[Android Head-Units] djkostt:
BMW 320d E90 '06

Hi ,

I am an Auto Electritian i have nearly 15 years experience my last job before this Lockdown was for Mallaghans Engineer and i was actually dealing with this type of faults on the buses for Ryanair .

I bought an Xtrons PB7890BP 3 days ago and i just had the installation done ... My car had the BMW Professional (not Logic 7) , i installed everything that came with the head unit and all seems to work apart from what everyone else here is talking about which is the CANBUS and my Key Fob stopped working so i have no open close with the key fob , checked fuses for actuator etc with no luck , also i would like to tell you guys that fuse number 2 is empty and is permanent live +12v and this is where i have yellow wire connect on the fuse box and i have the memory for radio stations and clock all working without a problem , l now that everybody here talks about the canbus having a bug but i installed Carly on the head unit and had a healthy scan done with the head unit to the bmw and i got 3 faults one of them is a common fault 00A6D1 Junction Box Passenger Module which is related to the additional water pump and the other 2 faults are , 00D810 CD Changer and 00ABEA and both are related to the error ring diagnosis , which by my understanding and when they say ring diagnosis they mean the fiber optic that is located on the Quadlock loom connected to the OEM BMW Proffessional and when we are removing the OEM Headunit we are actually breaking the network ring and when our CANBUS tries to send data over the ring because we do not have our OEM Head Unit inserted ... There is a solution to fix the ring which is a Fiber Optic Loop connector what this actually does is close the ring and than complete the data transfer and can be purchased between £4 and £10 or you can create your own if you are good with your hands , i wonder if this was ever tried by someone here due to our BMW Professional act as a board computer i think this is why most of the information that needs to travel on the ring through CANBUS is not showing up on our Xtrons i could be wrong but i wont be able to try until i receive Fiber Optic Loom Connector that i bought today .

Could please someone tell me if this ever tried before ? I seen someone was offered by Abby here a Fiber Optic but not sure if it was the loop connector that is being sold on the xtrons website or if it was the Audio converter (£99) ... Maybe what Abby meant was actually this fiber optic loop connector ?

UPDATE : To all having problems with this unit the problem as many said is in the CANBUS , we all know that the long yellow wire is connected to the +12v in the battery probe (permant live) or some preffer and go the easy was connect to fuse #2 on the fuse board i have used the multimeter to test it and with car turned off is getting +12v , so the main problem starts here and why many also have the battery drainage problem ... Let's now move to the CANBUS decoder itself and the plug that connects to to the decoder , as you all know the e90 does not have the red wire (ACC switch live) in the quadlock plug , instead the (red) acc switch live comes from the back of the headunit straight to the CANBUS decoder and the when you start the car eventually was supposed to turn on the CANBUS decoder and canbus would send a signal and turn the radio on/off but if you all noticed that long yellow wire (permanent live) that is connected to +12v in the battery to keep radio stations memorised , clock etc , this is spliced to the quadlock and spliced to the back of headunit and to the CANBUS decoder which means you are also putting +12v to the CANBUS decoder reason why is messing up with it is almost like the red acc wire is doing nothing there and why many here said that CANBUS takes along time to turn off when car is off but in fact it does not turn off at all reason why many change the settings to 30 seconds awake but the fix for this is simple ....

Just go on the CANBUS decoder the 0.75mm yellow wire cut it , now remove the cover that holds your ashtray and in your cigarret lighter plug the middle pin is 12v switched splice a wire in the middle pin long enough to bring it to the CANBUS decoder now the +12v wire that we have just cut grab the one in the CAN decoder end and connect to this wire that you just spliced in the cigarret lighter and the other end on the radio side just isolate we will not need this end any longer (maybe in the future can be used somewhere else) . Now with all said if you turn your car your radio will turn on if you put a multimeter and test it you will be getting 12v in both red wire and yellow wire in CANBUS decoder and if you turn off your car and remove your key fob you wont get 12v anymore which is what we are looking for this way you are sure your can is off and you are not getting 12v permant when yiu remove the key draining your battery and in terms of clock and radio stations there is nothing to worry about now because it will keep them all in memory because you connected the long yellow wire to the +12v probe in the battery or fuse#2 , i have my e90 running now for 4 days and never had a problem seemed to fix most problems ... Hope this can help most of you guys with the same issues .