AgentOrange

What happens when you try and read or write to a locked PCM with HPTuners??? Mine is lockes by Ed Wright and just wondering if it just give you an error or will crash the PCM. Oh details would be nice if you have them.

Magnus

iTrader: (4)

It won't even allow you to get that far. If the PCM is "locked", other software programs including ours and GM's will not be granted access to the PCM's data for read or write.

You won't damage the PCM by trying to read or write it if it is locked.

- Keith, HP Tuners

AgentOrange

But how does a dealer re-flash the pcm then?

Magnus

iTrader: (4)

If its locked, they can't.

AgentOrange

I was under the impression by Mr. Wright that a locked PCM has to be re-flashed by him or taken to the dealer and reloaded with the OEM software.

Magnus

iTrader: (4)

well if that is the case, then our pro package can rewrite the entire PCM with a valid unlocked file.

gameover

it all depends on how it is "locked". There is locked and then there is *locked*. If a dealer can reflash it then it is not *locked* and there is a very good chance our s/w will read/write it.

Slowhawk

iTrader: (12)

Most locked files can be rewriten with a valid file.I know Cartek and SLP files can be rewriten,don't know about Ed's though.

AgentOrange

OK little update, well HPTs software was able to read the tune fine and under status it states its unlocked. So I assume it will write it fine if it was able to read it, right? I guess Ed even didn't lock it or the software just goes about doing things a little different.

Brains

iTrader: (7)

There is locked, and there is scrambled.. Make sure what you're changing is really doing what you want It'd be best to flash a KNOWN *COMPLETE* bin back to the PCM to start with - ie. dealer flash or other package that writes the OS *and* calibration.

gameover

extremely very good advice, although i would hope no-one out there is changing the OS and then leaving the ID's the same.

Normal dealer flash doesn't write the OS on a 99+

slick98ta

Mine was locked by Ed Wright and HP Tuner reads and writes to mine just fine. I've wrote to mine about 5 times or so with no problems.

foff667

iTrader: (2)

what do you mean? Ive got a locked cartek tune in my car now & just purchased hp tuners do i have to bring it back to them to unlock it? From what i got from that sentence i wouldnt, but from listening to others i dont wanna screw with stuff & have issues because i messed with the wrong value er whatever.

Thanks
Bill

AgentOrange

Well a little update....I have read and wrote to the PCM a number of occasions with no isse. All values read in look fine, so no scrambling. Thank god because it saved me a ton of time and work. My tune was for SLPs 218/222 and now I have a 224/228. After I made some offsets for injectors and stuff she runs great and will need very little to tune it for the new cam.

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