USB BDM NT

They go by many names, P01, P59, VPW, '0411 etc . Circa 1999 to 2006. All VPW OBD2 PCMs.
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Re: USB BDM NT

Postby bubba2533 » Tue Feb 12, 2019 1:23 pm

Edit: I had my wiring wrong, so ignore this.

I attempted to flash a bin file with a different OS than the one that came on my PCM to do some investigation. I've done this successfully in HPTuners, so I thought it was no big deal.

Long story short I discovered that the BDM is not flashing a large section of the bin (0x0000-0x3FFF) which I confirmed by flashing a bitwise NOT of the stock file and reading it back out.
Last edited by bubba2533 on Tue Feb 12, 2019 2:42 pm, edited 1 time in total.

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Re: USB BDM NT

Postby antus » Tue Feb 12, 2019 1:50 pm

It sounds like it didnt disable boot block protection and just ran with the regular flash process which worked for all but the boot block.
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: USB BDM NT

Postby bubba2533 » Tue Feb 12, 2019 2:19 pm

Yep, checking my wiring as I type. Thought I confirmed all of it before even moving on, but guess I missed something.

EDIT: And I wired it wrong. At least I know what the problem is now.

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Re: USB BDM NT

Postby bubba2533 » Thu Feb 14, 2019 12:26 pm

Well, I fried one. Tried to rush and fix my mistake Monday night into Tuesday morning (stayed up way to late). I read the datasheet wrong so I had the +12v on the wrong pin and heard a pop when I powered up my power supply. Good think these PCM's are cheap.

I carefully read through the datasheet this time and I found that I had the Vpp pin wired to +12v through a resistor (which is correct), but I didn't have RP# also wired to +12v so it wouldn't let me write to the boot block.

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Re: USB BDM NT

Postby DavidBraley » Thu Feb 14, 2019 1:39 pm

bubba2533 wrote:Well, I fried one. Tried to rush and fix my mistake Monday night into Tuesday morning (stayed up way to late). I read the datasheet wrong so I had the +12v on the wrong pin and heard a pop when I powered up my power supply. Good think these PCM's are cheap.

I carefully read through the datasheet this time and I found that I had the Vpp pin wired to +12v through a resistor (which is correct), but I didn't have RP# also wired to +12v so it wouldn't let me write to the boot block.


Oh man that sucks. Good to know you figured it out. I hope the USB BDM NT device is OK too. If you know it's the flash chip that's been hurt, I've been reading that it's possible to carefully de-solder the old one and solder a new one in it's place. Nothing to loose at this point in giving it a try.

I've got a question for you: I've tried to get help on the USBJTAG forum for help with a xml config file for the P59's that use the AMD flash with no luck. Do you have luck contacting the site administrator directly? I don't want to be a pest...
-David

Horsepower determines the speed you hit the wall. Torque determines the size of the hole you make.

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Re: USB BDM NT

Postby bubba2533 » Thu Feb 14, 2019 2:04 pm

I thought about soldering a replacement onto it, but I just don't know where to buy a replacement. At least a replacement that is a know compatible one. And I'm not sure what I fried, so it might not be worth the trouble.

I have been better if you message him directly. The past couple times I chatted with him on his website through a chat interface. He even used remote desktop into my computer to help me debug it.

Go here and look for the chat on the bottom right. https://www.usbjtag.com/zenshop/

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Re: USB BDM NT

Postby DavidBraley » Thu Feb 14, 2019 2:41 pm

Bubba2533,

Thank You! I will do that.
-David

Horsepower determines the speed you hit the wall. Torque determines the size of the hole you make.

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