Well, not a near cousing... but we're there.
I own a Mazda RX8. Actually it's very hard to find information on this car ECU... mainly because it's not very popular, and due to the fact that who worked on it made it commercial and so it's keeping the "secrets".
Actually this car ECU is refleshable via OBDII, it uses a Renesas CPU, and the ECU should be very similar to a Mazda6 MPS unit.
My willing is to start to work on it, and i would like to procede by steps... the first one would be to identify the correct procedure to download the firmware, prior to start to think about the addresses and a way to hack into it.
I've found that probably the procedure would be very similar to the one applied to the Subaru's. I would be very glad to anyone that may point me out on where to start to look to (at least), so i may have a starting point.
This is how the stock ECU looks like:
And these are the identifiable chipsets:
D151815-8550 / SC 515611MFC185
64F7055F40
D151821-1280 (RAM?)
SPF00001 / SK3206 (Surface-mount Power Transistor Array?)
SE585
3E19 SE555 (timer?)
MC 331 (CPU?)
Any help? Thanks!