LIN COMMUNICATION SYSTEM, Diagnostic DTC:B278C

DTC Code DTC Name
B278C Lost Communication with Power Source Control

DESCRIPTION

When an internal malfunction is detected in the certification ECU (smart key ECU assembly), this DTC will be output. This DTC is also stored as a past DTC.

DTC No. Detection Item DTC Detection Condition Trouble Area
B278C Lost Communication with Power Source Control Certification ECU (smart key ECU assembly) internal malfunction Certification ECU (smart key ECU assembly)

CAUTION / NOTICE / HINT

Note


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

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

  • Before replacing the certification ECU (smart key ECU assembly) or steering lock actuator assembly, refer to the entry and start system (for start function).

PROCEDURE


  1. CLEAR DTC


    1. Clear the DTCs.

      Click here


      Body Electrical > Entry&Start > Clear DTCs
      Result
      Result
      NEXT

    NEXT

  2. CHECK FOR DTC


    1. Check for DTCs.

      Click here


      Body Electrical > Entry&Start > Trouble Codes
      Result
      Proceed to
      DTC B278C is output
      DTC B278C is not output

    DTC B278C is output

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    DTC B278C is not output

    USE SIMULATION METHOD TO CHECK Click here