Inside air temperature sensor inspection

1. On-vehicle inspection

1) Operate the blower fan motor.

2) Confirm that smoke is drawn in when it is brought near the inside air temperature sensor inlet.

3) If it is not drawn in, inspect whether the aspirator hose is coming off, or the aspirator body.

Legend

2. Resistance measurement

1) Remove the inside air temperature sensor and disconnect the connector.

2) Measure the continuity and resistance between the inside air temperature sensor connector terminals No.1 and No.2 using a DMM.

3) Check that the resistance becomes small when the thermo-sensitive sensor ambient temperature becomes high, and the resistance becomes large when the temperature becomes low.

Standard: 2.1 to 2.3 kΩ at 25°C {77 °F}