Troubleshooting - B-CAN System Diagnosis Test Mode A

Check the ECM/PCM for DTCs and troubleshoot ECM/PCM (see GENERAL TROUBLESHOOTING INFORMATION ) or F-CAN loss of communication errors first, then do this diagnosis if the symptom is related to the B-CAN system.

1. Compare the symptom with this list of B-CAN related systems: Gauge control module
   • Gauge control module
   • Exterior lights
   • Entry light control
   • Horns (security and panic)
   • Wiper/washer
   • Security
   • Keyless entry
   • Power door locks
   • Immobilizer
   • HandsFreeLink

     Is the symptom related to the B-CAN system? 

     YES  - Go to step  2.

     NO  - Go to the system troubleshooting for the system with the symptom.

2. Connect the HDS to the data link connector (A), then turn the ignition switch to ON (II).
   Fig 1: Identifying Data Link Connector

   Courtesy of AMERICAN HONDA MOTOR CO., INC.
3. From the BODY ELECTRICAL menu, select B-CAN CONTROL UNITS INFORMATION, and then select CONNECTED UNIT listed to see if the following control units are communicating with the HDS.
   • MICU
   • Gauge control module
   • Immobilizer-keyless control unit
   • HandsFreeLink control unit
   NOTE:

   • If a unit is communicating with the HDS, DETECT will be displayed.
   • If a unit is not communicating or the vehicle is not equipped, "Not Available" will be displayed.
   • The HDS only checks the connected units status one time when BODY ELECTRICAL is selected. To recheck the status after repair, reboot the HDS and repeat step  3.

   Are all control units communicating with the HDS? 

   YES  - Go to step  4.

   NO  - If any of the control units are not communicating, go to B-CAN System Diagnosis Test Mode B (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE B  ). If all units are not communicating or only the MICU is communicating, go to DTC B1000 troubleshooting (see DTC TROUBLESHOOTING  ).

4. Select the system that has the problem from the BODY ELECTRICAL menu, then select DTCs.

   Are any DTCs indicated? 

   YES  - Go to step  6.

   NO  - If the problem is related to one of the following items, go to B-CAN System Diagnosis Test Mode C (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE C  ) if the system does not stop or turn off. Go to Test Mode D (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE D  ) if the system does not run or turn on.

   • Exterior lights
   • Entry light control
   • Horns (security and panic)
   • Wiper/washer

   If the problem is related to one of the following items, go to the troubleshooting for that individual system.

   • Gauge control module
   • Security
   • Keyless entry
   • HandsFreeLink
5. Record all DTCs, and sort them by DTC type.
6. Troubleshoot the DTC(s) in the order listed below:
   • Battery voltage DTCs.
   • Internal error DTCs.
   • Loss of communication DTCs.
   • Signal error DTCs.