Navi ECU

This diagnosis looks for problems in the navigation ECU. When you start this diagnosis, the audio-navigation unit may freeze or delay up to a minute while the diagnosis runs.

• Displays the result of the access to the DRAM (OK/NG). If DRAM shows NG, replace the audio-navigation unit (see AUDIO-NAVIGATION UNIT REMOVAL/INSTALLATION ).
• Program Version: Displays the version of the navigation software.
• Model: For this model, the field should begin with TM8.
• Serial No.: Displays the audio-navigation unit serial number. That should be the same as the serial number found on the upper side of the audio-navigation unit.
• Flash: Displays the result of the access to the flash memory (OK/NG). If it is NG, replace the audio-navigation unit (see AUDIO-NAVIGATION UNIT REMOVAL/INSTALLATION ).
  Fig 1: Navigation Display - Navi ECU

  Courtesy of AMERICAN HONDA MOTOR CO., INC.

HFL 

This diagnosis checks first whether the HandsFreeLink control unit is connecting to the audio-navigation unit via the GA-Net. If the HFL and GA-NET shows NG, go to HandsFreeLink control unit Input Test (see CONTROL UNIT INPUT TEST/REPLACEMENT ). Then checking the HandsFreeLink control unit status. If the HFL shows B1792, go to HFL DTC B1792 troubleshooting (see DTC B1792: HANDSFREELINK CONTROL MODULE ERROR (WITH NAVIGATION) ).

Fig 2: Navigation Display - HFL

Courtesy of AMERICAN HONDA MOTOR CO., INC.