IMMOBILISER SYSTEM, Diagnostic DTC:B2779

DTC Code DTC Name
B2779 Engine Starter Communication Malfunction

DESCRIPTION

When an internal malfunction occurs in the certification ECU (smart key ECU assembly), the certification ECU (smart key ECU assembly) stores this DTC.

DTC No. Detection Item DTC Detection Condition Trouble Area Note
B2779 Engine Starter Communication Malfunction An internal malfunction occurs in the certification ECU (smart key ECU assembly). Certification ECU (smart key ECU assembly)

DTC output confirmation operation:


  • Always
Vehicle Condition and Fail-safe Operation when Malfunction Detected
Vehicle Condition when Malfunction Detected Fail-safe Operation when Malfunction Detected
- -
Related Data List and Active Test
DTC No. Data List and Active Test
B2779 -

CAUTION / NOTICE / HINT

Note


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

  • After performing repairs, confirm that no DTCs are output by performing "DTC Output Confirmation Operation."

PROCEDURE


  1. CHECK CAN COMMUNICATION SYSTEM


    1. Check for CAN communication system DTCs.

      Click here

      OK
      CAN communication DTCs are not output.
      Result
      Proceed to
      OK
      NG

    NG

    GO TO CAN COMMUNICATION SYSTEM (DIAGNOSTIC TROUBLE CODE CHART) Click here

    OK

  2. READ VALUE USING GTS (WIRELESS C CODE)


    1. Turn the power switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the power switch on (IG).

    4. Turn the GTS on.

    5. Enter the following menus: Body Electrical / Entry&Start / Data List.

    6. Read the Data List according to the display on the GTS.


      Body Electrical > Entry&Start > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Wireless C Code Registration status between remote engine starter ECU and certification ECU (smart key ECU assembly) No Regd or Regd

      No Regd: Remote starter ID not registered to remote engine start ECU and certification ECU (smart key ECU assembly)

      Regd: Remote starter ID registered to remote engine start ECU and certification ECU (smart key ECU assembly)

      Problems may be caused by the following:


      • DTC B2779 is stored.

      • Remote engine start ECU registration has not been performed.

      • Malfunctions in the certification ECU (smart key ECU assembly) or remote engine start ECU.

      Body Electrical > Entry&Start > Data List
      Tester Display
      Wireless C Code
      Result
      Result Proceed to
      "No Regd" is displayed on the GTS A
      "Regd" is displayed on the GTS B

    B

    REPLACE REMOTE ENGINE STARTER ECU Click here

    A

  3. REGISTER REMOTE ENGINE STARTER ID


    1. Register the remote engine starter ID.

      Tech Tips

      Refer to Service Bulletin.

      Result
      Proceed to
      NEXT

    NEXT

  4. CHECK REMOTE ENGINE STARTER FUNCTION


    1. Check the remote engine starter function.

      OK
      Remote engine starter functions operate normally.
      Result
      Proceed to
      OK
      NG

    OK

    END (REMOTE ENGINE STARTER ID WAS NOT REGISTERED)

    NG

  5. REPLACE REMOTE ENGINE STARTER ECU


    1. Temporarily replace the remote engine starter ECU with a new one.

    2. Register the remote engine starter ID.

      Tech Tips

      Refer to Service Bulletin.

    3. Check the remote engine starter function.

      OK
      Remote engine starter functions operate normally.
      Result
      Proceed to
      OK
      NG

    OK

    END (REMOTE ENGINE STARTER ECU WAS DEFECTIVE)

    NG

  6. REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)


    1. Temporarily replace the main body ECU (multiplex network body ECU) with a new one.

      Click here

      Tech Tips

      Refer to Service Bulletin.

    2. Check the remote engine starter function.

      OK
      Remote engine starter functions operate normally.
      Result
      Proceed to
      OK
      NG

    OK

    END (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) WAS DEFECTIVE)

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)