How to Use the Self-Diagnostic Function without the HDS

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2015 Honda Crosstour, 2014 Honda Crosstour, 2013 Honda Crosstour, 2012 Honda Crosstour, and 2011 Honda Accord Crosstour. 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 to LOCK (0), and then to ON (II).
Press and hold the ON/OFF button, then within 10 seconds press and release the REAR WINDOW DEFOGGER/MIRROR DEFOGGER button five times. Release the ON/OFF button; then the self-diagnostic begins.
NOTE:
- The blower motor will run at various speeds regardless of what the panel is displaying.
- If there is a problem with the system, the temperature indicator flashes 88, and the A/CON indicator or the AUTO indicator (or both) also flashes. Segments in the temperature indicator then indicate which DTCs are present.
- If there is more than one DTC, they are displayed one at a time in sequence followed by a pause (all the display indicator segments illuminate) between the DTCs.
- If there are no problems detected, the segments will not illuminate, and the system will appear to be turned off.
  
  Fig 1: Identifying Self-Diagnostic Function Buttons ('10 Model)
  Courtesy of AMERICAN HONDA MOTOR CO., INC.
  
  Fig 2: Identifying Self-Diagnostic Function Buttons ('11-12 Models)
  Courtesy of AMERICAN HONDA MOTOR CO., INC.

Canceling the Self-Diagnostic Function

Turn the ignition switch to LOCK (0) to cancel the self-diagnostic function. After completing repair work, run the self-diagnostic function again to make sure that there are no other DTCs.