PCM Hammer Release 014

They go by many names, P01, P59, VPW, '0411 etc . Circa 1999 to 2006. All VPW OBD2 PCMs.
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Re: PCM Hammer Release 014

Postby Gampy » Tue Aug 04, 2020 5:34 am

Typically error should break, timeout should continue.

However it is of my opinion that whole bit of code needs to be re-written utilizing Response<Message> proper if ReadDVIPacket(...) is properly returning a Response<Message>.
Any other code calling ReadDVIPacket(...) would need looking at as well ...

As for the Network message (line 342) Response<Message>, possibly, however at this point in time I do not know what else would be more appropriate then error strictly judging by the fact it was null previously.
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Re: PCM Hammer Release 014

Postby wilber1978 » Fri Aug 14, 2020 3:31 pm

P59 1mb ecu reflashed to 7603 os and custom bin
no issues with wright

[03:25:06:942] Calculating CRCs from file...
[03:25:06:973] Requesting CRCs from PCM...
[03:25:07:020] Range File CRC PCM CRC Verdict Purpose
[03:25:08:096] 0F0000-0FFFFF 8D0F8F91 8D0F8F91 Same OperatingSystem
[03:25:09:157] 0E0000-0EFFFF A50F3C90 A50F3C90 Same OperatingSystem
[03:25:10:218] 0D0000-0DFFFF A50F3C90 A50F3C90 Same OperatingSystem
[03:25:11:279] 0C0000-0CFFFF A50F3C90 A50F3C90 Same OperatingSystem
[03:25:12:340] 0B0000-0BFFFF A50F3C90 A50F3C90 Same OperatingSystem
[03:25:13:400] 0A0000-0AFFFF A50F3C90 A50F3C90 Same OperatingSystem
[03:25:14:461] 090000-09FFFF 7DA5C19F 7DA5C19F Same OperatingSystem
[03:25:15:522] 080000-08FFFF CDDEAE4C CDDEAE4C Same OperatingSystem
[03:25:16:583] 070000-07FFFF D006BDC7 D006BDC7 Same OperatingSystem
[03:25:17:644] 060000-06FFFF D2B04EC0 D2B04EC0 Same OperatingSystem
[03:25:18:704] 050000-05FFFF 36511E94 36511E94 Same OperatingSystem
[03:25:19:765] 040000-04FFFF F6B0E81A F6B0E81A Same OperatingSystem
[03:25:20:842] 030000-03FFFF A97E3395 A97E3395 Same OperatingSystem
[03:25:21:902] 020000-02FFFF EE1B7BAD EE1B7BAD Same OperatingSystem
[03:25:22:963] 010000-01FFFF A5700F21 A5700F21 Same Calibration
[03:25:23:525] 008000-00FFFF 300CD29D 300CD29D Same Calibration
[03:25:23:540] 006000-007FFF not needed not needed n/a Parameter
[03:25:23:556] 004000-005FFF not needed not needed n/a Parameter
[03:25:23:868] 000000-003FFF AE42598F AE42598F Same Boot
[03:25:23:884] All relevant ranges are identical.
[03:25:23:915] All write-request messages succeeded on the first try. You have an excellent connection to the PCM.
[03:25:23:930] We're not sure how much retrying is normal for a write operation on a 1024kb PCM.
[03:25:23:946] Please help by sharing your results in the PCM Hammer thread at pcmhacking.net.
[03:25:23:977] Clearing trouble codes.
[03:25:25:054] Elapsed time 00:05:29.3477785

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Re: PCM Hammer Release 014

Postby Gampy » Sat Aug 15, 2020 7:44 am


Thank you for posting your write success ...

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Re: PCM Hammer Release 014

Postby aaronc7 » Sat Aug 15, 2020 11:24 am

Hello, I have been doing a little testing with Gampy with my OBDLink MX, which apparently isn't really supported by this, but figured I would mess around with it a bit since I already have it.

What's really strange about all of this and what's kept me interested in testing it is.... My first time ever trying PCM Hammer v14 I was able to read a P01 and P59 with zero issues or errors. I was doing a PCM swap and figured I would get a bin backup of each. Both reads were done on a totally functional and complete car (2003 Corvette Z06).

Fast forward a few weeks I was trying to do a read again on the P59 and it's just tons of errors. I can't think of any logical reason why or how it went from totally working to totally worthless.

Tried a few test writes, maybe 4 or so now. 2 had no errors, 1 had 2 retries and this last attempt required 1 retry.

Read and write logs attached for anyone who might be interested.

edit: the read log is a proper debug log, but I accidently only saved the normal log for the write. but you get the idea.
(9.48 KiB) Downloaded 58 times
(133.98 KiB) Downloaded 56 times

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Re: PCM Hammer Release 014

Postby B52Bombardier1 » Sun Aug 16, 2020 4:23 am

It has to be problems with your wiring harness or too low of a voltage to your PCM. The MX+ device with PCM Hammer and LS Droid has worked perfectly for me.


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Re: PCM Hammer Release 014

Postby aaronc7 » Sun Aug 16, 2020 5:09 am

I don't think so, but who knows. Nothing has changed since it worked great those first 2 times. Also the pcm is licensed with Efi live and it has absolute zero issues. I read the MX has less memory than the MX+ and maybe LX too.

Open to any other ideas/thoughts or things I can try.

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Re: PCM Hammer Release 014

Postby B52Bombardier1 » Sun Aug 16, 2020 7:24 am

If you are doing this with the PCM installed in a vehicle, there will likely be other bus traffic to / from the Body Control Module that will interfere your reads and writes with the PCM. Absolutely everything I do here is with the PCM out of the vehicle and sitting on the kitchen table.


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Re: PCM Hammer Release 014

Postby NSFW » Sun Aug 16, 2020 1:31 pm

I'm inclined to blame other modules on the bus as well... But if you're having this trouble in the same vehicle that was having NO trouble earlier, then I dunno...

The single retry you got during the test write seems like no big deal. In the early days of XPro testing I had some successful writes with a couple dozen retries.

After the read attempt had that truncated packet, did you cancel the read yourself? I wonder what would happen if it was left to keep trying on its own.
Please don't PM me with technical questions - start a thread instead, and send me a link to it. That way I can answer in public, and help other people who have the same question. Thanks!

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Re: PCM Hammer Release 014

Postby aaronc7 » Sun Aug 16, 2020 1:37 pm

Yeah, I think the only reason I am interested in this is because I did 2x successful reads with zero errors before.

When I did the P59 read, I can't remember if that was before or after I did the VATS relink, maybe that is a factor regarding the other traffic messing it up.

But either way, that doesn't explain how I got a perfect read on my original P01 before I pulled it.

I'll keep messing around and let you all know if I/we figure out anything.

Maybe a longshot, but going to try downgrading my MX firmware and see what happens. Read some stuff about LS droid recommending older firmware. I don't think I've updated it since the successful reads, but it's worth trying I suppose.

I did cancel the read after it reached about 1%.....if you look at the time stamps its' super super slow. IIRC I let it run about 5 minutes and then cancel.

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Re: PCM Hammer Release 014

Postby crazy4chevs » Sun Aug 16, 2020 3:48 pm

Hi all im new here and just finished my first reflash on a 4896 pcm

Os changed to 12212156 2002 5.3l 4l60e 4x4 for a s10 blazer 4x4 swap

when it completed the flash it said to share the log here. hopefully this is the right section.


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