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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > AUDIO/VIDEO + BLUETOOTH + Electronics/Alarm/Software > USB Socket in Armrest intermittent



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      03-04-2020, 03:58 AM   #1
Jakg
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USB Socket in Armrest intermittent

I've got a 2008 E91 335d with a retrofitted CIC system.

The USB socket in the armrest hasn't worked since I got the car, although it briefly worked this morning (iPhone started charging, message popped up on the display about the device with it's name and the iPhone suggested downloading an app) but haven't had it work since.

Any ideas?
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      03-29-2020, 05:02 PM   #2
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Bump?
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      03-29-2020, 05:39 PM   #3
ctuna
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USB comes from the Mulf 2 Hi or combox module in the
trunk. In some cars there is an usb Hub in between the
Mulf and the USB Socket.

If you change the Head Unit you usually need to program
the new one to the options installed.

The 6FL USB option must be programmed in for usb to work.
In a 2008 equipped with usb it's likely it came with the Mulf 2 hi
module underneath the TCU module.
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      03-29-2020, 06:31 PM   #4
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It did work temporarily the other day - so I think itís unlikely to be a coding issue if itís intermittent?
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      03-29-2020, 10:31 PM   #5
ctuna
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NO software is not intermittent hardware can be.
Bad connection or failing component is most likely
if your battery is good.

Last edited by ctuna; 03-29-2020 at 10:40 PM..
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      04-05-2020, 12:09 PM   #6
Jakg
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Quote:
Originally Posted by ctuna View Post
USB comes from the Mulf 2 Hi or combox module in the
trunk. In some cars there is an usb Hub in between the
Mulf and the USB Socket.

If you change the Head Unit you usually need to program
the new one to the options installed.

The 6FL USB option must be programmed in for usb to work.
In a 2008 equipped with usb it's likely it came with the Mulf 2 hi
module underneath the TCU module.
Had a look in the boot.

Looks like I have a combox - although as mentioned it's retrofitted and not standard as you can tell from the wiring.
There are quite a few unplugged connections.



I also noticed that the AUX input doesn't work either?

I popped the socket out in the armrest so I guess the next thing is to check the wiring to see if it's actually connected to anything?
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      05-09-2020, 05:40 PM   #7
Jakg
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I've checked the fuse and this is ok.
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      05-17-2020, 08:52 AM   #8
Jakg
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I can see that INPA shows the "TEL/MULF" / "CMEDIAR" module has a fault code of "A8F9" which Google seems to suggest is something to do with a reset.



Unfortunately, I can't see the module listed in INPA to scan further?







I'm assuming that querying all modules searches the car whereas the dropdown list comes from what the car should have - I'm guessing?
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