How to Troubleshoot the Heating/Air Conditioning
How to Use the Self-diagnostic Function
The HVAC control unit has a self-diagnostic function for heating, ventilation, and air conditioning system. To run the self-diagnostic function, do the following:
|1.||Turn the ignittion switch OFF.|
|2.||Press and hold the recirculation control and rear window defogger buttons, and turn the ignition switch ON (II).|
|3.||Recirculation indicator turns on for 2 seconds, then self-diagnostic function begins.|
- The blower motor will run at any speed regardless of the dial positioning.
- In the case of multiple problems, the recirculation indicator will blink the lowest number DTC only.
- If no DTCs are found, the indicator will not blink.
Example of DTC indication Pattern (DTC 3).
Clear the DTCs
|1.||Turn the ignition switch OFF.|
|2.||Set fan control dial OFF, temperature control dial on MAX COOL.|
|3.||Press and hold the ventilation and recirculation control buttons, turn the ignition switch ON (II).|
|4.||Ventilation indicator turns on for 2 seconds, then DTC clear.|
NOTE: After completing repair work, run the self-diagnostic function again to make sure that there are no other malfunctions.