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-   D3 - Common Faults (https://forum.a8parts.co.uk/forumdisplay.php?f=67)
-   -   Lost soft close on boot (https://forum.a8parts.co.uk/showthread.php?t=9727)

mattylondon 22nd March 2015 05:12 PM

Lost soft close on boot
 
As per title, the soft close doesn't work anymore no matter how many times I lock / unlock the car and open / shut the boot. It just doesn't do the gentle pull down anymore.

I am having battery issues at the moment, (I get the Energy management Battery level warning) so don't know if this is related.

Delboy 22nd March 2015 05:59 PM

Does the soft close work on the other doors?
 
There's a few things that won't work when battery manager starts cutting consumers.

I know from my experiences that the comfort access is one of them.

If you battery is fully charged then just change the last digit on the serial number to fool the manager into thinking its a new battery.

It should then at least start working again if it was just indeed an issue with the battery manager

mattylondon 22nd March 2015 07:11 PM

Only my boot is soft close.

The issues happened Saturday morning, started the '8 up and MMI didn't work - no screen no music no warnings.

About 2 mins later the MMI screen moved up and the radio came on, but there was an audible pop coming from the speakers then a click from a relay in the boot. The MMI screen started blanking and resetting once every two mins or so.... Just what I needed on a busy weekend!

I did what I had to do then parked up, engine off, and got VCDS. Battery now was at 40% and the clicking was still going (probably the Bose DSP switching on / off and draining the battery)

http://i.imgur.com/TVb7Ip9.jpg

At this stage I couldn't access any of the modules on the MOST loop in VCDS and the MMI would not work in the car, either the Bose DSP is faulting or the energy management has turned it off.

I was worried I'd get a flat battery so drove the car to parents driveway where I started to investigate the MOST modules, as I thought that was the issue. I removed the Bose DSP from the loop and all was ok, no relay clicking & MMI behaved normal now just without sound. Added it back into the MOST loop and no MMI problems, sound is normal no audible pop.

Scratch my head a bit and deduce it's probably a battery issue, which is where I had to leave the problem for now. I'll get a charger on the battery tomorrow evening and take it from there. Hopefully will get the soft close boot back +++

ainarssems 22nd March 2015 08:24 PM

Looking at your battery voltage on screenshot of VCDS it is empty. Empty battery voltage varies a bit depending on source of information and battery type, make but generally accepted empty voltage is 11.9V for flooded lead acid battery. As yours is showing 11.65V consider it fully discharged. You can probably still start car with that voltage but the battery is working on reserve capacity and it is deteriorating considerably at that low stage of charge. Fully charged battery should have resting voltage around 12.6V

Edit:

By the way I think 40% is battery condition not charge level. So fully charged battery has 40% of original fully charged capacity/CCA left not that it is 40% charged at the moment. Normally I would say you need to replace battery when it gets to 50% health for summer use or 60% for winter use.

snapdragon 22nd March 2015 08:37 PM

Do you think it is an electronic problem or could it be a coincidence that the spring has snapped? There is a spring similar to one in a biro pen and the hook on one end snaps off with fret wear - meaning the mechanism above the bumper (not in the boot the lid) doesn't work anymore. It is a common problem. there is a thread with photos somewhere.

mattylondon 23rd March 2015 09:20 AM

Quote:

Originally Posted by snapdragon (Post 91119)
Do you think it is an electronic problem or could it be a coincidence that the spring has snapped? There is a spring similar to one in a biro pen and the hook on one end snaps off with fret wear - meaning the mechanism above the bumper (not in the boot the lid) doesn't work anymore. It is a common problem. there is a thread with photos somewhere.

Thanks Snap, very useful indeed. I shall take a look at it and try to find that thread +++

jza8 23rd March 2015 06:18 PM

Quote:

Originally Posted by snapdragon (Post 91119)
Do you think it is an electronic problem or could it be a coincidence that the spring has snapped? There is a spring similar to one in a biro pen and the hook on one end snaps off with fret wear - meaning the mechanism above the bumper (not in the boot the lid) doesn't work anymore. It is a common problem. there is a thread with photos somewhere.

Yes very common issue. Same spring snapped on mine, but i found it behind the trim and made a new loop at the end and fitted back no problems since.

mattylondon 27th March 2015 05:56 PM

Had the afternoon to tinker with the '8 and sorted the battery. Soft close on the boot started working once again so can only assume it was an energy management issue. +++

47p2 29th March 2015 09:07 AM

Must be the time of year. My soft close did this a couple of years ago and cleared itself and has been working fine since until this morning when it decided to not pull the boot lid down which meant I had to drive about with it 'half cocked' so to speak. Then after a few times opened and closed it was all working again. I'm now going out to investigate



Just back in after having a look at this, not really sure what happened this morning but as it is all working now it's impossible to trace a fault or find the cause. I stripped out the trim, and everything on the locking mechanism looked to be in place, no broken spring and all moving as it should. I cleaned the sliding parts and applied some light grease, not much more I can do at the moment...Just have to wait and see

mattylondon 29th March 2015 12:14 PM

Quote:

Originally Posted by 47p2 (Post 91456)
Just back in after having a look at this, not really sure what happened this morning but as it is all working now it's impossible to trace a fault or find the cause. I stripped out the trim, and everything on the locking mechanism looked to be in place, no broken spring and all moving as it should. I cleaned the sliding parts and applied some light grease, not much more I can do at the moment...Just have to wait and see

Exactly the same as me. Glad yours has started working once again +++

tc4332 29th March 2015 03:13 PM

I am 75 years young and learnt to drive at 12 (yes twelve years old) on a three ton Bedford bread van. I had to drive it 'cos the real driver had me fasten him in the back with a shop assistant who we were allegedly giving a lift home to. They were a bit redfaced as I remember it when I let them out near her home :Confused:
Anyway, back to topic, with all my motoring experience when driving the 8 I think it is wonderful and fault free. Then I make the mistake of plugging the VCDS in. The Ross-Tech super gizmo breaks my faith in all things mechanical, it tells me I am driving a box of rocks that is about to burst into a self destruct cycle of flames and mayhem. :(
OK, says I, stop worrying about it all, if it breaks fix it, otherwise just enjoy the pleasure that an A8 gives me. Turn up the Bose and drown out SWMBO and the grandkids. I love it.

47p2 29th March 2015 03:57 PM

Used it another 6 times today and all working as it should

mannyo 22nd April 2015 07:19 PM

My boot has not closed properly since I got the car, had a look last weekend and you can feel where the spring is meant to be and there is nothing there. So mine does not close properly because the spring has also snapped.

jza8 22nd April 2015 07:28 PM

Have a look if you can find the spring behind the trim somewhere. I found mine laying behind the trim, made a new loop at the end and fitted it back +++

47p2 7th December 2015 06:38 PM

Well it seems all was not well with my boot soft close again as it decided to not pull down when closed. After a bit of a poke around there seems to be 3 components to this system.
1. The latch on the lid
2. The pin mechanism on the floor
3. The drive motor somewhere in the battery compartment

My symptoms were the boot went down the latch flipped over the pin but the lid would not pull tightly closed.

Trying to find the fault is a major pain in the butt, what with 3 components to deal with and nothing responding. The latch would open when pressing the remote fob button, the interior boot latch button and the boot lid button. When I had the lid open I tried flicking over the latch to see if it would engage the pull down pin mechanism but nothing happened so this led me to believe the latch was faulty. It must have a microswitch inside to send a signal to the motor but without removing it for inspection I was at a loss. So plan B was to hit the latch with a screwdriver handle a few times and low and behold it worked. It's now dowsed in some WD40 and been operated a dozen or so times and all seems to be working again


Does anyone have the instructions for removing the latch?

paulrstaylor 7th December 2015 07:16 PM

Quote:

Originally Posted by 47p2 (Post 103443)
2. The pin mechanism on the floor
3. The drive motor somewhere in the battery compartment

These are actually the same part, £ to a penny this is the issue. Plastic gears in the motor will be stripped, new on was not that pricey from memory. Fitted under the battery, cable routed under the plastic trim to the latch, easy to change +++

Found a new one on ebay http://www.ebay.co.uk/itm/Audi-A8-D3...-/111782026395

Architex_mA8tey 7th December 2015 09:28 PM

Quote:

Originally Posted by 47p2 (Post 103443)
Well it seems all was not well with my boot soft close again as it decided to not pull down when closed. After a bit of a poke around there seems to be 3 components to this system.
1. The latch on the lid
2. The pin mechanism on the floor
3. The drive motor somewhere in the battery compartment

My symptoms were the boot went down the latch flipped over the pin but the lid would not pull tightly closed.

Does anyone have the instructions for removing the latch?

Try page 30 of this document -
http://forum.a8parts.co.uk/attachmen...8&d=1420367585

47p2 7th December 2015 10:13 PM

Thanks, page 27 I needed for the latch removal.

47p2 8th December 2015 12:47 PM

All seems to be working perfectly today +++


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