Test Mode 1

Check the PCM for DTCs and troubleshoot PCM (see GENERAL TROUBLESHOOTING INFORMATION ) or F-CAN loss of communication errors first, then perform this diagnosis if the HDS is not available.

1. Check the No. 23 (10 A) fuse in the under-hood fuse/relay box and the No. 10 (7.5 A) fuses in the under-dash fuse/relay box.

   Are the fuses OK? 

   YES  -Go to step 2.

   NO  -Replace the fuses. If the fuse blows again, repair the short to ground on the fuse circuit(s).

2. Turn the ignition switch to ON (II), and move the interior light switch to the middle (DOOR) position.
3. Connect the MPCS service connector (A) to the MICU service check connector socket (B) in the under-dash fuse/relay box.
   Fig 1: Connecting MPCS Service Connector

   Courtesy of AMERICAN HONDA MOTOR CO., INC.
4. Wait 5 seconds, and watch the individual map lights. When the lights flash quickly once, and then go off, the system is in Test Mode 1.
5. Check for B-CAN DTCs indicated by the gauge control module LCD display while still in Test Mode 1. Push the SEL/RESET button to display the next code. After you get to the last code, the display shows END. If no DTCs are stored, the display will read NO.

   Are any DTCs indicated? 

   YES  -Go to Step 6.

   NO  -Go to Step  1 under Test Mode 2.

6. Record all DTCs and sort them.
7. Troubleshoot the DTCs in this order:
   • Battery voltage DTCs
   • Internal error DTCs
   • Loss of communication DTCs
   • Signal error DTCs
8. Clear the DTCs by pressing and holding the SEL/RESET button for about 10 seconds. You will hear a beep to confirm the codes have been cleared.

   Operate the devices that failed, and recheck for codes.