ok, I was finally able to get my pcm working again. Not sure if positional or the chip but the last iteration flashed both sides without a single error so I'm going to leave it alone as long as I can.Originally Posted by steveo
ok, I was finally able to get my pcm working again. Not sure if positional or the chip but the last iteration flashed both sides without a single error so I'm going to leave it alone as long as I can.
Steveo I was watching a video on youtube about building a 16bit ecu and saw them using an arduino to record the address and data sent to in and out of the ecu. Because we have access to the memory chip is this the info you need for the bin splitter?
The arduino I have only has enough ports to give you address only but knowing the order they write should allow us to match to the locations used. I'll see what I can do this weekend to replicate what I saw.
i feel your pain. i think my socketed ECM behaved best with two folded business card chunks under the chip. it's some real voodoo getting that thing right.
honestly i think someone just needs to bust out an ohmmeter and trace the address lines back to the ECM's processor. we have data sheets for the processor pins and eeprom laying around. descrambling it iteratively proved really annoying but i could try that way again too...
I'm off this weekend, I'll see if I can get a record of the order each address is accessed during a write and we can match it to the order transmitted to the ecm.
that’d be cool. i have a new ecm in the mail so if that fails i’ll do a hard trace of the address lines to the ecm and see whats going on there. the possible permutations for arranging 16 address lines is totally insane. it’s basically encrypted.
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