How to Retrieve a DTC

WARNING: This page is about a different car, the 2006 Acura MDX, 2005 Acura MDX, 2004 Acura MDX, and 2003 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.

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

Turn the ignition switch ON (II).
Press the AUTO button and then the OFF button.

Fig 1: Identifying AUTO And OFF Button
Courtesy of AMERICAN HONDA MOTOR CO., INC.

If there is any abnormality in the system, the temperature indicator will light up the segment (A through N) 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 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 . 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.

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

Canceling the Self-diagnostic Function
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.