How to Use the Self-diagnostic Function without the HDS

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

1. Turn the ignition switch to LOCK (0) and then back to ON (II), or press the engine start/stop button to select the OFF mode and then the ON mode
2. Press and hold the FAN ON/OFF button, then within 10 seconds press and release the REAR WINDOW DEFOGGER/MIRROR DEFOGGER button five times Release the FAN ON/OFF button, then the self-diagnostic begins
   NOTE:

   • The blower motor runs at various speeds regardless of what the panel is displaying
   • If there is a problem with the system, it will flash AUTO, 88 and AUTO, 88 and WINDSHIELD DEFROST, or 88 and MODE, and one or more of the 14 indicator segments (A through N) Refer to CHECKING FOR DTCS 
   • 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 do not illuminate, and the system appears to be turned off
   Fig 1: Identifying Fan ON/OFF Button And Rear Window Defogger /Mirror Defogger Button
   Courtesy of AMERICAN HONDA MOTOR CO., INC.

   Canceling the Self-diagnostic Function 

3. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode 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