DTC B14A9: Glass Surroundings Temperature Sensor Circuit [10/2014 - ]: Description

The air conditioning amplifier assembly detects the temperature of the area near the windshield glass using this circuit. The air conditioning amplifier assembly applies voltage to the air conditioning thermistor assembly (glass surroundings temperature sensor). As the temperature of the area near the windshield glass rises, the resistance decreases. The air conditioning amplifier assembly detects the resistance change as the windshield glass surroundings temperature changes.

The glass surroundings temperature sensor is integrated with the air conditioning thermistor assembly.