Can bus BMW E46 instrument, temp gauge problem

[Thomas Bakke]

Hello

I have a can-bus module connected to my E46 instrument cluster, i works ok.
it's a track car so the only functions i need is: Rev-counter, oilpressure warning og temp gauge.

while racing this weekend, the temp gauge was very steady, right in the middle.
But then the red temp gauge light went on for about 20 seconds, went out, and then on again several times. -still with the needle in the middle.

I have no way of telling how hot the engine actually was.
Is the needle wrong, or the light wrong, or is there something else that turns on the red light?

-The instrument is only connected to the EMU. -there is no coolant level connected.
-the needle is not stuck (when i turn the main switch - the needle goes alle the way up an down)

thanks in advance

[RHD]

BMW temp gauges are filtered so the needle stays in the middle no matter how much the temp fluctuates, then if it gets to a certain high temp it will suddenly go to hot! The only way to check is to log your races with the PC or the DL-1 logger or use the BT dongle to monitor and or record the temps on your phone

[Thomas Bakke]

Thanks.

But it seems weird that the needle stays in the middle, while the light is on?
I will fix another Way ro read the temp, but i would really like to know if i do have a cooling problem.

[cmj]

Thanks.

But it seems weird that the needle stays in the middle, while the light is on?
I will fix another Way ro read the temp, but i would really like to know if i do have a cooling problem.

Can we revisit this?

Based on this video https://www.youtube.com/watch?v=FTOrUbbu_RU Thanial is running the temp gauge throughout the range.

Here is the CAN Message information.

Code: Select all

ARBID: 0x329 (DME2)
-B0
-B1 is Temp [Temp in C = .75 * hex2dec(byte01) - 48.373]
-B2
-B3
-B4
-B5 Throttle position (00-FE).
-B6 kickdown switch depressed is value (4) Brake pedal depressed is value (1).
-B7

I feel as if this can be improved.

[Jadzwin]

PLease contact me at info(at)ecumaster.com, we will prepare new can stream for you to check if helps