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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 06:11 PM

I guess there needs to some dead band so that people don't see the gauge fluctuating as the DME changes running temp with heated thermostat. I assume 10 deg buffer is still enough though?

Overboost 12-20-2018 06:19 PM

2 Attachment(s)
Quote:

Originally Posted by 80stech (Post 1149760)
I guess there needs to some dead band so that people don't see the gauge fluctuating as the DME changes running temp with heated thermostat. I assume 10 deg buffer is still enough though?

My gauge sits straight up at 90C. If I jump on the throttle, the DME sends a signal to the heated thermostat and the temperature will drop as much as 10C. My gauge reflects that just as I would expect. It moves a little to the left. I now have a actual accurate gauge the way I want it. Plus, with my recommended hex code the red is now 115C and gives me more than enough time to shut it down if I have an overheating event long before the engine is hurt.

Overboost 12-20-2018 07:17 PM

Make sure to look for the code in both these lines of your Gauge EEPROM hex code 80stech:

0x0F0 rolling into 0x100
0x290 rolling into 0x02A0

And here are is the original hex code with the modified hex code underneath. Just change the ones in bold:

0F 65 32 D0 4B D0 73 38 78 69 7D FF
0F 65 3C D0 55 D0 5F 38 6E 69 73 FF

80stech 12-20-2018 09:47 PM

K, got it! :) I needed to use the binoculars! Cheers :beerchug:

I guess no checksum needed with redundant code. Good learning experience though for down the road.

Overboost 12-20-2018 10:53 PM

:thumbup:

mr_robot 12-20-2018 10:56 PM

This is for 3.0 and 4.4 only correct?


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Overboost 12-20-2018 10:59 PM

Quote:

Originally Posted by mr_robot (Post 1149771)
This is for 3.0 and 4.4 only correct?


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I would think the gauge is the gauge. I have not done it personally on anything other than the M54 but if you can get us some screenshots of your gauge EEPROM, we can have a look. :dunno:

80stech 12-21-2018 12:16 AM

So with your numbers the red lite comes on at 115 not 110 right?

andrewwynn 12-21-2018 12:19 AM

I want to do this fix asap! The moronic non gauge is one of the worst things ever. I drove my car months never getting to closed loop because the needle pointed to noon and the temp was 74c!


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Overboost 12-21-2018 12:27 AM

Quote:

Originally Posted by 80stech (Post 1149778)
So with your numbers the red lite comes on at 115 not 110 right?

I think the red light comes on at a value from the DME (that has not been modified) but it is too late at that point. My drop dead red marker on the gauge comes on at 115C instead of 125C. (50 degrees F)


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