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
   • Exterior lights
   • Turn signals
   • Entry light control
   • Interior lights
   • Safety indicators
   • Horns (security and panic)
   • Chimes (key-in, seat belt, lights-on, and parking brake)
   • Power window/moonroof timer
   • Wiper/washer
   • Security
   • Keyless entry
   • Power door locks
   • Key interlock
   • Dash light brightness
   • Immobilizer
   • Daytime running lights
   • Driving position memory system
   • XM radio

     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 UNIT INFORMATION, and then select CONNECTED UNIT listed to see if the following control units are communicating with the HDS
   • Driver's MICU
   • Passenger's MICU
   • Door multiplex control unit
   • Gauge control module
   • Immobilizer-keyless control unit
   • Climate control unit
   • HandsFreeLink control unit
   • Audio unit
   • Power seat control unit
   • AcuraLink 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 status one time when BODY ELECTRICAL is selected To recheck the status after repair, reboot the HDS

   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 driver's MICU is communicating, go to DTC U1280 troubleshooting (see DTC U1280: COMMUNICATION BUS LINE ERROR (BUS-OFF) )

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

   Are any DTCs indicated? 

   YES  -Go to step 5

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

   • Exterior lights
   • Turn signals
   • Entry light control
   • Interior lights
   • Horns (security and panic)
   • Wiper/washer
   • Power window
   • Power door locks

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

   • Gauge control module
   • Safety indicators
   • Chimes (key-in, seat belt, lights-on, and parking brake)
   • Security
   • Keyless entry
   • Key interlock
   • Dash light brightness
   • Audio system
   • Navigation (if equipped)
   • HandsFreeLink
   • Immobilizer
   • Driving position memory system
5. Record all DTCs, and sort them by DTC type
6. Troubleshoot the DTC(s) in this order
   • Battery voltage DTCs
   • Internal error DTCs
   • Loss of communication DTCs
   • Signal error DTCs