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-   -   Temp gauge re-code (https://xoutpost.com/bmw-sav-forums/x5-e53-forum/109501-temp-gauge-re-code.html)

80stech 12-20-2018 02:24 PM

Temp gauge re-code
 
So I was inspired by a "how to" BMWscanner 1.4 link that Overboost provided in a previous thread to try and recode my temp guage. Mucked around a bit last night and wasn't succesful (most of the info is for E46, E39 etc.) but sure looks do-able. I think I just need to use NCS expert dummy or try out the checksum fixer in BMWscanner. Has anyone done this on an E53?

Fifty150hs 12-20-2018 03:37 PM

Quote:

Originally Posted by 80stech (Post 1149735)
So I was inspired by a "how to" BMWscanner 1.4 link that Overboost provided in a previous thread to try and recode my temp guage. Mucked around a bit last night and wasn't succesful (most of the info is for E46, E39 etc.) but sure looks do-able. I think I just need to use NCS expert dummy or try out the checksum fixer in BMWscanner. Has anyone done this on an E53?

I think Crowz previously posted a how to.

wpoll 12-20-2018 03:40 PM

Quote:

Originally Posted by Fifty150hs (Post 1149737)
I think Crowz previously posted a how to.

He certainly did - and its a goodie.... :thumbup:

PA Soft 1.4 | Crowz Nest

Overboost 12-20-2018 03:40 PM

Quote:

Originally Posted by 80stech (Post 1149735)
So I was inspired by a "how to" BMWscanner 1.4 link that Overboost provided in a previous thread to try and recode my temp guage. Mucked around a bit last night and wasn't succesful (most of the info is for E46, E39 etc.) but sure looks do-able. I think I just need to use NCS expert dummy or try out the checksum fixer in BMWscanner. Has anyone done this on an E53?

How can I help? Did you get my how to? Grab some shots of your EEPROM and I'll see if we can find the code in there. Thinking it should be the same lines...

https://xoutpost.com/1121333-post23.html

80stech 12-20-2018 05:27 PM

When I try to write BMW scanner comes up with 5 errors and eeprom doesn't change. I'll try it again but from what I have read either a person has to change to exactly the right values so that checksum remains intact or recalculate the checksum, which supposedly is doable in BMW scanner? Looks like you guys didn't have the checksum issue?

80stech 12-20-2018 05:33 PM

As wrote that last post I just realized that maybe it has something to do with me loading and writing a saved file instead of making the changes directly in the editor live.

Overboost 12-20-2018 05:34 PM

Quote:

Originally Posted by Fifty150hs (Post 1149737)
I think Crowz previously posted a how to.


Quote:

Originally Posted by wpoll (Post 1149738)
He certainly did - and its a goodie.... :thumbup:

PA Soft 1.4 | Crowz Nest

Yeah, that's a good document. I wrote it :nanana:

Overboost 12-20-2018 05:35 PM

Quote:

Originally Posted by 80stech (Post 1149754)
As wrote that last post I just realized that maybe it has something to do with me loading and writing a saved file instead of making the changes directly in the editor live.

Yes, Ill PM you my number. I can guide you through it.

80stech 12-20-2018 05:49 PM

Thanks! :) I'll give it another try tonight and see how it goes. I would like to get the checksum thing figured out to feel like I understand a little more on whats going on. Did you guys do the speedo too?

Overboost 12-20-2018 06:04 PM

Quote:

Originally Posted by 80stech (Post 1149758)
Thanks! :) I'll give it another try tonight and see how it goes. I would like to get the checksum thing figured out to feel like I understand a little more on whats going on. Did you guys do the speedo too?

No, speedo and heated seat temperatures are fine as they are IMHO. No need for reprogramming the EEPROM there for me. The temp gauge is a must though. A 40 degree Celsius buffer (104F) is still a questionable BMW engineering design. Not sure WTF they were thinking... :dunno:

Just save your original .bin file for safe keeping and just make the changes live. Just click or cursor over to the appropriate hex value and change. Then just write to the EEPROM. No checksum validation needed.

The first hex byte of a line represents the number of data bytes to follow in that line and the last byte is a simple checksum. You aren't changing either of those.


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