How To Troubleshoot The Heating System (Without A/C)

How to Troubleshoot the Heating System

How to Use the Self-diagnostic Function

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

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

2. Press and hold the recirculation control and rear window defogger buttons, and turn the ignition switch to ON (II).

3. The recirculation indicator turns on for 2 seconds, then the self-diagnostic function begins.
NOTE:

- The blower motor will run at various speeds when in the self-diagnostic mode.

- 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

When the problem is repaired, DTCs will automatically clear.