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LIN COMMUNICATION SYSTEM, Diagnostic DTC:B278C

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DTC Code DTC Name
B278C Lost Communication with Power Source Control
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DESCRIPTION

This DTC is stored when LIN communication between the certification ECU (smart key ECU assembly) and power management control ECU stops for 10 seconds or more.

DTC No. Detection Item DTC Detection Condition Trouble Area
B278C Lost Communication with Power Source Control An internal malfunction occurs in the certification ECU (smart key ECU assembly). Certification ECU (smart key ECU assembly)
Tip:

The power management control ECU is built into the certification ECU (smart key ECU assembly).

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CAUTION / NOTICE / HINT

Note:

  • Before replacing the certification ECU (smart key ECU assembly), refer to Service Bulletin.

  • When using the GTS with the engine switch off, connect the GTS to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins. Then select Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Entry&Start(CAN). While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.

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PROCEDURE


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    CLEAR DTC


    1. Clear the DTCs.

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      1. Body Electrical > Entry&Start > Clear DTCs


      Result
      Proceed to
      NEXT

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    CHECK FOR DTC


    1. Check for DTCs.

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      1. Body Electrical > Entry&Start > Trouble Codes


      OK
      DTC B278C is not output.
      Result
      Proceed to
      OK
      NG

    • OK

      USE SIMULATION METHOD TO CHECKClick here

    • NG

      REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)