[BIZKIT551]

I've recently acquired the correct stalk set (forgot the correct term) along with the correct LDM module for my car which is a 2006 330i.

I am trying to get $544 (Cruise control with braking) working on my car.



My car didn't come with any form of CC, but it was offered with it from the dealer as an option. I am planning to retrofit this to my car, but I hit a bit of a hurdle.

I've been on this forum trying to find a guide to wiring the LDM module.
I am still not sure which wires go to where exactly on the CAS and which slots on the harnesses (CAS + LDM) need to be pinned or depinned.

As far as coding the CC goes, there are quite a few tutorials on YouTube that show this but I cant find any about the LDM.

i hope someone can give me some pointers.

Many thanks

[NZE90]

Search this forum and you will find the info you need.

[shannon1]

Go to this thread

https://www.e90post.com/forums/showthread.php?t=1530925

[BIZKIT551]

Originally Posted by shannon1

Go to this thread

https://www.e90post.com/forums/showthread.php?t=1530925

I've been reading this very tutorial as well as some others, but I don't really understand how he wired it. He also fitted active cruise control which is different from my basic cruise control with braking. Not sure if there's a difference in how the LDM is wired in that regard.

[shannon1]

Originally Posted by BIZKIT551

I've been reading this very tutorial as well as some others, but I don't really understand how he wired it. He also fitted active cruise control which is different from my basic cruise control with braking. Not sure if there's a difference in how the LDM is wired in that regard.

My car had cruise + braking prior to upgrading it myself to adaptive cruise. My car is a 2007 model 323i E91 and I didn't have an LDM fitted (I had to fit it make the adaptive cruise work). I don't think you need the LDM to get the normal cruise + braking working, just a DSC unit with the braking function which yours would not have if you don't have cruise to begin with.

[BIZKIT551]

Originally Posted by shannon1

My car had cruise + braking prior to upgrading it myself to adaptive cruise. My car is a 2007 model 323i E91 and I didn't have an LDM fitted (I had to fit it make the adaptive cruise work). I don't think you need the LDM to get the normal cruise + braking working, just a DSC unit with the braking function which yours would not have if you don't have cruise to begin with.

Is the braking function not electronically controlled in this case? Is there something else I need to retrofit so my car can brake electronically or do I just slap on the cruise control stalk and code $544 to the ecu's and that will do?

From my understanding it seemed like I needed the LDM in order to get the braking function to work. I guess this is one of the problems I am having with this install haha, because I am reading different threads that all talk about retrofitting or upgrading their existing CC and some say I need an LDM and some say that I don't.

[NZE90]

Originally Posted by BIZKIT551

Is the braking function not electronically controlled in this case? Is there something else I need to retrofit so my car can brake electronically or do I just slap on the cruise control stalk and code $544 to the ecu's and that will do?

From my understanding it seemed like I needed the LDM in order to get the braking function to work. I guess this is one of the problems I am having with this install haha, because I am reading different threads that all talk about retrofitting or upgrading their existing CC and some say I need an LDM and some say that I don't.

It depends what build date your car is. I can't remember exactly but after 04/2006 (i think) build date, the LDM module was discontinued. On the later cars the LDM was integrated into the DSC module.

[BIZKIT551]

Originally Posted by NZE90

It depends what build date your car is. I can't remember exactly but after 04/2006 (i think) build date, the LDM module was discontinued. On the later cars the LDM was integrated into the DSC module.

So according to the VIN the build date for my car is August 2006 which would mean that LDC is built into the DSC?

If this is indeed the case that means I can just code $544 and it would work?

[NZE90]

You may want to research the date i gave, my memory is a little hazy as it was 6 years ago. I did this exact retrofit to my old E90 that had no cruise fitted, but i had to fit an LDM as my build date was 1/2006

Edit. Just confirmed i was wrong with that date. The E90 had an LDM fitted up until 9/2006. So you will need to install one and splice into the pt-can. I think i used the pt-can wires that go to the FRM and got 15wup from the CAS.

[BIZKIT551]

Originally Posted by NZE90

You may want to research the date i gave, my memory is a little hazy as it was 6 years ago. I did this exact retrofit to my old E90 that had no cruise fitted, but i had to fit an LDM as my build date was 1/2006

Edit. Just confirmed i was wrong with that date. The E90 had an LDM fitted up until 9/2006. So you will need to install one and splice into the pt-can. I think i used the pt-can wires that go to the FRM and got 15wup from the CAS.

Great so LDM is needed. The next thing is how do know which ones are PT-Can and power? Is there a wiring diagram somewhere you could point me to? Sorry for requesting so much, I am trying to get this working without issues so I can write up a guide later on how to retrofit CC and LDM module since there isn't really one that shows this.

[shannon1]

If you ignore the ACC sensor, this wiring diagram shows how to wire the LDM into the CAS and FRM if you have adaptive headlights. If not, then sorry I don't know where to get the PT-CAN wires from.

[BIZKIT551]

Originally Posted by shannon1

If you ignore the ACC sensor, this wiring diagram shows how to wire the LDM into the CAS and FRM if you have adaptive headlights. If not, then sorry I don't know where to get the PT-CAN wires from.

Wow thanks this diagram will be a great help.
Btw how do I know if I have adaptive headlights?
My car came with Xenons installed does that mean it's adaptive or is there some special mechanism for it?

[NZE90]

Originally Posted by BIZKIT551

Wow thanks this diagram will be a great help.
Btw how do I know if I have adaptive headlights?
My car came with Xenons installed does that mean it's adaptive or is there some special mechanism for it?

Bear in mind that your car uses a differnt fuse for the cruise control as it is an earlier model. Diagram for the early model attached.

There are 2 types of xenons, adaptive ( the lights swivel when cornering, and non adaptive) If you have any type of xenons you should have pt-can at the FRM. Mine did.

[BIZKIT551]

Originally Posted by NZE90

Bear in mind that your car uses a differnt fuse for the cruise control as it is an earlier model. Diagram for the early model attached.

There are 2 types of xenons, adaptive ( the lights swivel when cornering, and non adaptive) If you have any type of xenons you should have pt-can at the FRM. Mine did.

Thank you for providing the diagram.
Mine don't seem to swivel but as long as the PT-Cans are there then it shouldn't be an issue.

So once I get the LDM hooked up correctly will it be detected automatically, or do I need to use NCS expert to code it in?

[NZE90]

Yes code it to the car and add 544 to the vehicle order in the CAS and FRM

[BIZKIT551]

Originally Posted by NZE90

Yes code it to the car and add 544 to the vehicle order in the CAS and FRM

Do I add LDM through NCS expert or is there another tool that I have to use?
I see threads on this forum where people say they coded the LDM module to the car but no one speaks of how exactly they went about doing so unless I'm missing something.

[NZE90]

Yes code it with NCS the same way you would with the other control units, but change the v/o first.