Without Scan Tool

Indicator Check




a. Turn the ignition switch ON while pressing the A/C control AUTO switch and REC switch simultaneously.




b. Check that all the indicators light up and go off at 1 second intervals 4 times in succession.
c. Check that the buzzer sounds when the indicators light up in 2.

HINT:
- After the indicator check is ended, the diagnostic trouble code check begins automatically.
- Press the OFF switch when cancelling the check mode.

DTC CHECK (SENSOR CHECK)




a. Perform an indicator check. After the indicator check is completed, the system enters the DTC check mode automatically.
b. Read the code displayed on the panel. Refer to the list of DTCs when reading the trouble codes. Diagnostic Trouble Code Descriptions (Trouble codes are output at the temperature display.)

If the slower display is desired, press the UP switch and change it to step operation. Each time the UP switch is pressed, the display changes by 1 step.






HINT:
- If the buzzer sounds when a trouble code is being read, it means the trouble indicated by that trouble code continues to occur.
- If the buzzer does not sound when a trouble code is being read, it means the trouble indicated by that trouble code occurred earlier (such as poor connector contacts, etc.).