How to Retrieve a DTC

The heater control panel has a self-diagnosis function. To run the self-diagnosis function, do the following:

1. Turn the ignition switch ON (II).
2. Turn the fan switch OFF.
3. Press the recirculation control button to select Recirculation (recirculation indicator comes on).
4. Press and hold the recirculation control button to select Fresh (recirculation indicator goes off). Continue to hold the button. The recirculation indicator comes on for 2 seconds, and then goes off.
5. After recording the DTC, release the recirculation control button:
   • If the system is OK, the recirculation indicator stays off.
   • If any trouble is found, the recirculation indicator blinks the diagnostic trouble code (DTC) to indicate a faulty circuit or component.
   Fig 1: Identifying Recirculation Button & Recirculation Indicator

   Courtesy of AMERICAN HONDA MOTOR CO., INC.
   Fig 2: Example Of DTC Indicator Pattern (DTC 2)

   Courtesy of AMERICAN HONDA MOTOR CO., INC.

   Cancelling The Self-Diagnosis Function 

6. 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.