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  1. #1
    New Member
    Join Date
    Jul 2018

    Default Question re: Controller Authorization

    re: the following for a 2018 Chevy Cruze

    "To obtain the seed file for your vehicle, follow the procedure below:

    1. Attempt to read the controller to obtain the unauthorized auth-code. Because the authorized auth-code is not yet known, reading will fail with the error message:

    Is step 1 supposed to occur by plugging the EFI live controller into the OBD port while in the car or is it supposed to occur within the software interface where the software attempts to query a file on the disk?
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  2. #2
    Lifetime Member
    Join Date
    Mar 2006


    Yes, you need to plug your FlashScan into the OBDII port, turn key to the "key on engine off", then attempt to read the controller using V8 Scan & Tune. It will import unauthorized auth code into the F3->F8 Authorization area.

    If you are using an AutoCal, you can also try reading the controller using your AutoCal, then synchronizing it with V8 S&T to import the unauthorized auth-code. If that doesnt work, you will need to contact your tuner.
    2013 Sonic RS Manual - 1.4L I4T E78, tuned, turbo mods, etc.
    2008 TrailBlazer SS 3SS AWD Summit White - LS2 E67/T42, bolt ons, suspension, etc.
    2002 Chevy TrailBlazer LT 4X4 Summit White - 4.2L I6 P10, lifted, wheels, etc.

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