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Communities > Diagnostics > Asian Cars > Toyota ecu security key
Toyota ecu security key

305 Views 7 Replies Latest reply: 2023-12-27 14:10:23


  •   Level 6   
    (712) points
    Screechie
    2023-12-07 19:51:34
     good day I have a 2022 RHD Rav4 that I changed an engine ecu on but cant get it to start because of an issue with ecu security key has anyone experienced this issue before.

  •   Level 9   
    (3714) points

    2023-12-10 12:45:20 (Reply to:Screechie)

    Hi, you have to program the keys to the new ecu to get it started,see you tube for
    instruction video for programming keys,or visit a dealer .

  •   Level 1   
    (3) points

    2023-12-15 11:43:30 (Reply to:)

    Hello il having thé dame problem with a rav4 akl bought thé câbles but its say failed to
    read ecu name van you help please

  •   Level 6   
    (712) points
    Screechie
    2023-12-18 20:19:03 (Reply to:)
     I dont believe its a key issue the keys both lock and unlock the doors and the engine will turn over but there is a code b279986 which has a tech buletin to do  ecu security key write which is not referring to the ignition keys but rather a software key.

  •   Level 6   
    (712) points
    Screechie
    2023-12-18 20:24:02 (Reply to:)
     this is not same issue as mine you have an all keys lost problem I have two keys which are working as far as locking and unlocking doors and turn engine over.....what tools are you using to program keys and what year is your rav4

  •   Level 6   
    (712) points
    Screechie
    2023-12-18 20:31:45 (Reply to:Screechie)
     The car is built in Australia so Tis cant find vin as they only do lhd cars and toyota tech.eu is for europe cars and I live in Jamaica the option to use is unavaiable to me because in order to use the australian site one of the requirements is to live in australia

  •   Level 9   
    (3714) points

    2023-12-27 14:03:48 (Reply to:Screechie)

    Hi, this is a immobilizer problem, see Google what to do to fix a b2799 ,there's several
    instruction videos

  •   Level 9   
    (3714) points

    2023-12-27 14:10:23 (Reply to:Screechie)

    Hi,things to check,possible faulty transponder key ecu,wiring is open or shorted, a poor
    connection on ecu, faulty smart key ecu, faulty certification ecu. And even a faulty
    engine ecm.
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