Troubleshooting - B-CAN System Diagnosis Test Mode B

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 (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A  ).

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

   Are any loss of communication DTCs indicated? 

   1. YES  - Go to step 3.
   2. NO  - Replace the MICU.
3. Perform the input test for the unit not communicating with the HDS.
   TROUBLESHOOTING B CAN SYSTEM
   
   

   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 )
   Combination switch control unit (see COMBINATION SWITCH CONTROL UNIT INPUT TEST )
   HVAC control unit (see HVAC CONTROL UNIT INPUTS AND OUTPUTS )
   Climate control unit (see CLIMATE CONTROL UNIT INPUTS AND OUTPUTS )