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-   -   How does the TPMS on E46 M3 work? (http://forum.e46fanatics.com/showthread.php?t=917710)

B4MC1S 04-24-2012 05:43 PM

How does the TPMS on E46 M3 work?
 
I recently installed new rims. And my TPMS light is going off. I have searched countless post, but it does not answer my question. Are the TPMS for 2004 E46 M3 direct or indirect? Meaning is the sensor installed inside the wheel or is it based of the ABS. Also if it is not indirect, that means I will have to install new sensors on the new rims, right? Any help is appreciated.

Thank you!

delmarco 01-20-2013 01:55 PM

All years M3 the sensors were based on dsc/abs/wheel speed-spin sensor. This meant that changing your rims (IE getting bigger rims) would change the way the system is reading the wheels.

Any change in rotational speeds and is senses like you got a flat tire.

wildpig 01-20-2013 05:16 PM

Outer diameter of all wheels must match original or else flat tire warnings will trigger.

Now I thought that if you hold down the tire warning button, shouldn't it reset and adapt to the new tire spec?

illestminimike 01-20-2013 05:48 PM

Look up the procedure to reset it. I can't quite remember how it's done. The light will go away. Don't worry.

Alan 01-20-2013 06:28 PM

Quote:

Originally Posted by wildpig (Post 15079268)
Outer diameter of all wheels must match original or else flat tire warnings will trigger.

Now I thought that if you hold down the tire warning button, shouldn't it reset and adapt to the new tire spec?


1. No

2. No

3. Read you manual.






http://i3.photobucket.com/albums/y91...older/rtfm.jpg

B4MC1S 01-20-2013 06:34 PM

I resolved the issue a while back. If you have the RED warning sign, press down the tire warning button to make it go away. But if you want your vehicle to recognize new wheels, press the tire warning button once so it lights up YELLOW. And drive your vehicle around while it's YELLOW and the YELLOW indicator will go away once vehicle recognizes your new setup.

Alan 01-20-2013 06:36 PM

Quote:

Originally Posted by B4MC1S (Post 15079462)
I resolved the issue a while back. If you have the RED warning sign, press down the tire warning button to make it go away. But if you want your vehicle to recognize new wheels, press the tire warning button once so it lights up YELLOW. And drive your vehicle around while it's YELLOW and the YELLOW indicator will go away once vehicle recognizes your new setup.


Thats interesting - but it is not the re-learn new diameters procedure.

B4MC1S 01-20-2013 06:48 PM

Quote:

Originally Posted by Alan (Post 15079467)
Thats interesting - but it is not the re-learn new diameters procedure.

I am not sure of any other methods of re-learning new diameters, but I followed the procedure mentioned in the manual:

http://i1212.photobucket.com/albums/...ps448299a0.png


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