Daytona Multifunction Display on k1100rs

[t.penev89]

Hi Guys, after few terrible unsuccessful tryouts I decided to buy a Daytona Multifunction Display, and its amazing!!

Everything is very easy and reliable, Everything works for me except the water temperature... has anyone also has this problem, it's giving me very High temp when I connect to the black wire which is for the water temp gauge.
The fuel started and gives the correct information but the temp is wrong.

Any ideas, some resistor or anything else can trick the job or no...?

Giving you some photo's :)
Cheers 🍻


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[johnny]

greetings...

poast up some moar pictures of that taint grinder...

j o

[rbm]

Your Daytona gauge is expecting the temp sensor to have a range of 100K Ohms the BMW one you have connected to only has a range of about 2500 Ohms.  You'll have to research and find a temp sensor that is correctly speced.

[t.penev89]

Probably, there are sensors which are shown in the installation manual of the speedo but they are only written as part number, no more detailed.
I saw on cafe4racer and cafetacerwebshop sensors for DAYTONA but not specifically for k1100 or for this multifunction speedometer.
They seems to have the same connector so I can order one and see if it fits, probably different fitting but thats not so big problem...
My point is If I change the sensor is there any problem for the Bike, I saw that the temp sensor is connected only to the gauge, the signal is not going to the ecu...

[rbm]

I downloaded the manual for the Daytona meter you showed and this figure is in the schematic diagram in that manual:



The symbol is a variable resistor and the value is shown as 100K.  It specifically recommends not to use other aftermarket sensors

There are several temp sensors on the K-bke but they have specific purposes and should be left that way.  There is a prepared threaded hole in the water-oil pump that is earmarked for the optional BMW water temp sensor. Find a temp sensor that fits in that hole.  The tricky part will be locating a sensor of the right value and with the right thread size and sufficiently short in length so that is does not interfere with the impeller inside the pump.  I don't have any suggestions about what sensor fits this application.

[frankenduck]

The water pump temp sensor does not matter.

What matters is the temp sensor at the front of the cylinder head that is used by the Motronic (ECU). When the Motronic sees a temp of 115C (239F) it lights up the overheat warning bulb by grounding the brown/black light to the instrument cluster.

If you have that wired up to a warning light in your cluster then that will let you know if you're having overheating issues.

[rbm]

Heh @frankenduck, I think the poster wants an analog display of the current water temperature to appear on his Daytona gauge.  Certainly you are correct to say that the minimal needs for understanding K-bike water temperature is the overheat indication coming out of the temperature module.  But that's not meeting the real requirement.

I think I am correct that too long of a sensor will interfere with the impeller in the water pump so a very short sensor has to be used.

[frankenduck]

The BMW water pump temp sensor is M10x1 threads - 11 mm long.



To me, a temp gauge/meter is a novelty and wondering about the temp while riding is an unnecessary distraction. I pretty much never look at the temp gauge when riding as I prefer to pay attention to situational awareness.

[Laitch]

To me, a temp gauge/meter is a novelty . . .

One of the lesser-known adult novelties, to be sure. 

[frankenduck]

I have a more useful temp gauge installed in my K1100RS - it shows the ambient air temp.

[The Mighty Gryphon]

The temperature gauge provides a certain measure of dark amusement when stuck in non-moving traffic in 90F while one considers which option is better; running the engine consuming fuel with no forward motion and using the fan, or the drain on the battery and starter when starting the engine four times to travel 25 feet.