General Troubleshooting Information

General Troubleshooting Information

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 ignition switch to LOCK (0), and then ON (II).
2. Set the FAN CONTROL dial OFF, the TEMPERATURE CONTROL dial on Max Cool, and select the VENT mode.
3. Turn the ignition switch to LOCK (0), and then ON (II).
4. Press and hold the RECIRCULATION CONTROL button, then press the REAR WINDOW DEFOGGER button five times within 10 seconds. Release the RECIRCULATION CONTROL and REAR WINDOW DEFOGGER buttons; the recirculation indicator blinks two times, then the self-diagnostic 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.

1 - 9:

Clear the DTCs
When the problem is repaired, DTCs will automatically clear.

Max Cool Position Function
When the mode control button is in the MAX A/C position, the HVAC control unit will automatically select the recirculation mode and turn the A/C on. If the recirculation switch is pressed when in MAX A/C, MAX A/C turns off. If A/C is pressed when in MAX A/C, the A/C turns off.