GM 16216588 - Hacking

American Delco GM ECUs and PCMs, ALDL, OBD 1.5.
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Re: GM 16216588 - Hacking

Postby yoda69 » Fri Nov 04, 2016 5:15 pm

I had problems with ostrich on VT 128k bin files, needed G6 adapter from Moates to work or I had to stack the bin 4 times to make it 512k and then it would work. I imagine this is to with bank swapping used in VT.
Try stacking the bin and see how you go, may be worth a try.

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Re: GM 16216588 - Hacking

Postby quadstar87 » Mon Nov 07, 2016 10:32 am

yoda69 wrote:I had problems with ostrich on VT 128k bin files, needed G6 adapter from Moates to work or I had to stack the bin 4 times to make it 512k and then it would work. I imagine this is to with bank swapping used in VT.
Try stacking the bin and see how you go, may be worth a try.


Thanks! I did that already but today was able to verify it's the adapter that's the issue. Need to debug some more and see if it's continuity or incorrect pin mapping that's giving me trouble.

I'll stack the bin on the 29F040 and read it back through my chip writer (with it in the plcc adapter) to see what's getting shifted around.

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Re: GM 16216588 - Hacking

Postby quadstar87 » Tue Nov 08, 2016 6:14 am

Well, the new adapter tests out fine.

It either needs a socket booster or i'm having issues with the plcc socket on my board. I'll post back up when I figure it out.

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Re: GM 16216588 - Hacking

Postby Xnke » Mon Mar 27, 2017 5:17 pm

You are aware that when you solder in the PLCC32 sockets, you *HAVE* to put the little plastic "floor" back in them, right? Otherwise they do not work.

The P66V6 PCMs use the same flash chips and sockets, but with no bank switching. I've got a pile of bricked ones and they are slowly being socketed and programmed with stock code.

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Re: GM 16216588 - Hacking

Postby quadstar87 » Thu Apr 06, 2017 10:42 am

Xnke wrote:You are aware that when you solder in the PLCC32 sockets, you *HAVE* to put the little plastic "floor" back in them, right? Otherwise they do not work.

The P66V6 PCMs use the same flash chips and sockets, but with no bank switching. I've got a pile of bricked ones and they are slowly being socketed and programmed with stock code.


Thanks for this tip! No, I didn't know that but i'll try it now that I do. I gave up on the emulation for awhile and focused on disassembly and program modification.

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Re: GM 16216588 - Hacking

Postby Xnke » Fri Apr 07, 2017 1:44 pm

The other big thing is that the conformal coating really makes it hard to re-use the factory installed chips-it's almost impossible to remove it all and it does not let the socket make good contact-even if you polish the pins, the goo left between the pins tends to hold the contacts apart.

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Re: GM 16216588 - Hacking

Postby quadstar87 » Wed Apr 19, 2017 3:39 am

Xnke wrote:The other big thing is that the conformal coating really makes it hard to re-use the factory installed chips-it's almost impossible to remove it all and it does not let the socket make good contact-even if you polish the pins, the goo left between the pins tends to hold the contacts apart.


YES that stuff sucks! Makes everything take 10x longer but keeps them nice in the harsh environment of a truck cab over 20+ years.

Thanks for the tips! I'm ordering a better re-work station to loop back to this soon and install some better sockets and a ribbon cable header onto the board.

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Re: GM 16216588 - Hacking

Postby quadstar87 » Sat Jun 10, 2017 10:29 am

I'm out from under my rock!

Gave up on the PLCC adapter and I'm wiring up direct to the edge connector while "un-swapping" the address lines to the Ostrich in order to do better real-time editing. Added the 2x20 header tonight and need to finish up a new 32 pin adapter cable.
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Re: GM 16216588 - Hacking

Postby antus » Sat Jun 10, 2017 10:56 am

Good idea! Much simpler approach and real time tuneable too.
Have you read the FAQ? For lots of information and links to significant threads see here: viewtopic.php?f=7&t=1396

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Re: GM 16216588 - Hacking

Postby SQ is the SQUAD » Thu Feb 20, 2020 10:03 am

how did the 2x20 connector end up working out?

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