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Discussion Starter #1
HI all.

This is going to take a bit of explaining but ill keep it short and concise.

Model: 2011 - E90 - 320D - Base model. British.

Scenario & Problem:

Misses opened boot.
Didn't close properly.
I drove off.
Computer knows boot is open and signals warning on dash.
I think "Will be fine, home in 5 mins, will close then.
Boot fully closed en-route.
Computer/sensor still thinks its open.
Now will not engage electric switch to open boot because it thinks its "open".

To make things worse,
I get up this morning and i have a flat tire. Lock nut socket in boot!!.. No local tire repair stores have lock nut socket for my bmw.....!! My insurance also expired today :thumbup: ...Murphys Law....

My BMW does not have a key unlock for boot.
My BMW does not have a boot specific unlock button in cockpit.
My BMW does not have a central arm rest in rear seats that can be folded down.
My BMW does not have rear sets that fold down.

What iv'e tried.
locking and unlocking car + 1 million times in hopelessness.
Repeatedly clicking boot button on fob.
Replaced all fuses
Jump start only with positive connected via engine bay (Surge of electricity to pop lock? Maybe every electronic component in car causing an electrical fire which would be a blessing :rolleyes: ?)
Taken off boot unlock button (on boot) to see if i can get at locking mechanism. (Nothing in there but the wire.
Pared wire that connects to boot button and applied 1.5 volts to see if it would pop.
Use computer in dash to see if i could rest locking system.

I do not want to go into the fuze box and pair a specific wire and apply 12V to it. I have read this is an option but... No....

Questions:
Lets forget about the flat tire for a minute and get me into the boot.
Is there any way to reset the locking system myself?
Is there any way to reset the locking sensor for the boot?
Is there any way to access the boot in any manor without going to a specialist?
Why did bmw decide that the car will not need a key unlocking system for the boot? :mad:
Does anyone have any suggestions at all?
 

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Take the main fuse out that powers the vehicle for 30 mins then plug it back in. Should reset everything

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Discussion Starter #3
May be very well worth a shot.

Now to figure out which one it is. Diagram with car is, how should i say.... crap..
 

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Discussion Starter #5
Any idea which one it is? Looking at fuze box inside glove compartment, there doesn't seem to be the "main" fuze. Wondering if its located under the bonnet..
 

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Discussion Starter #10
Do you have a little access point from rear seat? If you do you should have a latch to pull and open

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Nope... that would be the easy way...

Also tried to go though the top via speakers. May be an option if all others exhausted but will have to cut through
 

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You can also disconnect Central locking fuse. Once you disconnect power vehicle on and off whilst fuse it out.

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This particular model has neither.

*Sharpening the hack saw*
Then you have to access behind glove box to manually send power to the truck electric latch. This is your only hope. This method works provided you use correct cable. You have to know which cable to se0nd 12 volts0 to pop boot open

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The button on the kick panel doesn't work?
Try the switch in the glove box
This particular model has neither. *Sharpening the hack saw*
So HOW do you normally open the Boot? Is there a release button above the rear license plate? WHAT do you press or squeeze to open the boot?

The link below is the TIS Circuit Diagram for "Central Locking Inputs" for your 320d. It shows the Boot Locking Motor (M17a) and Boot Lid Button (S172a) in the middle of the long diagram. BOTH connect to the JBE (Junction Box Electronic Module) A4010a:
https://www.newtis.info/tisv2/a/en/e90-320d-lim/wiring-functional-info/body/locking-security-functions/central-locking-system/inputs/g1pN2ri

As for "Central Locking Outputs", see this TIS Circuit diagram which shows how the JBE operates the lock/latch function of M17a:
https://www.newtis.info/tisv2/a/en/e90-320d-lim/wiring-functional-info/body/locking-security-functions/central-locking-system/outlputs/i4nGkoU

So, you should be able to apply 12V+ with a jumper wire or patch cord to pin #12 (Grey/Green wire) of Connector x14270 at the JBE. Here is the "Installation Location" of X14270:
https://www.newtis.info/tisv2/a/en/e90-320d-lim/SDqXurS

Think of this as an "opportunity" to get to know your 320d :)

George
 

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Discussion Starter #18
Release button above licence plate or fob.

Thank you for the diagrams. I have stripped back the glove box area. Located pin 12 which collated with a gray/green wire. I have paired back to expose the copper wire. Tomorrow i will apply the 12v.

Thank you for all the help. Will post an update.
 

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Don't know if brit versions have them but US cars have an emergency trunk release handle that should be visible. So kids don't get locked in.

I don't know if this is a physical or electronic release. Never actually used it (don't spend much time in the trunk with the lid closed, I guess...).

If there, you might be able to hook it through the speaker hole to release the trunk.

BTW, have you called your local dealer service and asked them how they release a frozen boot lid? Can't be the first time they've seen it.

Good luck.
 
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