Ambient Temperature Display Error (Excessively High Or Low, No Change, Or No Display)

Probable cause: 

Ambient temperature sensor unit malfunction or temporary inaccurate display due to the control.

1. CHECK AMBIENT ENVIRONMENT  .
   1. Turn the ignition switch to ON.
   2. Check the ambient temperature displayed on the combination meter and the center information display.
   3. Check ambient temperature of the vehicle.
   4. Check the difference between the displayed temperature and ambient temperature.

   Is the displayed temperature excessively higher than the ambient temperature?

   Yes:  Go to  2.

   No:  Go to  3.

2. COOL AMBIENT TEMPERATURE SENSOR  .
   1. Cool the sensor body by spraying water on the ambient temperature sensor, etc.
   2. Check the ambient temperature displayed on the combination meter.
   3. Check ambient temperature of the vehicle.
   4. Check the difference between the displayed temperature and ambient temperature.

   Is the displayed temperature excessively higher than the ambient temperature?

   Yes:  Go to  3.

   No:  The circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis.

3. MEMORY CLEAR OF AMBIENT TEMPERATURE SENSOR CONTROL  .
   1. Turn the ignition switch to OFF.
   2. Leave it for 60 minutes or more.
   3. Disconnect the connector from ambient sensor.
   4. Wait for at least 5 seconds.
   5. Connect the connector to the ambient sensor.
   6. Turn the ignition switch to ON.
   7. Check the ambient temperature displayed on the combination meter.

   Is the displayed temperature excessively lower than the ambient temperature?

   Yes:  Go to  4.

   No:  The circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis.

4. VISUALLY CHECK AMBIENT TEMPERATURE SENSOR  .
   1. Turn the ignition switch to OFF.
   2. Visually check the ambient temperature sensor for dirt or damage.

   Is the ambient temperature sensor clean without dirt or damage?

   (Do not touch the sensor tip.)

   Yes:  Go to  5.

   No:  Clean the sensor if there is any dirt, Go to  3.

   Change the ambient temperature sensor if it is damaged. Ref. to AIR CONDITIONER>AMBIENT SENSOR .

5. CHECK AMBIENT SENSOR UNIT  .

   Perform the inspection of ambient sensor unit. Ref. to AIR CONDITIONER>AMBIENT SENSOR>INSPECTION .

   Is the check result OK?

   Yes:  Repair or replace the open circuit of harness.

   No:  Replace the ambient sensor. Ref. to AIR CONDITIONER>AMBIENT SENSOR .