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Ch341a 1.29 drivers5/23/2023 ![]() The easiest fix here is to change the boot select value on the flash chip to boot on ibc2 (the failsafe). So it’s bricked because it cannot boot anymore. This ibc1 partition is updated by the reinstall package. When you install the failsafe update package without the 2nd reinstall package, the flash chip boot select mode is set to boot on the ibc1 partition, which does not match the current Mazda system. It can either be the normal Mazda system, or the « failsafe» software. Basically what happens is that a small flash chip that contains the boot program has a flag on it that decides on which system it has to boot. The easiest way to do that is by shutting the CMU off after the failsafe package installation. ![]() The CMU update process is indeed very badly designed, as it has plenty of failure points where it ends with a bricked device that will not boot anymore. Thanks to this website: it saves me a lot of time to dig on how the system works. ![]() Luckily there is a way to recover, which is not so easy to do, bit it's quiet doable if you are not afraid to unmount the CMU, open it and plug some wires. I did the exact same thing as you where my car was turned off just after installing the failsafe package.
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