Troubleshooting - B-CAN System Diagnosis Test Mode B

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Do this diagnosis if any of the control units are not communicating (NOT AVAILABLE is displayed on the HDS) as found by the B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ).

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.
Are any loss of communication DTCs indicated?

YES -Go to step 3.

NO -Faulty MICU; replace the driver's under-dash fuse/relay box, USA modes (see DRIVER'S UNDER-DASH FUSE/RELAY BOX (MICU) REMOVAL AND INSTALLATION ), Canada models (see CANADA MODELS ).

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

B-CAN SYSTEM TROUBLESHOOTING CHART

Unit not communicating
MICU (see MICU )
Gauge control module (see GAUGE CONTROL MODULE INPUT TEST )
Immobilizer-keyless control unit (see IMMOBILIZER-KEYLESS CONTROL UNIT INPUT TEST )
Rear MICU (see REAR MICU )
Door multiplex control unit (see POWER WINDOW MASTER SWITCH INPUT TEST )
Climate control unit (see CLIMATE CONTROL UNIT POWER AND GROUND CIRCUIT TROUBLESHOOTING )
Audio-navigation unit (see NAVIGATION UNIT CONNECTOR FOR INPUTS AND OUTPUTS )
Audio unit (see AUDIO UNIT CONNECTOR FOR INPUTS AND OUTPUTS (WITH NAVIGATION) )
Power seat control unit (see POWER SEAT CONTROL UNIT INPUT TEST/REPLACEMENT )
HandsFreeLink control unit (see CONTROL UNIT INPUT TEST )
Power tailgate control unit (see CONTROL UNIT INPUT TEST/REPLACEMENT )
BSI control unit (see BLIND SPOT INFORMATION SYSTEM (BSI) CONTROL UNIT INPUTS AND OUTPUTS )
Relay control module (see UNDER-HOOD FUSE/RELAY BOX (RELAY CONTROL MODULE PART) )
Headlight leveling control unit (see HEADLIGHT LEVELING CONTROL UNIT INPUT TEST/REPLACEMENT ) Left power sliding door control unit (see CONTROL UNIT INPUT TEST )
Right power sliding door control unit (see CONTROL UNIT INPUT TEST )
Seat heater control unit (see SEAT HEATER CONTROL UNIT INPUT TEST/REPLACEMENT )
Parking and back-up sensor control unit (see PARKING AND BACK-UP SENSOR CONTROL UNIT INPUT TEST/REPLACEMENT )
Navigation display unit (see NAVIGATION DISPLAY UNIT CONNECTOR FOR INPUTS AND OUTPUTS )
Audio display unit - USB adapter control unit (see AUDIO DISPLAY UNIT CONNECTOR FOR INPUTS AND OUTPUTS (WITHOUT USB ADAPTER) )