[dazzles]

THIS HAS BEEN RESOLVED/FIXED SEE COMMENTS FOR HELP

Hello f30 fam,
Long time lurker, first time poster. This forum is honestly fantastic so I'm hoping someone can help me navigate through this issue i'm having.

Car: 2016 328d xdrive wagon (f31)

While driving, if I get the Lane departure to activate (by driving over a lane without blinkers on as an example) i will get an error on the dash saying the lane assist is malfucntioning.

The ISTA errors are:

48004 KAFAS interface (TLC ready for operation):signal invalid
48004A SZL interface *steering wheel vibration): Signal invalid
800A07 Vibration motor in steering wheel faulty

I am thinking it may be a faulty Steering Wheel Vibration Generator, but I am not sure why I would get a KAFAS and SZL code as well.

I also should note that I also have
800BE0 and 800BDB code because my side camera is currently being replaced (i ordered it, it stopped working) but i do not think these issues are related.

Also, my active blind spot monitor that will also malfunction, not sure if it happens during lane switches with lane departure, or independently. Not sure if this is related to either the camera missing, or the lane departure issue.

Your help is greatly appreciated!

[dazzles]

Edit 1:
I ordered the vibration generator, going to keep this thread updated to help people in the future if they encounter this behavior.

[fe7565]

Originally Posted by dazzles

Edit 1:
I ordered the vibration generator, going to keep this thread updated to help people in the future if they encounter this behavior.

Sensible decision. But I would also check to exclude any power/ground/wiring issues going to the vibration motor itself.

[YASBBYM3]

I find it interesting people retrofitting this as I had it and ended up turning it off, as many others have mentioned they do the same. Maybe if driving drunk or distracted or long hours of highway driving with no sleep. Otherwise, I’m not sure of the attraction.

[fe7565]

Originally Posted by YASBBYM3

I find it interesting people retrofitting this as I had it and ended up turning it off, as many others have mentioned they do the same. Maybe if driving drunk or distracted or long hours of highway driving with no sleep. Otherwise, I’m not sure of the attraction.

I am in the process of adding lane change warning and I don't care for the vibrator (or the heater) either, but unless you are certain and you can confirm, I do not think that the lane change system would work without the steering wheel module that is designed for the heater. My car has neither a heater nor a vibrator nor electric seats, so I had to get a steering wheel module that already came with the vibrator and harness (for $80 total on Ebay). I am not retrofitting the steering wheel heater function, because I never used that even in Canada, but needed the module so the proper LIN signals are passed to/from the FEM. Unless, someone can confirm that for the lane change warning the LIN will work properly with my factory non-heating steering and non-electric seat steering wheel module.

[YASBBYM3]

Cannot be much help. On my F30 I did not have heated seats or heated steering wheel but know the leather msport steering wheel was a heated steering wheel. It is listed on realoem as needed for lane change and drivers assistance. I also know to be careful of used steering wheels as many come from cars where the airbag was deployed and replaced by insurance. BMW calls for replacing the steering wheel after airbag deployment.

https://f30.bimmerpost.com/forums/sh....php?t=2029950

[Wires]

Originally Posted by YASBBYM3

I find it interesting people retrofitting this as I had it and ended up turning it off, as many others have mentioned they do the same. Maybe if driving drunk or distracted or long hours of highway driving with no sleep. Otherwise, I’m not sure of the attraction.

Me too. Even the sales guy said it wasn't great, and he suggested I turn it off. Tried it for a bit, found it not great, turned it off. Fast forward 6-years, thought I'd try it again, and same deal -- back to off.

Sorry no help to your original question OP, other than mine is disabled because I don't like it.

[dazzles]

I am fixing this for two reasons:
I am very OCD with my vehicles, and i like everything to work, whether or not I use it. To make matters worse, i've always loved BMW's and that's basically the perfect and worst OCD vehicle, anytime there is any potential issue, you get lights and errors everywhere.
The other, more sensible reason I want this fixed, is because my blind spot sensor will also not work (i presume because there is a vibration in the steering wheel when there is danger??)
I erased all codes, turned off lane assist, and turned on blind spot monitoring, went for a drive, and as soon as i tried turning into a vehicle with my blinkers on, I got the error that blind spot is malfunctioning.
The two errors codes I have now are:
48004A - SZL interface (steering wheel vibration) Signal Invalid
800A07 - Vibration motor in steering wheel faulty

I believe this strengthens my hypothesis that it's indeed this fella.

[dazzles]

Originally Posted by fe7565

Sensible decision. But I would also check to exclude any power/ground/wiring issues going to the vibration motor itself.

Should have done that before ordering the part, but, I suppose I'm going to be able to test this once the part gets here. Is there a simple way to test this? I don't believe there's always power going to the motor in the steering wheel? It likely only sends power when the ECU triggers the motor on?

[fe7565]

Originally Posted by dazzles

Should have done that before ordering the part, but, I suppose I'm going to be able to test this once the part gets here. Is there a simple way to test this? I don't believe there's always power going to the motor in the steering wheel? It likely only sends power when the ECU triggers the motor on?

I would need to look up the ISTA+ wiring diagrams, but since you already have the part coming in, easier just to replace it and see if that solves it. If not, then you can start looking at the wiring.

[dazzles]

Posting a final edit for anyone who may have this issue in the future.
The issue was the Steering Vibration Generator part no: 32337849416
Be careful, because depending on what steering wheel you have, there are two types of steering vibration generators that will fit your car.
32337849416 - for MSPORT steering wheel aka the skinny boy
32336787451 - for SPORT steering wheels aka the thick boy

Good luck to everyone and thanks for your attempt to help.
Adieu

[fe7565]

Originally Posted by dazzles

Posting a final edit for anyone who may have this issue in the future.
The issue was the Steering Vibration Generator part no: 32337849416
Be careful, because depending on what steering wheel you have, there are two types of steering vibration generators that will fit your car.
32337849416 - for MSPORT steering wheel aka the skinny boy
32336787451 - for SPORT steering wheels aka the thick boy

Good luck to everyone and thanks for your attempt to help.
Adieu

Thank you for the update! Glad you resolved it.

[dazzles]

Originally Posted by fe7565

I am in the process of adding lane change warning and I don't care for the vibrator (or the heater) either, but unless you are certain and you can confirm, I do not think that the lane change system would work without the steering wheel module that is designed for the heater. My car has neither a heater nor a vibrator nor electric seats, so I had to get a steering wheel module that already came with the vibrator and harness (for $80 total on Ebay). I am not retrofitting the steering wheel heater function, because I never used that even in Canada, but needed the module so the proper LIN signals are passed to/from the FEM. Unless, someone can confirm that for the lane change warning the LIN will work properly with my factory non-heating steering and non-electric seat steering wheel module.

I am not 100% sure, but i'm fairly confident that you cannot get the lane assist or blind spot to work without the vibration mechanism. For me, both were disabled due to a faulty vibrating mech. It would not even allow the BSM on my mirrors to work, fantastic decision by BMW to disable everything because steering wheel can't go BRR.

[fe7565]

Thank you. Will see... I think I have all the parts.

[Wires]

Originally Posted by dazzles

THIS HAS BEEN RESOLVED/FIXED SEE COMMENTS FOR HELP

You have to be almost the first person that circled back, changed the first post (clearly) so people can actual see that there was solution! That is awesome, and thanks for letting everyone know.

[dazzles]

Originally Posted by Wires

You have to be almost the first person that circled back, changed the first post (clearly) so people can actual see that there was solution! That is awesome, and thanks for letting everyone know.

Ha, thank you, I just thought of others that might struggle with a needle in a haystack situation like I was The amount of times I've found my exact issue described somewhere on a forum for the OP to just vanish...

[seabassmty]

Originally Posted by dazzles

THIS HAS BEEN RESOLVED/FIXED SEE COMMENTS FOR HELP

Hello f30 fam,
Long time lurker, first time poster. This forum is honestly fantastic so I'm hoping someone can help me navigate through this issue i'm having.

Car: 2016 328d xdrive wagon (f31)

While driving, if I get the Lane departure to activate (by driving over a lane without blinkers on as an example) i will get an error on the dash saying the lane assist is malfucntioning.

The ISTA errors are:

48004 KAFAS interface (TLC ready for operation):signal invalid
48004A SZL interface *steering wheel vibration): Signal invalid
800A07 Vibration motor in steering wheel faulty

I am thinking it may be a faulty Steering Wheel Vibration Generator, but I am not sure why I would get a KAFAS and SZL code as well.

I also should note that I also have
800BE0 and 800BDB code because my side camera is currently being replaced (i ordered it, it stopped working) but i do not think these issues are related.

Also, my active blind spot monitor that will also malfunction, not sure if it happens during lane switches with lane departure, or independently. Not sure if this is related to either the camera missing, or the lane departure issue.

Your help is greatly appreciated!

Thanks, great post, how you figure out that the problem was only the vibration generator and not the module on the stearin wheel?

[dazzles]

Originally Posted by seabassmty

Thanks, great post, how you figure out that the problem was only the vibration generator and not the module on the stearin wheel?

Sorry, haven't been on in a while. I think it made perfect sense, the module would have likely caused the options to always be off (think my options worked unless i have triggered them in a way to get the vibration mechanism to engage, in which case it would turn off and display errors/ista codes