DTC B278C: Lost Communication with Power Source Control [08/2013 - ]: Procedure

1. Clear the DTCs.

   Refer to DTC CHECK / CLEAR [08/2013 - ]

   Body Electrical > Smart Key > Clear DTCs 

   Result

   Proceed to
   NEXT

Result:  1

NEXT 

See step  2

1. Check for DTCs.

   Refer to DTC CHECK / CLEAR [08/2013 - ]

   Body Electrical > Smart Key > Trouble Codes 

   OK

   DTC B278C is not output.

   Result

   Proceed to
   OK
   NG

Result:  1

OK 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [08/2013 - 04/2014]  Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [04/2014 - 08/2016]  Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [08/2016 - 08/2017]  Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [08/2017 - ] 

Result:  2

NG 

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to  REMOVAL [08/2013 - ]