Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode B - Control Unit Not Communicating (2017 2018 2019)

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. Connect the HDS to the data link connector (DLC)

2. Using the HDS, select the system that has the symptom from the BODY ELECTRICAL SYSTEM SELECT menu.

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

1. -

   If any loss of communication DTCs are indicated, go to step 4.

2. -

   If no loss of communication DTCs are not indicated, faulty MICU; replace the under-dash fuse/relay box .

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

• MICU
• Climate control unit
• Door multiplex control unit
• Keyless access/TPMS control unit
• Automatic lighting/rain sensor (with automatic wiper)
• Automatic lighting control unit-sensor (without automatic wiper)
• Power seat control unit
• Parking and back-up sensor control unit
• Ventilated seat control unit
• Rear seat heater control unit
• Left side BSI radar unit
• Right side BSI radar unit