Rear deck not locking down.

Digger72x · September 11, 2022

The rear deck lid will apparently not fully lock down causing a "trunk open" display on the dash and will not allow opening the convertible top. It is partially locked (as I can't pull it open) but it has a visible crack but doesn't come fully open unless the "open" button is pressed on either the front panel or the key fob. Please help

Greydog · September 12, 2022

Morning Glyn

If it isn't adjustment of the "Trunk" lid or something in the way, then the lock needs inspection or changing.

Dave

Digger72x · September 13, 2022

Thank you Greydog I have come to the same conclusion, if it's not a programming function. It seems before the problem occurred the trunk would close when I pushed it closed and then something would pull it further down into a locked position. I don't see that second movement now. I am going to order another locking mechanism.

Digger72x · September 13, 2022

When they say "soft lock" in deck lid locking mechanism does it mean the secondary locking that occurs after the deck lid first attaches to the locking procedure?

Greydog · September 13, 2022

Spot on Glyn

The lock engages then the second action pulls the lock into the fully closed position. I your case there are several other sensors that look for the "closed" signal so things can't operate properly

I guess you tried good old WD40 😂

Dave

Digger72x · September 13, 2022

Didn't try wd-40 because my experience with BMW is zero. Any info on sensors location? I am a firm believer of wd40. I have the lock exposed so will try spraying first and if that doesn't work then will remove and be more thorough with the wd40. Thanks again Dave for the help.

Greydog · September 14, 2022

It may be a BMW and even though they (like many other Manufactures) try to convince us that "Only they can fix it" under neath it is just a car, complicated in places but just a car.

If you are not aware take a look at www.realoem.com it's a BMW Online Parts List, just put the last 7 digits of your Vin into the search box and it will bring up your Model. Then search the sections for what you need. There are small, exploded Drawings that will help see where stuff fits and the part numbers double click a part number, and it will show any other models the part was used on plus and alternative part numbers.

I hope the "chemical spray spanner" does the trick

Dave

Digger72x · September 14, 2022

10 hours ago, Greydog said:

It may be a BMW and even though they (like many other Manufactures) try to convince us that "Only they can fix it" under neath it is just a car, complicated in places but just a car.

If you are not aware take a look at www.realoem.com it's a BMW Online Parts List, just put the last 7 digits of your Vin into the search box and it will bring up your Model. Then search the sections for what you need. There are small, exploded Drawings that will help see where stuff fits and the part numbers double click a part number, and it will show any other models the part was used on plus and alternative part numbers.

I hope the "chemical spray spanner" does the trick

Dave

Digger72x · September 14, 2022

I will give it a try. One more question, what should my oil temperature be? I am running about 240 degrees but no alarms. Thanks Dave.

Greydog · September 15, 2022

Morning Glyn

240f (115c) seems very hot what is the gauge reading? I believe the car should run at around 90c (200f or lower) High engine temperature will also have an effect on other components such as Gearbox particularly if its auto

I would start by checking the cooling system, Rad vanes all clear and water flowing well. No hoses kinked or pinched, Water pump in good order Thermostat working correctly (I change mine to a lower 80c rating) Check the temperature senders there are 2 one on the Thermostat housing and one at the lower hose outlet (check realoem) Check the electric cooling fan is working correctly.

I use an Infrared thermometer to check temps at the Thermostat housing I also check the transmission oil sump and engine oil sump, If you have an Automatic transmission fluid is better around 80c which is why I fit lower temp thermostats to help protect the box (my theory anyway)

Dave

Digger72x · September 15, 2022

13 hours ago, Greydog said:

Morning Glyn

240f (115c) seems very hot what is the gauge reading? I believe the car should run at around 90c (200f or lower) High engine temperature will also have an effect on other components such as Gearbox particularly if its auto

I would start by checking the cooling system, Rad vanes all clear and water flowing well. No hoses kinked or pinched, Water pump in good order Thermostat working correctly (I change mine to a lower 80c rating) Check the temperature senders there are 2 one on the Thermostat housing and one at the lower hose outlet (check realoem) Check the electric cooling fan is working correctly.

I use an Infrared thermometer to check temps at the Thermostat housing I also check the transmission oil sump and engine oil sump, If you have an Automatic transmission fluid is better around 80c which is why I fit lower temp thermostats to help protect the box (my theory anyway)

Dave

Thanks for the info Dave. I will tackle this problem after I finish the deck lid lock issue. I tried to download something on "realoem but my computer got locked up by a scammer. Got it cleared. Don't think I will try realoem again.

Greydog · September 16, 2022

Morning Glyn

You don't have to download www,realoem.com you use it online? Just google it, enter the site and use it if you want to print information just right click and save it as a PDF. Stay clear of all the "Adds" and other rubbish that Google let in though.

Good Luck

Dave

Digger72x · September 21, 2022

On 9/14/2022 at 3:24 AM, Greydog said:

It may be a BMW and even though they (like many other Manufactures) try to convince us that "Only they can fix it" under neath it is just a car, complicated in places but just a car.

If you are not aware take a look at www.realoem.com it's a BMW Online Parts List, just put the last 7 digits of your Vin into the search box and it will bring up your Model. Then search the sections for what you need. There are small, exploded Drawings that will help see where stuff fits and the part numbers double click a part number, and it will show any other models the part was used on plus and alternative part numbers.

I hope the "chemical spray spanner" does the trick

Dave

The wd40 didn't work. I did manage to see the "soft lock function" work a couple times but was not successful to determine what caused it to happen. There are two motors on the assembly that obviously control the function. I was unable to disconnect the plug to either one. Couldn't determine what the locking function was and whether it required a special bmw tool. Wish I had wiring diagram of the lock assy including the two plugs for the motors. Can't imagine why the engineers used two motors to perform an identical operation on the same assy

Greydog · September 21, 2022

Morning Glyn

Why make life easy for folks like us 🤣 BMW are not the only manufacturer who do crazy stuff.

As I understand, one motor is Central Locking the other is Soft Close as you have managed to coax them into life try checking the earth connections BMW also like to use earth triggers. The soft close motor will have a fully closed contact that signals the system control for things like Hard Top operation or central locking.

If your car has the Comfort access package there was a function for "convenient loading" where the roof goes partially up so the trunk lid can open to allow loading. From what I have read that seems to be behind some of these issues.

Normally BMW connectors have a thumb/finger release on one side often just press and pull

Dave

Digger72x · September 22, 2022

14 hours ago, Greydog said:

Morning Glyn

Why make life easy for folks like us 🤣 BMW are not the only manufacturer who do crazy stuff.

As I understand, one motor is Central Locking the other is Soft Close as you have managed to coax them into life try checking the earth connections BMW also like to use earth triggers. The soft close motor will have a fully closed contact that signals the system control for things like Hard Top operation or central locking.

If your car has the Comfort access package there was a function for "convenient loading" where the roof goes partially up so the trunk lid can open to allow loading. From what I have read that seems to be behind some of these issues.

Normally BMW connectors have a thumb/finger release on one side often just press and pull

Dave

Thanks Dave, Interesting info and something else to check on. I looked for a connector release but couldn't see any. Also had the assy completely unbolted from the deck lid so any ground (earth trigger) connection except possibly in the harness itself which a wiring diagram, if I could get a diagram, would identify. I have a bid in Ebay for a used lock assembly. If I get it I believe it will make troubleshooting easier.

Greydog · September 22, 2022

Brown is BMW's choice for Earth colour somewhere in the back of the Boot (Trunk) behind a trim will be a common earth point (like a comb) it needs unbolting cleaning and remounting preferably with an electrical contact paste to ensure a good earth is made may help cure the issue. BMW has an Online TIS (technical information system) which like Realoem was free. In their wisdom (and probably to frustrate guys like us) they made the decision to make it subscription only!!

INPA/ISTA have WIS (Workshop Information) and TIS in the program but my old Garage laptop with all my diagnostic programs loaded the screen has died (it is 20 years old) if I can get it up and running, I will see if I can print off some stuff for you.

Attached is a pdf of the boot locking mechanism and its parts the parts key is below

No.	Description	Supp.	Qty	From	Part Number	Price	Notes
	WITHOUT Lock cylinder TRUNK LID
01	Trunk lid lock		1	07/2009	51247353615
02	Bowden cable, emergency unlocking		1	07/2009	51247201608	$13.30
	For vehicles with Emergency release, luggage compartment	S5DSA=Yes
03	Handle f emergency unlocking		1		51247056414	$7.25	EBA 0141456
04	Clip		1		51247056413	$1.69
05	Washer		1		51247057739	$1.26
06	Boot lid/tailgate pushbutton		1		51247118158	$29.40	+core
07	Catch with key		1		51247199828
07	Catch with code		1		51247199829	$130.68
08	Lock cover		1		51247130828	$1.18
09	Torx-bolt with washer	ISA M6X17	2		07147139404	$0.80
10	Catch bracket left		1		51247159611	$15.68
10	Catch bracket right		1		51247159612	$15.68
11	Base		2		51247177487	$0.38
12	Torx-bolt with washer	ISA M6X17	4		07147139404	$0.80
13	Torx-bolt with washer	ISA M6X17	6		07147139404	$0.80

BMW E93 Boot Locking mechanism..pdf

Digger72x · September 22, 2022

10 hours ago, Greydog said:

Brown is BMW's choice for Earth colour somewhere in the back of the Boot (Trunk) behind a trim will be a common earth point (like a comb) it needs unbolting cleaning and remounting preferably with an electrical contact paste to ensure a good earth is made may help cure the issue. BMW has an Online TIS (technical information system) which like Realoem was free. In their wisdom (and probably to frustrate guys like us) they made the decision to make it subscription only!!

INPA/ISTA have WIS (Workshop Information) and TIS in the program but my old Garage laptop with all my diagnostic programs loaded the screen has died (it is 20 years old) if I can get it up and running, I will see if I can print off some stuff for you.

Attached is a pdf of the boot locking mechanism and its parts the parts key is below

No. Description Supp. Qty From Up To Part Number Price Notes

WITHOUT
Lock cylinder
TRUNK LID

01 Trunk lid lock 1 07/2009 51247353615

02 Bowden cable, emergency unlocking 1 07/2009 51247201608 $13.30

For vehicles with
Emergency release, luggage compartment
S5DSA=Yes

03 Handle f emergency unlocking 1 51247056414 $7.25 EBA 0141456

04 Clip 1 51247056413 $1.69

05 Washer 1 51247057739 $1.26

06 Boot lid/tailgate pushbutton 1 51247118158 $29.40 +core

07 Catch with key 1 51247199828

07 Catch with code 1 51247199829 $130.68

08 Lock cover 1 51247130828 $1.18

09 Torx-bolt with washer ISA M6X17 2 07147139404 $0.80

10 Catch bracket left 1 51247159611 $15.68

10 Catch bracket right 1 51247159612 $15.68

11 Base 2 51247177487 $0.38

12 Torx-bolt with washer ISA M6X17 4 07147139404 $0.80

13 Torx-bolt with washer ISA M6X17 6 07147139404 $0.80

BMW E93 Boot Locking mechanism..pdf 235.94 kB · 1 download

Thanks Dave, you certainly are a wealth of knowledge on BMW. I will look for the ground (earth) connection this weekend. I have the breakdown but even if I ordered a new one from the dealer at $985.00 it probably wouldn't fix my problem. After these discussions with you and the opportunity to see it work a couple times I fully believe it is something like the ground not very good or a bad connection in the wiring. It's just too bad with the media as broad as it is that BMW doesn't have more info on electrical systems available to us owners even on a purchase option. I can't even find a fuses function and location. Most other manufacturers do have them available.

Greydog · September 23, 2022

Sadly, BMW are not alone among manufacturers in trying to convince us we are all too Dumb and their control and wiring systems are far too complicated for us to understand so without the Dealer workshop our cars will never work again!!

Try this for the fuses still working on getting you Wiring and Pin out information

Fuse Boxes E93.docx