How to Check for DTCs With the HDS

There are three methods used to check for DTCs. The recommended method is to use the Honda Diagnostic System (HDS) with the appropriate software, plugged into the data link connector (DLC).

The second method is to run the self-diagnostic function built into the climate control unit.

The third method is to use the B-CAN system diagnosis test mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ).

1. Make sure the ignition switch is in LOCK (0).
2. Connect the HDS to the data link connector (DLC) (A) located under the driver's side of the dashboard.
   Fig 1: Identifying Data Link Connector (DLC)

   Courtesy of AMERICAN HONDA MOTOR CO., INC.
3. Turn the ignition switch to ON (II).
4. Make sure the HDS communicates with the vehicle and the climate control unit. If it does not, troubleshoot the DLC circuit (see DLC CIRCUIT TROUBLESHOOTING ).
5. Select HVAC/CLIMATE CONTROL in the BODY ELECTRICAL menu.
6. Select DTCs in the HVAC/CLIMATE CONTROL menu.
7. Check for DTCs. If any DTCs are indicated, write down the DTCs, then go to the INDICATED DTC TROUBLESHOOTING . If no DTCs are indicated, refer to SYMPTOM TROUBLESHOOTING  .
   NOTE:

   • After troubleshooting, clear the DTCs with the HDS.
   • For specific operations, refer to the user's manual that came with the HDS.