Initial Inspection and Diagnostic Overview

How to Troubleshoot the Heating and A/C Systems

How to Retrieve a DTC

The heater control panel has a self-diagnostic function for heating, ventilation, and air conditioning system. To run the self-diagnostic function, do the following:

1. Turn the ignition switch to LOCK (0).

2. Press the RECIRCULATION CONTROL button and the REAR WINDOW DEFOGGER button.

3. While holding the both buttons down, turn the ignition switch to ON (II).

4. The self-diagnosis begins, and runs for about 15 seconds.

- If there is any problem in the system after self-diagnosis is finished, the RECIRCULATION INDICATOR will blink the Diagnostic Trouble Code (DTC) 7 through 15.
- If no DTCs are found, the indicator will not blink.





Example of DTC indication Pattern (DTC 7)





Resetting the Self-Diagnostic Function

Turn the ignition switch to LOCK (0) to cancel the self-diagnostic function. After completing repair work, run the self-diagnostic function again to make sure that there are no other malfunctions.

Max Cool Position Function

When the MODE CONTROL dial is in the MAX A/C position, the heater control panel will automatically select the Recirculation mode and turn the A/C on. The RECIRCULATION CONTROL button and A/C button are disabled and cannot be turned off in this mode. If the control panel fails to function as described, replace it.