With Scan Tool
How to Check for DTCs with the HDSNOTE: Before troubleshooting the climate control system, refer to the multiplex integrated control system test mode A.
1. Make sure the ignition switch is OFF.
2. Connect the HDS to the Data Link Connector (DLC) (A) located under the driver's side of the dashboard.
3. Turn the ignition switch ON (II).
4. Select DTCs in the body electrical climate control mode MENU of the HDS.
5. Check for DTCs. If a DTC is indicated, go to the next step. If no DTC(s) is indicated, refer to symptom troubleshooting.
6. Turn the ignition switch OFF.
7. Disconnect the HDS from the DLC.
8. Do the troubleshooting procedure for the DTC indicated.
How to Retrieve a DTC (Without HDS)
The audio-HVAC display panel has a self-diagnosis function for climate control. To run the self-diagnosis function, do the following:
NOTE: Before troubleshooting the climate control system, refer to the multiplex integrated control system test mode A.
1. Turn the ignition switch ON (II).
2. Press the AUTO button and then the OFF button. Continue to hold both buttons down for 1 minute.
If there is any problems in the system, the temperature indicator will light up the segment (A through Q) corresponding to the error. The temperature indicator will then alternate every second between displaying "88" (all segments lit) and the error code segment (A through Q).
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. If no segments light up, the system is still not operating properly, check the sensor inputs to the climate control unit, or refer to symptom troubleshooting.