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Ok uploaded the corvette OS and Bin and now I have a no start situation. not even turning over no click no nothing. Lights on dash come on but that's it. Yes i verified the antitheft was turned off. I think so anyway.
Did you notice the last few messages from when you flashed the OS? I suspect that there was something in there about running into trouble during the flash.
Did not work. Tried back up PCM and got same result. What else could have happened to cause this to happen? PCM Hammer says all the sections are ok just can't get the OS and fails out at that point every time even after grounding that spot on the board right before it tries to communicate. Really bummed out I was right there, SMOG lined up and just needed to get the registration fees together and now this....
When you say "did not work" what exactly did you try?
When you say "tried backup PCM" what exactly did you try?
Are you flashing with a bench wiring harness, or in the car?
I am happy to help, but I can't read your mind.
Some PCMs have Intel memory chips, which draw a lot of power at the start of each write, and will sometimes cause cheap power supplies to brown out, which interrupts the flash proces and leaves the PCM with one section of memory wiped - but that is recoverable with the pin-grounding trick.
When you say "did not work" what exactly did you try?
When you say "tried backup PCM" what exactly did you try?
Are you flashing with a bench wiring harness, or in the car?
I am happy to help, but I can't read your mind.
Some PCMs have Intel memory chips, which draw a lot of power at the start of each write, and will sometimes cause cheap power supplies to brown out, which interrupts the flash proces and leaves the PCM with one section of memory wiped - but that is recoverable with the pin-grounding trick.
so i tried the pin grounding trick in vehicle several times and kept failing out at the request for OS point in the write OS program. So I grabbed a second PCM that I have in garage and s2apped it in and got the exact same result so i pulled the cover tried the grounding pin trick and got the same result of it failing at the request for OS part of program. I now have the original PCM in garage and am going to put it on the bench harness soon as my power supply(big car batterey) finishes getting a fresh charge and see if it makes any difference.
Should have said this before but I tried the corvette bin and had a dead key no start no click no fuel pump so I tried a different bin and it would kick everything on and tirn over but not catch. So i swapped some segments between the two to get to manual trans and at least turning over flashed it and then this happened. So I have no doubt I screwed something up but I was just trying to do everything I have been told to do in the past. Changed the OS then combined matching OS bins to make a 5.3 manual bin to start the tune process o er again from scratch.
About that 2nd pcm... which of these:
a) the 2nd pcm used to work, but now the car won't start with it, and you never flashed it since the last time it worked
b) the 2nd pcm used to work, then you flashed it, now the car won't start
Also, after flashing, you should always see a series of checks where it compares blocks of memory in the PCM with the corresponding sections of the .bin file. I'm very curious as to whether those showed that all sections matched. If they didn't match, then the data on the flash chip is corrupted (because something interrupted the write) and that's where the pin-grounding trick helps.
But if the checks did match, then there are two possibilities:
a) the file itself was corrupted
b) something else is preventing a healthy PCM from talking to PCM Hammer.
About that 2nd pcm... which of these:
a) the 2nd pcm used to work, but now the car won't start with it, and you never flashed it since the last time it worked
b) the 2nd pcm used to work, then you flashed it, now the car won't start
Also, after flashing, you should always see a series of checks where it compares blocks of memory in the PCM with the corresponding sections of the .bin file. I'm very curious as to whether those showed that all sections matched. If they didn't match, then the data on the flash chip is corrupted (because something interrupted the write) and that's where the pin-grounding trick helps.
But if the checks did match, then there are two possibilities:
a) the file itself was corrupted
b) something else is preventing a healthy PCM from talking to PCM Hammer.
Honestly it has been a long time and a lot of chemo and immunotherapy since I did anything with PCM #2 That I really can't remember what the state or condition it is in. There is a high likelyhood that it is bricked also now that you mention it but I just don't know. I did not notice the checks of comparing memory blocks so that also is a I don't know. Sounds like the only option I have is to figure out how to make the grounding pin trick work. About half the time when i did try it I got a click out of something in the fuse box or under dash area not sure what it was. Is that a good sign or a bad sign? When PCM Hammer is counting down it's 10 second timer before attempting to connect where do i want to be making that ground connection? 1 second, 3 seconds before or right after it starts or just hold it on there until it connects?
Sorry to hear about the chemo and all. I hope it works out well for you.
I have only done the pin-grounding thing with a bench harness, so I don't know what to expect when doing it in the vehicle.
And I haven't done it for a couple years, so I don't remember the specifics around timing. There are some youtube videos about it, they will probably have more info. I think used Pete Sonntag's video as a reference when I did mine, he's Loud160 (or something like that) on YouTube.
Sorry to hear about the chemo and all. I hope it works out well for you.
I have only done the pin-grounding thing with a bench harness, so I don't know what to expect when doing it in the vehicle.
And I haven't done it for a couple years, so I don't remember the specifics around timing. There are some youtube videos about it, they will probably have more info. I think used Pete Sonntag's video as a reference when I did mine, he's Loud160 (or something like that) on YouTube.
Yeah it worked out with surgery I beat it so far so good but there has ben lasting effects from treatment for sure. I'm not complaining don't get e wrong it beats the alternative fir sure. I watched Pete's video also and followed it as close as i could and still getting the same error. The back up was giving me a error saying OS doesn't match but when i go to write something to it I get the same BS and now it won't even read the OS.
I just flashed that file to a PCM on my workbench and it booted normally and I had no trouble flashing it a second time, so I feel pretty confident that the file is valid. It would be interesting to compare the file that you just read with the LM7 file (or whatever file you flashed) just to be sure. If you're handy with the command line, you can run "fc /b file1.bin file2.bin" to compare them.
I'd try to move forward on two fronts:
1) For the PCM that has 12587603 on it now, try to get the truck to start and run with it. This one should NOT need the pin-grounding trick. I think it's safe to assume that this PCM is healthy, though it might need tuning in order to run your engine properly. If PCM Hammer can't talk to it, then that's probably a wiring problem, either power, ground, or the communication line.
2) For the other PCM, try to flash your last-known-good tune with the previous OS. Getting that one into a known-good state means that you don't have to worry if anything goes wrong with the other one.
It'll be interesting to see if PCM Hammer can communicate with either of them using a workbench wiring harness. If it can't communicate with the first PCM, that probably indicates a problem with the wiring. If it can communicate with the first one, but not the second one, then the second one needs the pin-grounding trick. But it's also possible that you'll find that they both act normally on the workbench and the real issue is wiring in the vehicle.
One more thing - I get that "permission to upload the kernel was denied" error every once in a while, both on my desk and in my car.
Power off, power on, wait for the 10-second timer... it almost always works after that.
It's pretty random and I still don't understand what causes it or how to avoid it.
But in the second screenshot, where it tries to ask the PCM for the operating system ID and doesn't get a response... that usually means that the wiring is bad or the PCM is bricked. Since the PCM worked fine right before that, I'm guessing it's a wiring problem.
I'm gonna run thru wiring and check them both on the bench and see whats up I can find out that way. Not much choice since it is the only 2 I have and both have vats enabeled or just bricked so bad fuel pump doesnt come on. So getting one running isnt an option at this point untill I sort out whats wrong with them.
any wiring problem I should be looking at first? all my connections seem to be there no wires pulled out of connectors or twisted weird looms or anything to cause alarm visually.
that is what I just got on the bench.
The PCM just needs power to 2 pins, ground to 1 pin, and 1 communication line... double and triple check. And check the voltage. The fact that one PCM gave you a successful read makes me that that one is probably healthy, so if you can't talk to it with a bench harness, I'd be inclined to think that the harness is the problem.
It would be interesting to see what messages are sent from the PCM when power is applied. Or how many messages. When a healthy PCM gets power it spews a ton for messages for a few seconds, then it sends a message every couple seconds.
If I remember right, when a PCM with a single corrupted flash block boots up it will send a much smaller number of messages, followed by a message every half-second or so.
Does the OBDX have a light that blinks when there's a message coming from the PCM? That might be interesting to watch.
The PCM just needs power to 2 pins, ground to 1 pin, and 1 communication line... double and triple check. And check the voltage. The fact that one PCM gave you a successful read makes me that that one is probably healthy, so if you can't talk to it with a bench harness, I'd be inclined to think that the harness is the problem.
It would be interesting to see what messages are sent from the PCM when power is applied. Or how many messages. When a healthy PCM gets power it spews a ton for messages for a few seconds, then it sends a message every couple seconds.
If I remember right, when a PCM with a single corrupted flash block boots up it will send a much smaller number of messages, followed by a message every half-second or so.
Does the OBDX have a light that blinks when there's a message coming from the PCM? That might be interesting to watch.
It does a blue light that indicates information from the pcm I think and another in green labeled obd and a red power light. Get blue flashing half second or so on 0l7g in when i start pcm hammer it goes to green flashing faster and the red os on the whole time no matter which way i am plugged in. Here is the real kick in the nuts, I can get a read off either pcm in the truck but cant write anything. Full read it makes me enter in the OS but then it does take a full read. Then I try and write right away and it fails same as before. Tried pulling fuses and then restarting waiting past ten seconds no luck. Pulled fuses put them back did the groundimg pin trick many times and didn't change anything. So beyond frustrated with this bitch right now....
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