PCM Programming - PCM Now Dead!! HELP!!
Thread Starter
Melting Slicks
Joined: Apr 2003
Posts: 2,150
Likes: 6
From: NS
PCM Programming - PCM Now Dead!! HELP!!
Ok, now I have a big problem.
Using TunerCAT I downloaded my Flash and made a small change to the cooling fan temps and tried to write it back to the PCM. It established communications, then erased the PCM Flash, then I got an error message. "Invalid message Format" or something similar. I clicked Ok and it said retry was successful. It proceeded to approximately 50% then I received another "Invalid message" error. This time it aborted with no other message. Then my cooling fans turned on and I knew the PCM was dead. I tried to send the Flash image again and Tuner can't establish communications!!
This is not good. What options do I have now? I have my Flash memory on my laptop, how can I load it?
:cry :cry :cry
Using TunerCAT I downloaded my Flash and made a small change to the cooling fan temps and tried to write it back to the PCM. It established communications, then erased the PCM Flash, then I got an error message. "Invalid message Format" or something similar. I clicked Ok and it said retry was successful. It proceeded to approximately 50% then I received another "Invalid message" error. This time it aborted with no other message. Then my cooling fans turned on and I knew the PCM was dead. I tried to send the Flash image again and Tuner can't establish communications!!
This is not good. What options do I have now? I have my Flash memory on my laptop, how can I load it?
:cry :cry :cry
Safety Car
Joined: May 2003
Posts: 4,961
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From: Vette-hid.com Lost in DFW texas
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St. Jude Donor '06-'07
Re: PCM Programming - PCM Now Dead!! HELP!! (Atok)
what year is your car .
Check you cables you used to plug into your pcm.If you try to load and the cable disloges it can blow you corvettes computer.Zack from speed scene wiring.com might be able to talk you thru it and give you a hand.Zack is out this week but grew is there hemight be able to help. www.speedscenewiring.com
Check you cables you used to plug into your pcm.If you try to load and the cable disloges it can blow you corvettes computer.Zack from speed scene wiring.com might be able to talk you thru it and give you a hand.Zack is out this week but grew is there hemight be able to help. www.speedscenewiring.com
Melting Slicks
Joined: Aug 1999
Posts: 2,240
Likes: 42
From: Baltimore, MD USA
Re: PCM Programming - PCM Now Dead!! HELP!! (Atok)
I see you're not in the US but a person named Andrew at http://www.akmcables.com unsolders the flash memory chip and installs a new flash memory chip with the factory program and also installs a socket so that if it every happens again, you can replace the chip with a backup one.
As you found out, if you can't link with the PCM because the program is corrupt. The only way to get the PCM working is installing a new flash memory chip that is already programmed.
[Modified by Hooked on Vettes, 9:23 PM 7/16/2003]
As you found out, if you can't link with the PCM because the program is corrupt. The only way to get the PCM working is installing a new flash memory chip that is already programmed.
[Modified by Hooked on Vettes, 9:23 PM 7/16/2003]
Thread Starter
Melting Slicks
Joined: Apr 2003
Posts: 2,150
Likes: 6
From: NS
Re: PCM Programming - PCM Now Dead!! HELP!! (Lone Ranger)
I sold my HPP+ and was thinking about getting tunercat. Hmm... now having 2nd thoughts :eek: Did you use an AKM cable or was it another type?
The read/scan functions work just fine. Something caused TunerCAT to abort abruptly after 50% of the write function. I really like this Tuner program but to be honest I won't be using it to write my PCM anymore. I would love to know what when wrong. The PC was a P3-1.2Gig Dell Laptop running WinXP Pro. I did notice the FIFO buffers on the COM port were set to the lowest setting, which shouldn't matter for 8192 baud on this PC.
I'm now in the process of unsoldering my Flash chips and soldering sockets to the boards. I'm going to use my EPROM/Flash writer to modify my PCM from now on but I need to pick up a couple of chips first.
Man, what a PITA!!!!!
:sad:
Drifting
Joined: Jul 2001
Posts: 1,296
Likes: 0
From: Largo Florida
Re: PCM Programming - PCM Now Dead!! HELP!! (Hooked on Vettes)
I see you're not in the US but a person named Andrew at http://www.akmcables.com unsolders the flash memory chip and installs a new flash memory chip with the factory program and also installs a socket so that if it every happens again, you can replace the chip with a backup one.
As you found out, if you can't link with the PCM because the program is corrupt. The only way to get the PCM working is installing a new flash memory chip that is already programmed.
[Modified by Hooked on Vettes, 9:23 PM 7/16/2003]
As you found out, if you can't link with the PCM because the program is corrupt. The only way to get the PCM working is installing a new flash memory chip that is already programmed.
[Modified by Hooked on Vettes, 9:23 PM 7/16/2003]
Le Mans Master
Joined: Feb 2002
Posts: 7,858
Likes: 2
Re: PCM Programming - PCM Now Dead!! HELP!! (Atok)
What version of tunercat were you using? According to their web site everyone with 94 or 95's need to upgrade to the latest version asap due to problem with the older version screwing up ECM's.
Thread Starter
Melting Slicks
Joined: Apr 2003
Posts: 2,150
Likes: 6
From: NS
Re: PCM Programming - PCM Now Dead!! HELP!! (Lone Ranger)
What version of tunercat were you using? According to their web site everyone with 94 or 95's need to upgrade to the latest version asap due to problem with the older version screwing up ECM's.
I've got the chips off the PCM board now, waiting for new chips/sockets from Ion. He's been a big help, many thanks to him. I need to get a PLCC adapter for my EPROM/Flash writer so I can write my own.
No longer :cry , just :sad: now.
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