Toyota Highlander 2003 3.0L 1MZ-FE Virgin ECU

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  • tyrranyecu
    Newbie
    • Feb 2025
    • 1

    #1

    Toyota Highlander 2003 3.0L 1MZ-FE Virgin ECU

    Hello,

    I just bought a Highlander 2003 3.0L 1MZ-FE and I'm seeking a virgin ECU file for it to re-train the keys.
    Currently has 4 keys registered, I only have 2 which don't work, active immobilizer.
    Current ECU shows the following codes:

    p0748 p0778 p2716 p0513

    I'm hoping the ECU is the root cause and I ordered a used ECU on ebay. The seller said several mechanics checked it and confirmed a bad ECM. I should know when I hook up the used ECU even before the keys get entered I can read the codes.

    Could you please share any info on ECU reading / Key reading or resets for 2003 Highlander 3.0l and any virgin files for the ECU I could use?

    Thank you,
    Brandon
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