workshop equipment required
- Multimeter
- Wiring Diagram
- Scan Tool