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 BODY ELECTRICAL.
2. Select DTCs, and then check for loss of communication DTCs. Refer to LOSS OF COMMUNICATION DTC CROSS-REFERENCE TABLE .

   Are any loss of communication DTCs indicated? 

   YES  - Go to step  3.

   NO  - Replace the MICU. ■

3. Do the power, ground, and communication part of the input test for the unit not communicating with the HDS.
   UNIT COMMUNICATING REFERENCE TABLE
   
   

   Unit Not Communicating
   MICU (see CONTROL UNIT INPUT TEST )
   Gauge control module (see GAUGE CONTROL MODULE INPUT TEST )
   Automatic lighting control unit (see AUTOMATIC LIGHTING CONTROL UNIT INPUT TEST/REPLACEMENT )
   Door multiplex control unit (see POWER WINDOW MASTER SWITCH INPUT TEST )
   Power seat control unit (see POWER SEAT CONTROL UNIT INPUT TEST/REPLACEMENT )
   Parking and back-up sensor control unit (see PARKING AND BACK-UP SENSOR CONTROL UNIT INPUT TEST/REPLACEMENT )
   Power tailgate control unit (see CONTROL UNIT INPUT TEST/REPLACEMENT )
   HandsFreeLink control unit (see HFL SYSTEM TROUBLESHOOTING )
   Climate control unit troubleshooting () (see CLIMATE CONTROL UNIT POWER, GROUND, AND COMMUNICATION CIRCUIT TROUBLESHOOTING )
   HVAC control unit () (see CLIMATE CONTROL UNIT POWER, GROUND, AND COMMUNICATION CIRCUIT TROUBLESHOOTING )