B-CAN System Diagnosis Test Mode B - Control Unit Not Communicating (2018-19)

Do 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 - Refer to: Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode A - Initial Communication and DTC Checks (2018-19) .

1. Using the HDS, select the system that has the symptom from the BODY ELECTRICAL SYSTEM SELECT menu

2. Select DTCs, and then check for loss of communication DTCs.

• If any loss of communication DTCs are indicated, go to step 3.
• If any loss of communication DTCs are not indicated, faulty MICU; replace the under-dash fuse/relay box .

3. Perform the power, ground, and communication part of the input test for the unit (s) not communicating with the HDS.