Troubleshooting - B-CAN System Diagnosis Test Mode A
Multiplex Integrated Control System Troubleshooting - B-CAN System Diagnosis Test Mode A
NOTE: AcuraLink can be used to easily check for B-CAN line failure AcuraLink Self-Diagnostic Function.
Check the PCM for DTCs and troubleshoot PCM Initial Inspection and Diagnostic Overview 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
- Rear window defogger
- HandsFreeLink
- Horns (security and panic)
- Chimes (key, seat belt, lights-on, and parking brake)
- Power windows
- Power window/moonroof timer
- Wiper/washer
- Security
- Keyless entry
- Power door locks
- Climate control
- Key interlock
- Dashlight brightness
- Driving position memory system
- Keyless access
- 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).
3. From the BODY ELECTRICAL SYSTEM SELECT menu, select B-CAN CONTROL UNITS INFORMATION, and then select CHECK CONNECTED CONTROL UNITS listed to see if the following control units are communicating with the HDS.
- MICU
- Gauge control module
- Combination switch control unit
- Relay control module
- Power seat control unit (HDS name: Memory Seat Control Unit)
- HandsFreeLink control unit
- Driver's MPCS unit
- Immobilizer unit
- Adaptive front lighting control unit
- AcuraLink control unit (XM receiver) (HDS name: HIP (Honda Information Platform)
- Keyless access control unit
- Climate 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 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 B1000.
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 that is malfunctioning does not stop or turn off, go to B-CAN System Diagnosis Test Mode C Troubleshooting - 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 run or turn on, go to B-CAN System Diagnosis Test Mode D Troubleshooting - B-CAN System Diagnosis Test Mode D.
- Exterior lights
- Turn signals
- Entry light control
- Interior lights
- Horns (security and panic)
- Power windows
- Wiper/washer
- 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, seat belt and lights-on)
- Rear window defogger (climate control)
- Security
- Keyless entry
- Climate control
- Key interlock
- Dashlight brightness
- Audio system
- Navigation
- Driving position memory system
- HandsFreeLink
- Keyless access
- Adaptive front lighting
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. Begin troubleshooting with the lowest number first (Example: if DTC B1005 and B1008 are retrieved, begin by troubleshooting B1005).
- Signal error DTCs.