How To Check For DTCs with the Honda Diagnostic System (HDS) ('06-09 model)

Connect the Honda Diagnostic System (HDS) to the Data Link Connector (DLC) (A) located behind the driver's side of the front console.
NOTE: For specific operations, refer to the user's manual that came with the Honda Diagnostic System (HDS).

Fig 1: Identifying Data Link Connector
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Make sure the HDS communicates with the vehicle and the gauge assembly. If it doesn't, troubleshoot the DLC circuit (see DLC CIRCUIT TROUBLESHOOTING ).
Select the TEST MODE MENU and check for Diagnostic Trouble Code (DTCs), and note them. Refer to the Troubleshooting Index and begin the appropriate troubleshooting procedure.