armchair theory on ecu reflashing

[CTScott]

Originally Posted by Nexus1155

Mmmmm I don't care to get into a big discussion at the moment. I always beleive that Benchflashing is the way to go all the time if it is a possibility.

NEC makes a flasher PG-FP5 that is said to flash all NEC chips proprietary or not. This is probably as low of a communication you are going to get unless you decide to take the MCU off of the board itself, but that in itself is a waste if you do not have an adapter to put it into a programmer.

Regardless, me and CTScott conversed on this topic. There is a pinout on the board where the PG-FP5 was originally used to program the chip and it was not sealed off. Alot of companies disable communication through this means by shorting out a circuit after it has been programmed, but only someone who has the device will be able to find that out in the long run. And yes, the PG-FP5 does program .S files as the one CTScott has.

There are many whatif's could'bes and howcome's flashing this ECU brings about, but it will happen once someone who has the time and money can get to it. I would dive more into it, but I don't have $600 to blow on an NEC only device to just "test" if it works. It is a risk and I might do it if I come into some cash to have another toy, but not this moment when I have to pay rent every month for the garage :(

I have been trying to track someone down who owns a PG-FP5. I don't want to drop the coin for one until I know whether or not Toyota had read protected the NEC microcontroller.