Running the Self-diagnosis Function

Turn the ignition switch ON (II).
Press the AUTO button and then the OFF button. Continue to hold both buttons down for 1 minute.

Fig 1: Locating AUTO & OFF Buttons
Courtesy of AMERICAN HONDA MOTOR CO., INC.

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.

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. The temperature indicator will then alternate every second between displaying "88" (all segments lit) and the error code segment (A through N).

To determine the meaning of the DTC, refer to the DTC Troubleshooting Index for CLIMATE CONTROL SYSTEM . If there is no abnormality, the segments will not light up.

NOTE: If there are no DTC's 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 (see CIRCUIT DIAGRAM ).

Fig 2: Identifying Temperature Indicator
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Cancelling The Self-Diagnosis Function
Turn the ignition switch OFF to cancel the self-diagnosis function. After completing repair work, run the self-diagnosis function again to make sure that there are no other malfunctions.