Troubleshooting - B-CAN System Diagnosis Test Mode B

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

Perform this diagnosis if any of the control units are not communicating (Not Available is displayed in the HDS) as found by the B-CAN System Diagnosis Test Mode A.

Using the HDS, select the system that has the symptom from the BODY ELECTRICAL SYSTEM SELECTION MENU.
Select DTCs, and then check for loss of communication DTCs.
Are any 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.

TROUBLESHOOTING CHART

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 )
Display panel control unit (see DISPLAY PANEL 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 )
Automatic lighting control unit (see AUTOMATIC LIGHTING CONTROL UNIT INPUT TEST )
AcuraLink control unit (XM receiver) (see ACURALINK CONTROL UNIT (XM RECEIVER) CONNECTOR FOR INPUTS AND OUTPUTS (USA MODELS WITH NAVIGATION) )