Air Temperature Sensor ( Ambient / Intake ): Description and Operation

Fig. 42b Air Temperature Sensor.:

The air temperature sensor, incorporated into the air flow meter, monitors change in the intake air temperature and transmits a signal to control fuel injection in response to the varying pulse duration. The temperature sensing unit employs a thermistor which is sensitive in the low temperature range.

Fig. 42c Water Temperature and Air Temperature Sensor Graph.:

The electrical resistance of the thermistor decreases in response to the rise in air temperature.