Outside Air Temperature Sensor -G17-, CHECKING: Function

The ambient or Outside Air Temperature Sensor -G17- is a negative temperature coefficient (NTC) sensor that informs the semi-automatic/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.

Special tools and workshop equipment required 

• Multimeter
• Wiring Diagram
• Scan Tool