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      06-03-2016, 12:34 PM   #1
stealth70mde
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Coding the LIM function (Speed Limiter) to our cars

Hello,

I just FDL coded the LIM function (Limit) to my car and I love it.

It's similar to what Cruise Control is but with a twist.
With Cruise Control you set a specific speed and it will hold it until you brake or cancelling it.

With LIM, you set a Maximum you don't want to go beyond and you have free range of speeds below that.

Once you reach the max set speed, the LIM function will not let you go passed it.
If you want to go faster than the set speed, you really need to press the accelerator almost to the floor to speed up passed the LIM set speed.

Anyway, I find the LIM function very useful in some situations. It works great in slow urban areas and where you know there are cops watching.

Below are the codes to change to enable LIM.

KOMBI 3003 SLD_ENABLE aktiv (This one was already set at aktiv in my car)
ICM 3000 C_SLD_Funktion aktiv
ICM 3000 C_Umschaltung_ACC_DCC zugelassen


Now, once you FDL coded KOMBI and ICM, for US cars, you just need to press the SET button on your steering wheel . The system will register this as the set speed.
There will be a green LIM light on the instrument cluster and if you have the HUD, you will see a green "Limit xxx" that tells you your limit set speed. I guess if you don't have the HUD, this info info might be located in the extended instrument cluster.
You can adjust the set speed with the rocker control just below the SET button as you would normally with Cruise Control.

This doesn't disable Cruise Control, it's just a different system.

To have LIM ready to work, the cruise control cannot be ON at the same time.

Enjoy.

Last edited by stealth70mde; 06-09-2016 at 07:37 PM.. Reason: Fixed one of the parameters
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      06-05-2016, 12:24 PM   #2
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Once my power supply comes in I plan on coding this in. It will prove very useful in areas where I know I need to behave.

I assume to cancel the LIM setting you just push the SET button again, yeah?
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      06-05-2016, 02:19 PM   #3
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Quote:
Originally Posted by jwzimm View Post
I assume to cancel the LIM setting you just push the SET button again, yeah?
Yes, just press the SET button again to deactivate LIM.
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      06-05-2016, 02:28 PM   #4
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Quote:
Originally Posted by stealth70mde View Post
Yes, just press the SET button again to deactivate LIM.
Nice! Thanks for clearing that up. This seems like a very useful feature (moreso than CC I think).
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      06-05-2016, 03:16 PM   #5
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It's a nice feature but now my wife is always asking if the LIM is ON when she rides with me
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      06-05-2016, 03:59 PM   #6
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for posting this. I will definitely code this also. I find the "Set" button to be pretty useless since I always use the toggle buttons to set the cruise control. Might as well have the "Set" button have a true purpose .
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      06-06-2016, 02:21 AM   #7
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Just be aware that LIM will turn on traction control. I found this out the hard way after exiting the freeway. I needed to get up to speed quick to merge and the traction control kicked in and scared the crap out of me. I now press the traction control button when I get off the freeway.
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      06-07-2016, 04:47 AM   #8
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Can someone tell me how to code the car so I can't turn too fast too? Shit, I may as well have purchased a 428i!! I'm returning this car.
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      06-09-2016, 12:52 AM   #9
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Quote:
Originally Posted by 2sporty View Post
Can someone tell me how to code the car so I can't turn too fast too? Shit, I may as well have purchased a 428i!! I'm returning this car.
It doesn't stop you from driving fast. It's a settable feature just like cruise control. This method lets you use your foot to slow down and speed up instead of the up/down button. Then again, maybe you should sell this car because it comes with cruise control
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      06-09-2016, 01:45 AM   #10
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Quote:
Originally Posted by psedog View Post
It doesn't stop you from driving fast. It's a settable feature just like cruise control. This method lets you use your foot to slow down and speed up instead of the up/down button. Then again, maybe you should sell this car because it comes with cruise control
how about just use your foot to slow down and speed up?
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      06-09-2016, 02:22 AM   #11
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Quote:
Originally Posted by 2sporty View Post
how about just use your foot to slow down and speed up?
Re-read my post. That's exactly what I said...

Lim just helps to keep you under the limit you set. You still hold all control with your foot. If you want to go past the limit you set just mash the gas. These are street cars that travel on highways/freeways/tollways that have police patrolling looking for speeders. Most of us aren't trying to get tickets. This is just another tool to help with that. You don't have to want it or like it, but that doesn't take away from the car nor the driver.
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      06-09-2016, 02:50 AM   #12
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Quote:
Originally Posted by psedog View Post
Re-read my post. That's exactly what I said...

Lim just helps to keep you under the limit you set. You still hold all control with your foot. If you want to go past the limit you set just mash the gas. These are street cars that travel on highways/freeways/tollways that have police patrolling looking for speeders. Most of us aren't trying to get tickets. This is just another tool to help with that. You don't have to want it or like it, but that doesn't take away from the car nor the driver.
re-read my post. oh, btw, here's a protip for you: you can use your eyes for watching the speed.
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      06-09-2016, 06:32 AM   #13
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Quote:
Originally Posted by 2sporty View Post
re-read my post. oh, btw, here's a protip for you: you can use your eyes for watching the speed.
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      06-09-2016, 08:48 AM   #14
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Just coded this last night. I like it. Keeps you honest in areas where you know the cops are watching like hawks.

Btw, small correction to your codes:

KOMBI 3003 SLD_ENABLE aktiv (This one was already set at aktiv in my car)
ICM 3000 C_SLD_Funktion aktiv
ICM 3000 C_Umschaltung_ACC_DCC zugelassen
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      06-09-2016, 08:49 AM   #15
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Quote:
Originally Posted by 2sporty View Post
re-read my post. oh, btw, here's a protip for you: you can use your eyes for watching the speed.
No need to be rude. If you don't want to use this feature, then don't. You don't need to go insulting those that like it.
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      06-09-2016, 01:58 PM   #16
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This is awesome. Thanks for the tip!
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      06-09-2016, 07:37 PM   #17
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Quote:
Originally Posted by jwzimm View Post
Just coded this last night. I like it. Keeps you honest in areas where you know the cops are watching like hawks.

Btw, small correction to your codes:

KOMBI 3003 SLD_ENABLE aktiv (This one was already set at aktiv in my car)
ICM 3000 C_SLD_Funktion aktiv
ICM 3000 C_Umschaltung_ACC_DCC zugelassen
Corrected, thanks!
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      06-20-2016, 06:25 PM   #18
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Hi guys,

Here's a little update on the LIM and cruise control interaction.

Today was the first time where I did 3 hours of highway driving so I could test stuff better.

Activating LIM changes how the cruise control works...

The SET button is now solely for LIM.

If you want to use the Cruise control now, only the CC ON/OFF/Cancel and the RES buttons control the functions.

To set your speed for CC you turn ON the CC like usual but you set your speed via the RES button now. Once set, you can cancel the CC using the ON/OFF button and resume with the RES as usual. Only setting the initial CC speed has changed.

Cheers.
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      06-20-2016, 07:51 PM   #19
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Quote:
Originally Posted by stealth70mde View Post
Hi guys,

Here's a little update on the LIM and cruise control interaction.

Today was the first time where I did 3 hours of highway driving so I could test stuff better.

Activating LIM changes how the cruise control works...

The SET button is now solely for LIM.

If you want to use the Cruise control now, only the CC ON/OFF/Cancel and the RES buttons control the functions.

To set your speed for CC you turn ON the CC like usual but you set your speed via the RES button now. Once set, you can cancel the CC using the ON/OFF button and resume with the RES as usual. Only setting the initial CC speed has changed.

Cheers.
I assume the toggle buttons to increase and decrease the cruise control set speed (by 1km/h light push or 10km/h hard push) still function as usual ?

If so, they can also be used to "set" the desired speed.
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      06-20-2016, 10:13 PM   #20
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Quote:
Originally Posted by CanAutM3 View Post
I assume the toggle buttons to increase and decrease the cruise control set speed (by 1km/h light push or 10km/h hard push) still function as usual ?

If so, they can also be used to "set" the desired speed.
Yes, absolutely. The rocker switch behaves the same. Good point!
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      08-22-2020, 08:47 PM   #21
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Quote:
Originally Posted by psedog View Post
Just be aware that LIM will turn on traction control. I found this out the hard way after exiting the freeway. I needed to get up to speed quick to merge and the traction control kicked in and scared the crap out of me. I now press the traction control button when I get off the freeway.
Could you describe more what had happened please? How the traction control could be dangerous than helping to stabilise the vehicle?
Thanks. [beers]
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      01-21-2021, 03:12 PM   #22
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Quote:
Originally Posted by stealth70mde View Post
Hello,

I just FDL coded the LIM function (Limit) to my car and I love it.

It's similar to what Cruise Control is but with a twist.
With Cruise Control you set a specific speed and it will hold it until you brake or cancelling it.

With LIM, you set a Maximum you don't want to go beyond and you have free range of speeds below that.

Once you reach the max set speed, the LIM function will not let you go passed it.
If you want to go faster than the set speed, you really need to press the accelerator almost to the floor to speed up passed the LIM set speed.

Anyway, I find the LIM function very useful in some situations. It works great in slow urban areas and where you know there are cops watching.

Below are the codes to change to enable LIM.

KOMBI 3003 SLD_ENABLE aktiv (This one was already set at aktiv in my car)
ICM 3000 C_SLD_Funktion aktiv
ICM 3000 C_Umschaltung_ACC_DCC zugelassen


Now, once you FDL coded KOMBI and ICM, for US cars, you just need to press the SET button on your steering wheel . The system will register this as the set speed.
There will be a green LIM light on the instrument cluster and if you have the HUD, you will see a green "Limit xxx" that tells you your limit set speed. I guess if you don't have the HUD, this info info might be located in the extended instrument cluster.
You can adjust the set speed with the rocker control just below the SET button as you would normally with Cruise Control.

This doesn't disable Cruise Control, it's just a different system.

To have LIM ready to work, the cruise control cannot be ON at the same time.

Enjoy.
Great post! I coded this today into my n55 F10 LCI (NBT). However I do understand this was for f90/f30 chassis.

Just things I would like to point out that affected my f10 (not saying it will happen to f80/f30)

Specific to my f10

  • No LIM on HUD, it doesn't show up on my factory HUD, but i have used bimmer code to enable blinkers to show up on hud so maybe i could have f'd something up then

  • You cannot use LIM and Cruise Control at the same time If you enable one the other shuts off -- Sometimes you're cruising and just want to overtake but don't wanna 99mph accidentally, would be nice if both can be enabled at once (LIM and Cruise).

Overall I'm sure what i mentioned above can be solved with coding. This is a solid add to anyone who doesn't wanna keep taking their eyes off the road to check their speed.


Thanks OP!
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