#31: Re: Maximum 50 code-clears for ECU Author: kernel, Location: EarthPosted: Tue Nov 27, 2012 2:19 pm ----
V9977 wrote:
I believe it's to do with the fact that EEPROMs will only work reliably for a given number of write opperations before they risk being corrupt during the process.
I just read on Wiki that EEPROM can be used for a lot lot read/write cyles (up to 1 million I read)
#32: Re: Maximum 50 code-clears for ECU Author: V9977, Location: Athens, GreecePosted: Tue Nov 27, 2012 2:36 pm ----
kernel wrote:
V9977 wrote:
I believe it's to do with the fact that EEPROMs will only work reliably for a given number of write opperations before they risk being corrupt during the process.
I just read on Wiki that EEPROM can be used for a lot lot read/write cyles (up to 1 million I read)
Nope.
Depends on age and design of the component.
They have been around for ages and ages, the earlier ones could do 10 to 50 cycles with
special conditions in place.
Modern ones can do millions read/write but even then, 'wear-evening' is employed by the systems using it.
#33: Re: Maximum 50 code-clears for ECU Author: Addaz, Location: SuffolkPosted: Tue Nov 27, 2012 2:52 pm ----
V9977 wrote:
Addaz wrote:
Have a bit of info on this
Its a bit of b******s tbh, the 50 is right for PP2000 in some aspects. For when you clear a fault code(s), or 'session' in other terms, it is stored on the PC for others to view (eg warrenty department) and for when the 50 boundry is full it just wont record the sessions anymore in the ECU, i dont know if they can be cleared, but frankly i dont ideally care
But even if the 50 is reached you can still continue to clear fault codes time and time again, there is no limit.
Side note, did you know after fourty driving sessions (car temperature rises above 22C) the fault codes will try to clear themselves.
As you do
Wait.
Sessions is different entirely and IS stored on the PC and company account.
History is stored in the ECU itself and I have indeed come accross Peugeot and Citroen ECU that will NOT allow wiping of codes due to it being full. You just get "History is full" message and that's it.
I believe it's to do with the fact that EEPROMs will only work reliably for a given number of write opperations before they risk being corrupt during the process.
Also, what about reseting the auto-adaptation?
Just disconnect battery or...?
I called it a session just to make it easier to understand, but you are correct a session is stored on the PC for the tech or whoever to send it off or re-track back into it
I will have to confirm on how but as said by my mentor (master tech) you can clear for ever and a day. If he doesnt know im off to PSA england HQ and i will pose the question to them
#34: Re: Maximum 50 code-clears for ECU Author: V9977, Location: Athens, GreecePosted: Wed Nov 28, 2012 6:49 am ---- Could you please ask him/them about reseting the auto-adaptation of the engine ECU?
Just dis-connect battery or do it with PP2000 command?
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