Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode B - Control Unit Not Communicating

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.

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

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.?

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

Unit not communicating
MICU
Gauge control module
Climate control unit
Automatic lighting control unit-sensor^*1
Automatic lighting/rain sensor^*2
Immobilizer-keyless control unit^*3
Keyless access control unit^*4
Power seat control unit
Door multiplex control unit
Auto high-beam control unit
Parking and back-up sensor control unit
Wireless charger

*1: With automatic lighting without automatic wiper
*2: With automatic lighting and automatic wiper
*3: Without keyless access system
*4: With keyless access system