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 perform this diagnosis if the symptom is related to the B-CAN system.

NOTE:

If the HDS is not available, do the Test Mode land Test Mode 2 (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE 1 AND TEST MODE 2 (WITHOUT THE HDS) ).
Always cycle the ignition switch within 3 seconds when prompted in the DTC troubleshooting procedures.

Compare the symptom with this list of B-CAN related systems:
- Gauge control module
- Exterior lights
- Turn signals
- Entry light control
- Interior lights
- Door-open and trunk-open 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 control
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.
Connect the HDS to the data link connector (A), then turn the ignition switch ON (II).

Fig 1: Connecting HDS To Data Link Connector
Courtesy of AMERICAN HONDA MOTOR CO., INC.
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.
- MICU
- Gauge control module
- Immobilizer-keyless control unit
- Climate control unit
NOTE:
- If one or more of the units are not communicating with the HDS, DETECT will be displayed.
- If the unit is not communicating or the vehicle is not equipped, "Not Available" will be displayed.
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 . If all units are not communicating or only the MICU is communicating, go to DTC B1000 TROUBLESHOOTING .
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, go to B-CAN SYSTEM DIAGNOSIS TEST MODE C if the system does not stop or turn off. Go to TEST MODE D if the system does not run or turn on.
- Exterior lights
- Turn signals
- Entry light control
- Interior lights
- Horn (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
- Door-open and trunk-open indicators
- Chimes (key-in, seat belt, lights-on, and parking brake)
- Security
- Keyless entry
- Key interlock
- Dash light brightness control
- Audio system
- Navigation (if equipped)
Record all DTCs, and sort them by DTC type.
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 B1008 and B1011 are retrieved, begin by troubleshooting B1008).
- Signal error DTCs.