How to Retrieve a DTC

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

1. Set the mode control dial on the Vent position.
2. Turn the ignition switch to ON (II).
3. Within 5 seconds after turning the ignition switch on, press the recirculation control switch the required number of times depending on the recirculation indicator status:
   • If the indicator is ON, press the recirculation control switch 5 times.
   • If the indicator is OFF, press the recirculation control switch 6 times.

   The recirculation indicator will come on for 2 seconds, then blink the Diagnostic Trouble Code (DTC) to indicate a faulty component. If no DTCs are found, the indicator will not blink after lighting for the initial 2 seconds.

   Fig 1: Identifying Recirculation Indicator, Recirculation Control Switch And Mode Control Dial

   Courtesy of AMERICAN HONDA MOTOR CO., INC.

   Example of DTC Indication Pattern (DTC 2) 

   Fig 2: Identifying Blinking Pattern

   Courtesy of AMERICAN HONDA MOTOR CO., INC.

   Canceling the Self-diagnostic Function 

4. 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 malfunctions.