[Leucosticte]

Originally Posted by Rupppi

After some detour (retrofitting $470) to test my tools, some further baby steps.
I have now both modules in the tree in ISTA+ with writing the VO to CAS.
Attachment 3629654
CAS, KOMBI and ACC are coded, DSC and LDM are failing with VB31 chassis, but I had only one shot before running out of battery (I couldn't even check for codes, not that it would much sense at this point).

Ok, run the scan in ISTA and see what shows up in the module tree and whether or not you can communicate to the LDM.

[Rupppi]

Originally Posted by Leucosticte

Ok, run the scan in ISTA and see what shows up in the module tree and whether or not you can communicate to the LDM.

Module tree was attached, I hope it was visible.
After a few tries (no clue what went wrong), DSC is coded, but still no luck with the LDM (IFH-0009 in LDM_90).
Finally CCC tells me, ACC has a malfunction (so it is recognized) + electrical error.
Error codes:
JBBF: C90B
DME: CD87, CD8F, 2DC3
EKP: CEC7
DSC D35B, D35A
It looks like mostly PT-CAN communication errors. The ACC could be coded, this sounds promising, the error with the LDM might cause this. I wonder how clever it was attaching the FRM to the BUS without AHL, because now it is at least a distraction.
So far CAPPL never worked, is that necessary or is it just for display? (If yes, does it need to be coded with MOST or works with the normal OBD cable?)

ps.: Next I'll try to remove the fuse of the LDM, that would reveal if that's the module messing up the can bus, or not.

[Leucosticte]

Originally Posted by Rupppi

Module tree was attached, I hope it was visible.
After a few tries (no clue what went wrong), DSC is coded, but still no luck with the LDM (IFH-0009 in LDM_90).
Finally CCC tells me, ACC has a malfunction (so it is recognized) + electrical error.
Error codes:
JBBF: C90B
DME: CD87, CD8F, 2DC3
EKP: CEC7
DSC D35B, D35A
It looks like mostly PT-CAN communication errors. The ACC could be coded, this sounds promising, the error with the LDM might cause this. I wonder how clever it was attaching the FRM to the BUS without AHL, because now it is at least a distraction.
So far CAPPL never worked, is that necessary or is it just for display? (If yes, does it need to be coded with MOST or works with the normal OBD cable?)

Yes, I saw your module tree but they were all grayed out. This implies to me that you didn't run the vehicle test. The vehicle test colors the modules Red/Green/Yellow, etc. based on what state the module is in, this would be very useful as we can easily figure out what modules are having comms. difficulties. This is a better way to test things in my opinion since you have a graphical view of things rather than using NCS to find out that you can't communicate with a module.

Edit: The module should not cause comms. issues unless PT-CAN is backwards.

[Rupppi]

Originally Posted by Leucosticte

Yes, I saw your module tree but they were all grayed out. This implies to me that you didn't run the vehicle test. The vehicle test colors the modules Red/Green/Yellow, etc. based on what state the module is in, this would be very useful as we can easily figure out what modules are having comms. difficulties. This is a better way to test things in my opinion since you have a graphical view of things rather than using NCS to find out that you can't communicate with a module.

Edit: The module should not cause comms. issues unless PT-CAN is backwards.

Sorry, this is my first ever BMW, so I feel a bit lost with the tools. You're completely right, I run without tests.
Now I removed the fuse of the LDM and clear the error codes only some came back:
ACC D17E
DSC D35B

My suspicion is the same, what you wrote, I might have LDM module's lines messed up.
Tomorrow I'll double check and report back.

I really appreciate your help, thank you!

[colorado.e9x]

Originally Posted by Leucosticte

Doesn't yours have the lens heating error? This can be coded out.

Yes. I haven't had any success with it the few times I've tried. It's been on the back burner all year, lost motivation. Willing to just cut my losses and buy another

[Leucosticte]

Originally Posted by colorado.e9x

Yes. I haven't had any success with it the few times I've tried. It's been on the back burner all year, lost motivation. Willing to just cut my losses and buy another

I didn't have any problems doing it, definitely don't think that it's worth spending another $300-$400 on.

I used the guide at the bottom of this thread:
https://www.bimmerfest.com/threads/d...g-off.1344529/

[colorado.e9x]

Originally Posted by Leucosticte

I didn't have any problems doing it, definitely don't think that it's worth spending another $300-$400 on.

I used the guide at the bottom of this thread:
https://www.bimmerfest.com/threads/diy-acc2-lens-heating-disabling-coding-off.1344529/

The one cube something posted? I tried that to no avail 😅 Might try again after hearing that. It okay if I pick your brain at some point?

[Leucosticte]

Originally Posted by colorado.e9x

The one cube something posted? I tried that to no avail 😅 Might try again after hearing that. It okay if I pick your brain at some point?

Yeah sure, just message me, it can be a bit confusing.

[Rupppi]

I got back to the LDM connector, the pins seemed to be right, still I swapped PT high and low, to test what happens.

No electrical malfunction message anymore, but the LDM still doesn't respond to anything (ISTA+, NCSExpert coding).


With this polarity, the LDM is not producing CAN errors, but also not working, this is puzzling for me. The fact it's producing errors with one setup tells me that it got power and the wake-up signal, otherwise I would expect it to be silent, but then the other one should work and it does nothing I guess.
I could code the ACC entry, that would tell me that the sensor is working and cabled fine.
I'm a bit lost now as there are only so many options for the can bus. I might just take it for a ride and check how far I can go with the calibration.

[Leucosticte]

Originally Posted by Rupppi

I got back to the LDM connector, the pins seemed to be right, still I swapped PT high and low, to test what happens.
Attachment 3630180
No electrical malfunction message anymore, but the LDM still doesn't respond to anything (ISTA+, NCSExpert coding).
Attachment 3630181

With this polarity, the LDM is not producing CAN errors, but also not working, this is puzzling for me. The fact it's producing errors with one setup tells me that it got power and the wake-up signal, otherwise I would expect it to be silent, but then the other one should work and it does nothing I guess.
I could code the ACC entry, that would tell me that the sensor is working and cabled fine.
I'm a bit lost now as there are only so many options for the can bus. I might just take it for a ride and check how far I can go with the calibration.

Ok, so from what it sounds like we're in the same situation. All connections are made properly but the LDM refuses to communicate.

I don't have a code on my ACC module for PT-CAN communication though, maybe there's something else wrong with your wiring that you should double check? The code on my ACC module went along the lines of "No Longitudinal Dynamics Module Detected"

I'm still waiting for the pins to come in so I can run DCAN for my new JBE, I will update when I get that wiring setup and let you know if it changes anything. I highly doubt it will, because it seems unlikely that out of all the people that have done this retrofit, I'm the only one who needs a new junction box.

[Rupppi]

You already tried with two different LDMs, right? I would exclude a faulty module then.
Where do you have the wake up signal from? (I stole from CAS 19) I read somewhere wrong timing of the wake up could be a problem, but according to the ISTA wiring diagram that should be OK.
What about the PT CAN? Mine is sourced from the junctionbox 5-6 and not 1-2 which were already occupied (DME and DSC I guess). Would be strange that it works for the ACC but not for the LDM, but some also stated that the LDM is just a slave unit of the DSC. So they might not like to be on a "separate" ring.
I'm just guessing because I don't see any logic in it for now.

link of the other topic with similar issue

[Leucosticte]

Originally Posted by Rupppi

You already tried with two different LDMs, right? I would exclude a faulty module then.
Where do you have the wake up signal from? (I stole from CAS 19) I read somewhere wrong timing of the wake up could be a problem, but according to the ISTA wiring diagram that should be OK.
What about the PT CAN? Mine is sourced from the junctionbox 5-6 and not 1-2 which were already occupied (DME and DSC I guess). Would be strange that it works for the ACC but not for the LDM, but some also stated that the LDM is just a slave unit of the DSC. So they might not like to be on a "separate" ring.
I'm just guessing because I don't see any logic in it for now.

link of the other topic with similar issue

Yes, I tried with 2 different LDMs, neither communicated but after about 15 minutes the processors in them got up to operating temperature, so they're definitely getting power.

I also took my LDM wakeup signal from CAS pin 19, I've also seen people use the dedicated ACC wakeup on the CAS with no issues.

PT-CAN is taken from the FRM because I have adaptive headlights. From my understanding of CANbus, it shouldn't matter where you're tapping into the bus from, so it being a slave of the DSC shouldn't matter as long as they're both on PT-CAN. Where did you find the info about the LDM being a slave unit of the DSC and needing to share the same wires with it? I could try using the DSC PT-CAN wires as a last ditch effort.

I hooked up a USB-CAN adapter I have and was able to receive CAN data via the adapter, so it seems like my CAN connection is also fine, which leads to either my junction box not supporting it (unlikely) or some other problem which I don't understand.

[Rupppi]

I started comparing pre-LCI setup with LCI. ISTA+ is not fully consistent, with the different documents containing different data.
Junction box SSP claims the fuses are for the ACC F9 and LDM F22, PIB says ACC F21, LDM F65. The SSP seems to be correct F65 is a 40A for me, which seems ok for the DSC. F9, F21, F22 at least are hanging on 30G, so no functional difference.

The PT-CAN SSP has different versions, LDM is once next to FRM, other times next to DME. I would exclude the position as a problem.
The connections' pins are always the same. On the connector X14271 (see under 4010a) the connectors for the PT-CAN are always pin 1-2, according to the PIB 5-6 and 42-43 are also PT I/O ports, but only the first 2 are marked as "Connector". As you sourced from the FRM, this can also not be the weak link for both of us.

The DSCs (preLCI 34516775394, LCI 34516863356) are different "E92 (<06/2006), E90 and E91(<09/2006), E93 (<12/2006) On vehicle with option 544 ”Cruise control with brake function”, there is no LDM control unit fitted. Because of a software modification in the DSC control unit (DSC Mk60E5), the DSC control unit assumes control of the functions of the LDM control unit". $541 still needs the additional LDM for some reason.
This could partially explain why some had no difficulties, but with preLCIs we face some trouble.

I'm also mainly afraid of the I don't understand (yet) and not documented possibility.

[Leucosticte]

Originally Posted by Rupppi

I started comparing pre-LCI setup with LCI. ISTA+ is not fully consistent, with the different documents containing different data.
Junction box SSP claims the fuses are for the ACC F9 and LDM F22, PIB says ACC F21, LDM F65. The SSP seems to be correct F65 is a 40A for me, which seems ok for the DSC. F9, F21, F22 at least are hanging on 30G, so no functional difference.

The PT-CAN SSP has different versions, LDM is once next to FRM, other times next to DME. I would exclude the position as a problem.
The connections' pins are always the same. On the connector X14271 (see under 4010a) the connectors for the PT-CAN are always pin 1-2, according to the PIB 5-6 and 42-43 are also PT I/O ports, but only the first 2 are marked as "Connector". As you sourced from the FRM, this can also not be the weak link for both of us.

The DSCs (preLCI 34516775394, LCI 34516863356) are different "E92 (<06/2006), E90 and E91(<09/2006), E93 (<12/2006) On vehicle with option 544 ”Cruise control with brake function”, there is no LDM control unit fitted. Because of a software modification in the DSC control unit (DSC Mk60E5), the DSC control unit assumes control of the functions of the LDM control unit". $541 still needs the additional LDM for some reason.
This could partially explain why some had no difficulties, but with preLCIs we face some trouble.

I'm also mainly afraid of the I don't understand (yet) and not documented possibility.

I have a newer DSC though, I have one from a 2011 328i because I had to swap mine out due to issues, so I don't think the DSC unit is to blame either.

Today I should get around to doing the JBBF wiring, the pins finally came in, I'll let you know what I find.

When you add fuses, are you taking out the fuse box and adding the leaf contact behind it? How difficult is that to do?

[Rupppi]

I think I have a new lead. I ignored this information so far but it can be crucial. The PT CAN should have a resistance of 60 ohms to be able to communicate. Not all controllers have resistance in them, I guess the ACC doesn't have any. So if you install only that, you can get away with it. In my case I have a "new" bus so I should check the resistance of the ring.
Edit: I have 180ohms at the LDM. The module itself is open circuit, makes sense as an optional element. Strange that the ACC communicated, so I'm not fully convinced.

Getting the fuse box out is not a dream job, for some nuts of it there's no clear access, and you do some 3D tetris with the glove box. It's a bit frustrating, but with hindsight and muscle memory it's doable for the 2nd time.
3 core memories I have about it:
- upper left nut of the fuse box is a pain to reach. Lowering the fan is needed, some just drilled through the frame of the fan.
- cap of the main 12V has two tiny triangles as a restrain (ISTA is not so specific)
- main 12V might be fixed from behind but even if not is tricky to pull forward
Good luck with it, ask if you would stuck somewhere.


PS.: realoem is strange about my LDM. Only its predecessor is listed for e90, maybe the module is too old? Can you please check yours?

[Leucosticte]

Originally Posted by Rupppi

I think I have a new lead. I ignored this information so far but it can be crucial. The PT CAN should have a resistance of 60 ohms to be able to communicate. Not all controllers have resistance in them, I guess the ACC doesn't have any. So if you install only that, you can get away with it. In my case I have a "new" bus so I should check the resistance of the ring.
Edit: I have 180ohms at the LDM. The module itself is open circuit, makes sense as an optional element. Strange that the ACC communicated, so I'm not fully convinced.

Getting the fuse box out is not a dream job, for some nuts of it there's no clear access, and you do some 3D tetris with the glove box. It's a bit frustrating, but with hindsight and muscle memory it's doable for the 2nd time.
3 core memories I have about it:
- upper left nut of the fuse box is a pain to reach. Lowering the fan is needed, some just drilled through the frame of the fan.
- cap of the main 12V has two tiny triangles as a restrain (ISTA is not so specific)
- main 12V might be fixed from behind but even if not is tricky to pull forward
Good luck with it, ask if you would stuck somewhere.


PS.: realoem is strange about my LDM. Only its predecessor is listed for e90, maybe the module is too old? Can you please check yours?

Well unfortunately this weekend I was busy with other things, so I didn't get around to rewiring my OBD port and testing if that fixed my LDM issue.

The terminating resistor concept is interesting, I looked up some info and I found that the terminating resistors are located in the DSC and some other module, I can't find an accurate source but I've seen anything from JBE/EKP/DME, either way, the LDM shouldn't need anything special to communicate, after all, I was able to use my USB-CAN device with no issues.

Either way I'll measure resistance on PT-CAN with the LDM plugged in and see what it is.

I forgot the E9x fuse box is easier to remove than the 1 series, so maybe I'll get around to doing and properly add the fuses instead of just using fuse taps.

The LDM version shouldn't matter, since RealOEM marks it as "exchangeable retrospectively"

[Rupppi]

I managed to fit the BUS adding the necessary resistor (as mentioned I have a new ring only with ACC, LDM and FRM) but no improvement. It didn't strike me as I could program the ACC before, but also it won't hurt to have it right.
I'm running out of ideas tbh.
Strange is that in tool32 the initial seems to be successful, but any other command fails with a communication error. I might try to NFS flash it.

[Leucosticte]

Originally Posted by Rupppi

I managed to fit the BUS adding the necessary resistor (as mentioned I have a new ring only with ACC, LDM and FRM) but no improvement. It didn't strike me as I could program the ACC before, but also it won't hurt to have it right.
I'm running out of ideas tbh.
Strange is that in tool32 the initial seems to be successful, but any other command fails with a communication error. I might try to NFS flash it.

I don't see how NFS flashing will fix it to be honest... it would have to be in programming abort state to do anything.

When I get around to wiring up the JBE DCAN properly I'll let you know if it helps.

[Rupppi]

Quick update: JBE pin 1-2 had the proper resistance. Instead sourcing from 5-6, I moved the CAN connection there with a splitters. Remeasured the LCM lines as well, they were in the right order originally. First time ever I couldn't only talk to the module but code it without an error, then my laptop's battery ran out of juice.
Edit: That was it! ACC works on a 03/2006 preLCI E87 130i. Only LCM, SZL(335i), KOMBI(E90 High) and ACC(335i) are added/swapped. I guess clutch doesn't immediately disengage the set speed which I loved in my Audi as well.

[Alexx_oprea]

Originally Posted by dumitru.o

interesting! so after you coded the ACC function, you get the D1-D6 instead of just D?

i am almost there with this retrofit, hopefully will finish next weekend

Salutare , am observat ca esti român , dețin și eu un 330xd e90 cu Acc și din păcate am avut un mic accindent in care mi sa rupt mufa de la acc , am comandat o mufa noua cu tot cu fire , mi-a montat-o mecanicul și tot nu funcționează , eu cred ca nu a legat firele in ordine corecta sau poate ar trebui recalibrat , dacă ai putea sa ma ajuți cu ordinea firelor as fi foarte recunoscător , chiar și contracost
Mersi mult

[priebe3]

I was able to retrofit an ACC sensor and LDM and get everything coded up thanks to this great guide. ACC works well, but the last step is to find and install an ACC stalk.
Unfortunately, I'm having quite a bit of trouble finding one. I've tried setting up search alerts on eBay months ago but haven't gotten any results.

I have been able to find some e60 stalks, though. I know that the ACC radar module itself is not interchangeable between e60 and e90, but has anyone tried an e60 stalk in an e90? They look about the same, but the e60 has the ability to switch between ACC and normal cruise control by pressing the switch

Otherwise, any suggestions on where to find an e90 ACC stalk?

[ptpending]

look for e71 stalk for e90
e60 stalk have different electric architecture because in e60 SZL is reachable as separate unit on bus