OBDii LT1 pcms

[beerman]

Anyone have any info on 1996 LT1 PCM #16214399 and 1997 LT1 PCM #16242921?

[Keith@HPTuners]

Hmm...

4399 PCM
2 x HC11s
E side 28F512 Flash
T side 28F010
GM VPW j1850 Comms
10.4kbs Normal Mode
4X High Speed Mode 41.6Kbs

97
Little Change from 96
HC11 Mem Expansion "Page Option" implemented for T side Flash. 3 of the 4 Pages actually used.

That is some of the info I've gathered... I'm not an LT1 guru by any means.

Any specific info you looking for?

[RoboGeek]

they are OBDII even though they use the 68HC11 chips. GM changed them in 97(?)-98 to the newer TPU if I remember right..

So the programming will be different than the newer 332 type PCM but you can use the ASM11 assembler! ;D

What kind of info did you need?

[beerman]

I use the LT-1 OBD2 editor and ATAP V 2.03. I just bought a copy of HS-3000/99. I was actually wondering if there was a way to dump the the flash file and dump the NVRAM?

[RoboGeek]

Through the port you mean?

[beerman]

Yes, I wanted to dump the through the DLC. I was thinking I could use the B&B LDV commands on my ATAP to read the flash program. I wanted a raw version of the flash file so I could try and see what other information is not supported by my LT-1 OBDii Edit. As for trying to see the NVRAM I have no idea where to start.

[RoboGeek]

I have a prog that will dump the flash through the ALDL port (never tried it) but the OBDII I'm not sure if there is a tool for that yet. I know you can flash through the port but d/ling the flash contents I'm not real sure on.

I'm spending time right now in another area but if you look in this post near the end you'll see there is some real progress being made.