Troubleshooting - B-CAN System Diagnosis Test Mode A

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2015 Honda Crosstour, 2014 Honda Crosstour, 2013 Honda Crosstour, 2012 Honda Crosstour, and 2011 Honda Accord Crosstour. However, it is still accessible from the selected car via links, so may be relevant.

Check the PCM for DTCs and troubleshoot 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.

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)
- Beepers (key-in, seat belt, lights-on, and parking brake)
- Power window/moonroof timer
- Wiper/washer
- Security
- Keyless entry
- Power door locks
- Key interlock
- Dashlight brightness
- Immobilizer
- Driving position memory system (HDS name: Memory seat control unit)
- HandsFreeLink
  Is the symptom related to the B-CAN system?
  
  YES -Go to next step.
  
  NO -Go to the system troubleshooting for the system with the symptom.
Connect the HDS to the data link connector (A), then turn the ignition switch to ON (II).

Fig 1: Identifying Data Link Connector Location
Courtesy of AMERICAN HONDA MOTOR CO., INC.
From the BODY ELECTRICAL menu, select B-CAN CONTROL UNITS INFORMATION, and then select CONNECTED UNITS listed to see if the following control units are communicating with the HDS.
- Driver's MICU
- Passenger's MICU
- Door multiplex control unit (HDS name: Power window unit)
- Gauge control module
- Immobilizer-keyless control unit
- Climate control unit
- HandsFreeLink control unit
- Power seat control unit (HDS name: Memory seat 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 next step.
  
  NO -If any of the control units are not communicating, go to 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 .
Select the system that has the problem from the BODY ELECTRICAL menu, then select DTCs.
Are any DTCs indicated?

YES -Go to next step.

NO -If the problem is related to one of the following items and the system that is malfunctioning does not stop or turn off, go to B-CAN SYSTEM DIAGNOSIS TEST MODE C . If the problem is related to one of the following items and the system that is malfunctioning does not work or turn on, go to B-CAN SYSTEM DIAGNOSIS TEST MODE D .
- Exterior lights
- Turn signals
- Entry lights
- 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
- Beepers (key-in, seat belt, lights-on, and parking brake)
- Security
- Keyless entry
- Key interlock
- Dashlight brightness
- Audio system
- Navigation (if equipped)
- HandsFreeLink
- Immobilizer
- Driving position memory system
- Rear window defogger (climate control)
- Climate control
Record all DTCs, and sort them by DTC type into these categories:
- Battery voltage DTCs.
- Internal error DTCs.
- Loss of communication DTCs.
- Signal error DTCs.
Troubleshoot the DTC(s) in the order listed above.