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, replace the body control module.?

3.
Do the power, ground, and communication part of the input test for the unit(s) not communicating with the HDS.
Body Control Module
Relay control module
Gauge control module
Climate control unit
Automatic lighting control unit-sensor
Keyless access control unit
Immobilizer-keyless control unit
Door multiplex control unit
Power tailgate control unit
Power seat control unit
Front seat heater control unit