Cabin Temperature Sensor / Switch: Testing and Inspection

In-Vehicle Sensor (Auto A/C Model)

INSPECTION

Preparation tool: Circuit tester

1. Set the vehicle to the following conditions.






2. Check the suction port (A) for in-vehicle sensor provided on the instrument panel lower cover.






1. Put a strip of paper close to the front side of the suction port (A).
2. Can you see the paper moving towards the port and the air being sucked into the port?

CAUTION: Be careful not to let the paper get sucked into the port.

- Yes --> Go to step 5).
- No --> Go to step 3).

3. Remove the instrument panel lower cover, and check the aspirator hose (A).






1. Is the aspirator hose on both sides of case and sensor disconnected?
2. Are there any kinks or cracks on the aspirator hose?
- No --> Go to step 4).
- Yes --> Repair or replace the aspirator hose if necessary.

4. Check if there is anything that affects sensing, around the in-vehicle sensor.
1. Is the in-vehicle sensor hole plugged?
2. Is there any heat-producing part (audio or navigation system, etc.) around in-vehicle sensor?
- No --> Go to step 5).
- Yes --> Remove everything that affects sensing.

5. Perform the inspection of in-vehicle sensor unit.
1. Disconnect the in-vehicle sensor connector.
2. Is the resistance between terminals of in-vehicle sensor within standard value?

CAUTION: During inspection, be careful not to touch the sensor end in order to avoid misjudgment due to body temperature.






- Yes --> The in-vehicle sensor is normal.
- No --> Replace the in-vehicle sensor.