Climate Control

General Troubleshooting Information

Climate Control System

How to Retrieve a DTC
The climate control unit has a self-diagnostic function.

Running the Self-diagnostic Function

1. Turn the ignition switch ON (II).
2. Set the driver's temperature control dial on MAX Cool.
3. Press and hold the OFF button.
4. While holding the OFF button, press the AUTO button five times within 10 seconds. The self-diagnosis begins.






If there is any abnormality in the system, the temperature indicator will light up the segment (A through N) corresponding to the error. If no DTCs are found, go to symptom troubleshooting index. Climate Control The temperature indicator will then alternate every second between displaying "88" (all segments lit) and the error code segment (A through N).

NOTE: The system will only display the DTC when the AUTO and OFF buttons are pressed. If you release the buttons, the display will go blank. To return the display, simply press the AUTO then the OFF buttons again.

To determine the meaning of the DTC, refer to the DTC troubleshooting index. DTC List - Climate Control If there is no abnormality, the segments will not light up.

NOTE: If there are no DTCs detected (no opens or shorts in the climate control circuits or sensors), and the system is still not operating properly, check the sensor input to the climate control unit.






Canceling the Self-diagnostic Function

5. Turn the ignition switch OFF 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.

Climate Control Systems

To retrieve the DTC, you must run the self-diagnostic function. In the case of multiple problems, the respective indicator segments will come on. If indicator segments A, C, E, G, I, and L come on at the same time, there may be an open in the common ground wire of the sensors.






Rear Heater-A/C Control System

How to Retrieve a DTC
The climate control unit has a self-diagnostic function. To run the self-diagnostic function, do the following:

1. Turn the ignition switch ON (II).
2. Turn the temperature control knob to LO for about 20 seconds, then HI for about 20 seconds.
3. Press the OFF button, then press the recirculation control button to select Recirculation (recirculation indicator comes on).
4. Press and hold the recirculation control button to select Fresh (recirculation indicator goes off). Continue to hold the button for 10 seconds. The recirculation indicator comes on for 2 seconds, and the self-diagnosis begins.
- If the system is OK, the recirculation indicator stays off.
- If any trouble is found, the recirculation indicator blinks the diagnostic trouble code (DTC) to indicate a faulty circuit or component.

5. After recording the DTC, release the recirculation control button.

To determine the meaning of the DTC, refer to the DTC troubleshooting index DTC List - Rear Heater-A/C Control System for rear heater-A/C control system.






Canceling the Self-diagnostic Function

6. Turn the ignition switch OFF 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.

Rear Heater-A/C Control System

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In case of multiple problems, the recirculation indicator will indicate only the DTC with the least number of blinks.

In case of an intermittent failure, the climate control unit will store the DTC until the ignition switch is turned off.