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

wpoll 01-09-2019 04:51 PM
Quote:
Originally Posted by Crowz (Post 1151606)
Just set it to 85C or so and when the motor warms up to normal the light should come on. If it does then set it back to 110C your wanting for the final setting.
I thought about doing that Crowz, but I'm worried by the level of interaction between the IKE and the DME/DDE and thought it might put the engine into fail-safe or something stupid! :confused:

I guess screwing with the sensor might do the same thing but the wiring diagram clearly shows independent sensors for the DME/DDE and IKE functions. But wiring is one thing, data buses are another! ;)

https://www.newtis.info/tisv2/a/en/e...sensor/vuxEDIp

Overboost 01-09-2019 04:53 PM
Quote:
Originally Posted by wpoll (Post 1151604)
Hmm... so that info. requires a re-think of how the alerts etc. work... ;)

Still trying to track down my spare sensor so I can test my new 110c setting. I guess a chunk of cardboard down the grill might do it too.. :yikes:
This may be the easiest way to test it.

wpoll 01-09-2019 04:55 PM
Quote:
Originally Posted by Overboost (Post 1151609)
Yes, with this new info I am wondering if the 115C alarm I set will actually work if the message is limited to the CAN message from the DME.
So the second sensor wired to the IKE drives the gauge but the warning comes from the DME/DDE via CAN bus... so to test this we need to futz with the engine temp sensor and not the gauge temp sensor, to convince the DME/DDE that the engine is overheating... sounds a bit dodgy.. :cool:

Overboost 01-09-2019 04:58 PM
Quote:
Originally Posted by wpoll (Post 1151612)
So the second sensor wired to the IKE drives the gauge but the warning comes from the DME/DDE via CAN bus... so to test this we need to futz with the engine temp sensor and not the gauge temp sensor, to convince the DME/DDE that the engine is overheating... sounds a bit dodgy.. :cool:
Well to prove our alarm settings in the LCM are indeed working, we need to verify the temp at 110C in your case and see if it alerts.

wpoll 01-09-2019 05:04 PM
Quote:
Originally Posted by Overboost (Post 1151613)
Well to prove our alarm settings in the LCM are indeed working, we need to verify the temp at 110C in your case and see if it alerts.
Might try the suggested methods combined - drop the alarm temp setting to 100c then go for a drive with the radiator blocked by cardboard - 100c shouldn't stress my diesel cooling system overly and at least we'll then know!

Although I 'spose that not really any different than dong what Crowz suggests - setting the alarm at 85c. :dunno:

I'm back at work now, after our summer break, so have less daylight hours to play with this.. But at least its warm here! :rolleyes:

P.S. - I'm NOT actually going to stick cardboard in front of the radiator - there's too many other things up there that need air flow, like the intercooler, oil cooler etc. ;)

80stech 01-09-2019 10:18 PM
Quote:
Originally Posted by wpoll (Post 1151612)
So the second sensor wired to the IKE drives the gauge but the warning comes from the DME/DDE via CAN bus... so to test this we need to futz with the engine temp sensor and not the gauge temp sensor, to convince the DME/DDE that the engine is overheating... sounds a bit dodgy.. :cool:
From what I get out of reading that factory info and poking around is that the gauge side of the sensor doesn't get used for anything. I did a ton of futzing on the DME side with no dodgyness happening other than setting a code for it being shorted.

wpoll 01-10-2019 12:26 AM
Quote:
Originally Posted by 80stech (Post 1151637)
...

I did a ton of futzing on the DME side with no dodgyness happening other than setting a code for it being shorted.
Good to know - thanks for blazing the trail. :thumbup:

Overboost 01-10-2019 10:29 AM
Quote:
Originally Posted by wpoll (Post 1151614)
Might try the suggested methods combined - drop the alarm temp setting to 100c then go for a drive with the radiator blocked by cardboard - 100c shouldn't stress my diesel cooling system overly and at least we'll then know!

Although I 'spose that not really any different than dong what Crowz suggests - setting the alarm at 85c. :dunno:

I'm back at work now, after our summer break, so have less daylight hours to play with this.. But at least its warm here! :rolleyes:

P.S. - I'm NOT actually going to stick cardboard in front of the radiator - there's too many other things up there that need air flow, like the intercooler, oil cooler etc. ;)
Right, I didn't think about the oil cooler and intercooler... :dunno:

Clockwork 11-29-2019 12:19 PM
has anyone used NCS Expert to recode the temp gauge to more realistic values?

80stech 11-29-2019 01:10 PM
What do you mean by realistic values? The amount of buffer for the gauge staying in the center?


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