[toby_2028]

Hi guys and girls - I have problems clearing code 9CBA…

Car:
4/2011 BMW E90 320d aut. M-Sport.

I will start from the beginning.
I had a problem with the door handle in the drivers door. I took apart the door and fixed the problem. A day or two after I notice that I could not open any windows or lock the doors, from the master switch. Anything else, switch light and mirrors adjust, worked fine. I took apart the door again to troubleshoot and found that a screw from the door panel had gone right throw two wires - Red/Gray and Brown had bin shorted out right under the switch plug (See pic: https://ibb.co/jkGyX7). I fixed the bad wires, but could not clear code 9CBA, and the master switch did still not work. I troubleshooted everything and there is no broken og shorted out wires left in the door.

Well, the only thing it could be, was the master switch itself or the FRM module (See pic: https://ibb.co/cByZ5S). I borrowed a master switch from a 320d 2009 and 2010 (Switch looks the same, but partnumber do not match), but still no changes. The master switch from my car, worked fine in both cars I borrowed the switches from.
Well I went online and ordered a preeowened precoded FRM module from Ebay. I switched out the module, but still no changes. – Can’t clear the codes.

I am lost… If I connect the computer and do a self-test on the windows, all the windows goes up and down perfectly. All the other windows switches work perfectly, but the master switch does not.
I Googled my ass off, and the only thing I can find is a forum thread, where the Answer is “Pay to read” (See pic: https://ibb.co/ih0gkS)
Can anyone help me?? I am a former auto mechanic and know my way around a car, but this is to much for my little brain. :-)
I have a complete set of IMPA, Tool32 etc., but have little to no experience using that software.

Please help me.. :-)

[Levanime]

did u check LIN wire continuity form master switch to frm?
what was resistance?

[toby_2028]

Originally Posted by Levanime

did u check LIN wire continuity form master switch to frm?
what was resistance?

I checked the Red/Gray and the White/Brown wire and it is OK. I pulled off the plug at the A-pillar and checked the connection from the door plug to the master switch plug. The resistance was acceptable but can't remember the exact ohm.

I haven't checked the LIN wire from A-pillar to FRM, but it’s unlikely the error will be there, as I haven’t touched the part.
I was hoping for a coding issue or a reset of some kind.

Based on my troubleshooting, do you think the error will be between the A-pillar plug and the FRM?

[icon2015]

Hi there,

You can check fuse: F66, 7.5A; F41, 30A; F81, 30A. Behind your glove compartment. Use your original FRM.




Also try to initialize the power windows with ista-d/rheingold.

[Pierre26]

Clearing error code: you can do it using INPA.
Re-initialization can be done without ISTA, this way:
Press the window 'open' switch beyond the second switching position. When the window has reached the lower final position, operate the switch for at least 15 seconds but not longer than 25 seconds.
Then let go of the button and immediately pull the switch beyond the 'close window' position. Do not let go of the switch!
The window now moves into the top final position, stops, then moves to the lower final position, stops again and then moves back to the upper final position. The switch must be held in the "pulled beyond engaging point" position during the entire procedure.
Once the window has reached the upper final position, the initialisation is complete.
Important!
It must be ensured that there is on-board supply voltage of at least 12 V during initialisation, otherwise initialisation of the power window is not possible.
The anti-trapping protection has no function during the entire initialization procedure.
Emergency operation
If there is no valid characteristic curve, the one-touch closing function is unavailable. If there is no standardization, the Automatic Open function is also disabled. In this case, the window only moves around 2 cm in the desired direction with each press of the button

[toby_2028]

Originally Posted by icon2015

Hi there,

You can check fuse: F66, 7.5A; F41, 30A; F81, 30A. Behind your glove compartment. Use your original FRM.




Also try to initialize the power windows with ista-d/rheingold.

I love you man. So simple.
Thank you so much..

[FaceDeAce]

Ddi the fuse fix your problem?
I finally found the issue on this one here. Wow was it ever a needle in a haystack type to find.

https://www.e90post.com/forums/showt...1#post27696701