Sentra XE L4-1.8L (QG18DE) (2000)
Intake Air Temperature Sensor: Description and Operation
Reference Data
The intake air temperature sensor is mounted to the air duct housing. The sensor detects intake air temperature and transmits a signal to the PCM.
The temperature sensing unit uses a thermistor which is sensitive to the change in temperature. Electrical resistance of the thermistor decreases in
response to the temperature rise.
CAUTION: Do not use PCM ground terminals when measuring input/output voltage. Doing so may lead to PCM's transistor damage. Use ground other
than PCM, such as engine ground.