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.

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

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

3.
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
Keyless access control unit
Immobilizer-keyless control unit
Multipurpose camera unit