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The software provided flashes only with dealer credential. If you have dealer credential, you are probably not using this knock-off cable. Besides, as I have discussed at length previously, the Spyder generation of ECU cannot be reflashed - not by the dealer, not by anyone at Toyota, not by anyone on planet Earth. For a flashable ECU you have to wait until MY2003 ECU's that have J2534 compliance, that were never used on the ZZw30 platform - but they were used in Corollas and Matrix and other 1zz vehicles.

With that said it would not be impossible for someone to inject malicious code onto the chipset of these cables, and while it would not affect the Spyder ECU, it could affect other vechicle ECU's or the host system.
Oh I see, I noticed my cheaper techstream rep cable the cluster throws xmas tree of lights, but my expensive cable does not and has less errors in functions in general
 

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If you use techstream with a cheaper cable, lights like ABS seem to flash and there seem to be some errors for functions sometimes, whereas expensive cable doesn't, more expensive cable such as ecutek or tactrix
 
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