LIN COMMUNICATION SYSTEM, Diagnostic DTC:B278C

DTC Code DTC Name
B278C Lost Communication with Power Source Control

DESCRIPTION

DTC No. DTC Detection Condition Trouble Area
B278C An internal malfunction occurs in the certification ECU (smart key ECU assembly)

  • Certification ECU (smart key ECU assembly)

CAUTION / NOTICE / HINT

Note


  • If the certification ECU (smart key ECU assembly) is replaced, refer to Service Bulletin.

  • When using the GTS to troubleshoot with the power switch off:

    Connect the GTS to the DLC3, and turn the courtesy switch on and off at 1.5-second intervals until communication between the GTS and vehicle begins.

PROCEDURE


  1. CLEAR DTC


    1. Clear the DTCs Click here.


    NEXT

  2. CHECK DTC


    1. Check for DTCs Click here.

      OK
      DTC B278C is not output.

    OK

    USE SIMULATION METHOD TO CHECK Click here

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)