[rs13_sr20det]

Hello everyone,

Im having issues with NBT retrofit on my 335I F30 2012. The car has currently entry level HU, I’m trying to retrofit NBT with navigation (none EVO). From my understanding this should be a plug and play installation, used the standard quadlock cable from the harness to the unit. Now to the issue, the NBT won’t come on after installation. Screen is black and no response from HU.

Anyone has an idea on what I’m missing here?

[schernov]

You are not getting power.
Check fuses. And check quad lock pin outs. Could be different.

[rs13_sr20det]

Checked fuses, all looks good. We even tried to reconnect the OEM HU and it works fine. Could be the different connection point on the quadlock. We are thinking maybe we need NBT emulator with harness to get it working?

[toxik]

doesn’t the headunit need to be coded to your vin?

[fe7565]

In some models like mine, when I went from CIC-High to NBT, the LVDS 4+2 cable pins are 180 degrees. So not only the power and ground wires are rotated, but also the LVDS 4-pin video signals.

https://f30.bimmerpost.com/forums/sh...&postcount=493

https://f30.bimmerpost.com/forums/sh...43&postcount=4

[rs13_sr20det]

Originally Posted by toxik

doesn’t the headunit need to be coded to your vin?

The issue here is that the screen is dead, there is probably no power / signal to the NBT. I’ve seen cases where the user has “no signal” message showing on the screen when done retrofitting, that needs CAF vid E-sys.

[rs13_sr20det]

Originally Posted by fe7565

In some models like mine, when I went from CIC-High to NBT, the LVDS 4+2 cable pins are 180 degrees. So not only the power and ground wires are rotated, but also the LVDS 4-pin video signals.

https://f30.bimmerpost.com/forums/sh...&postcount=493

https://f30.bimmerpost.com/forums/sh...43&postcount=4

I checked though the links, great reviewe I must say 😊

I purchased a retrofit cable set with CID cable, fitting is 180 degrees to the OEM cable. Do you suggest we need to rotate the cable 180 degrees from current configuration?

Below is the conversion bought off eBay

https://www.ebay.com/itm/39484633764...mis&media=COPY

Attached picture below showing the screen connection to NBT as we have it setup today which doesn’t seem to work.

[fe7565]

If you have both types of cables (180 vs non 180) then worth to try. Also, as said above, if you do not have a “No Signal” on your CID then it’s not even getting power. Check the two wires on the 4+2 plug that supply power and make sure the power wire has volts and vice versa.

You can also shear off the pegs in a bind to rotate the plug (not the socket) if it does not fit in the plug . It will still stay in secure. I would not mess with opening up the LVDS cable insulation or shielding, or you could severely impact the video signal.

[rs13_sr20det]

You were spot on, thank you! I cut the OEM CID and mounted it 180 degrees, the screen popped up. Now to the next challenge, the Idrive unit is not responding. Do you know if it’s possible to code it with E-sys or do I have to get the emulator harness?

[rs13_sr20det]

For future reference no emulator is needed for the Idrive to work if one don’t bother with the touch function, same applies to extra harness. Follow the guide below to get the Idrive unit working.

https://f30.bimmerpost.com/forums/sh....php?t=1954742

[fe7565]

Originally Posted by rs13_sr20det

You were spot on, thank you! I cut the OEM CID and mounted it 180 degrees, the screen popped up. Now to the next challenge, the Idrive unit is not responding. Do you know if it’s possible to code it with E-sys or do I have to get the emulator harness?

Glad it worked!

[ADHD]

Going to bump this thread.. Gunna read more on the links posted...

Completed a HU CIC to HU NBT Retrofit on a 13 F30. Took a min to get the Dead black screen to life.. I cut the end of the Oem cable and Rotated it 180 deg. guess i got lucky replugging the power back in cause it came up right away.. Solved the issue..

NOw im went to install the MMI and need to run the LVDS Direct from HU to the MMI. I Took it all apart and didnt mark the OEm position on the power and Had no power no signal for a few hours. I actually backtracked back to stock (Coding and all) thinking the whole cable was shot...Found out the issue was the power was backwards too.
There has got to be a way to decifer the difference of the 180 cable on ebay?
Or why does it even exist if we upgraded to the newer nbt? Trying to wrap my head around that part.. Is it just the screen thats twisting the connection?

[ADHD]

Looks like this cable is Modifiable.. ONly cable i see to make this work correctly.
https://www.ebay.com/itm/16625457055....c101506.m1851

I actually received one these cable with the MMI kit and modified it correctly.. I just need another one now and i should have the mmi working as well...