Troubleshooting - B-CAN System Diagnosis Test Mode B

WARNING: This page is about a different car, the 2008 Acura TSX, 2007 Acura TSX, 2006 Acura TSX, 2005 Acura TSX, and 2004 Acura TSX. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

Perform this diagnosis if any of the control units are not communicating (NONE displayed in the HDS.) as found by the B-CAN system Diagnosis Test Mode A.
Always cycle the ignition switch within 3 seconds when prompted in the DTC troubleshooting procedures in this article.

Using the Honda Diagnostic System (HDS), select the system that has the symptom from the BODY ELECTRICAL MENU.
Select DTCs, and then check for loss of communication DTCs (use the DTC Troubleshooting to find the DTC type).
Are loss of communication DTCs indicated?

YES -Go to step 3.

NO -Replace the MICU.

Perform the input test for the unit not communicating with the HDS.

INPUT TEST FOR UNIT NOT COMMUNICATING WITH HDS

Unit not communicating
MICU (see MICU INPUT TEST )
Door multiplex control unit (see DOOR MULTIPLEX CONTROL UNIT INPUT TEST )
Gauge control module (see GAUGE CONTROL MODULE INPUT TEST )
Relay control module (see RELAY CONTROL MODULE INPUT TEST )
Climate control unit (see CLIMATE CONTROL UNIT INPUT TEST )
Combination switch control unit (see COMBINATION SWITCH CONTROL UNIT INPUT TEST )
Power seat control unit (see POWER SEAT CONTROL UNIT INPUT TEST )
HandsFreeLink control unit (see CONTROL UNIT INPUT TEST/REPLACEMENT )