Troubleshooting - B-CAN System Diagnosis Test Mode B

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 (see TROUBLESHOOTING - 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.

   Are any loss of communication DTCs indicated? 

   YES  -Go to step 3.

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

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

   Unit not communicating
   Driver's MICU (see DRIVER'S MICU  )
   Gauge control module (see GAUGE CONTROL MODULE INPUT TEST )
   Immobilizer-keyless control unit (see IMMOBILIZER-KEYLESS CONTROL UNIT INPUT TEST )
   Passenger's MICU (see MICU INPUT TEST  )
   Door multiplex control unit (see POWER WINDOW MASTER SWITCH INPUT TEST )
   Climate control unit (see CLIMATE CONTROL POWER AND GROUND CIRCUIT TROUBLESHOOTING )
   Audio-navigation unit (see NAVIGATION UNIT CONNECTOR FOR INPUTS AND OUTPUTS )
   Navigation display unit (see NAVIGATION DISPLAY UNIT CONNECTOR FOR INPUTS AND OUTPUTS )
   Power seat control unit (see POWER SEAT CONTROL UNIT INPUT TEST/REPLACEMENT )
   AcuraLink control unit (see MESSAGE DELETE PROCEDURE )
   HandsFreeLink control unit (see SYSTEM DESCRIPTION )
   Power tailgate control unit (see CONTROL UNIT INPUT TEST/REPLACEMENT )