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D3 - Body and Exterior Bumpers, bonnets, glass, trims - Everything outside |
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#1
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Help with boot lock problems ...
I'd be grateful if someone could explain how the A8's boot lock works so I can try and diagnose a fault.
As of yesterday, when I shut the boot I no longer hear the 'clunk' as the lock operates so I guess something's wrong. I have the motored version; if I push the button, the boot closes and then reopens. If I manually close the boot, it stays shut [thankfully] but I get the warning on the DIS that the boot is open. Thanks - Julian
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Audi A8 3.0TDi MY2016 in Nautilus Silver. Audi A8 3.0TDI MY2005 in Midnight Blue. Gone since 2018, after 10 years! |
#2
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Mine had the pull-down (soft close) motor fail on it and did that - did it have that on yours? could be the soft close motor itself or the cable running to it (this is different to the actual boot open/close motor)
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Confidence is the feeling you have before you know better . . . . Audi A8 D2 3.7 Quattro Sport 1999 FL - Melange 2nd Place Winner - A8-Freunde Annual German Meet 2012 at Edersee 20" x 9" Bentley GTC Wheels with 385mm W12 Front Discs & Bentley Caliper Covers, Front Lowered on Coilovers, Xenons, Combined DRLs and LED Foglights to modified OEM front fog lamp position, Alcantara/Leather, Full Black Alcantara headlining + pillars and blind shelf, Bespoke Flat Bottomed Sports Steering Wheel, Dark Myrtle Wood, Autodim Mirrors, Bose, Blinds, Digital TV, Ski Hatch, Modified rear exhaust section for extra V8 Burble Audi S8 D2 Final Edition 2002, Avus Silver with Red Leather Interior Tiptronic with Sport mode button, Sony rear entertainment package, Bose sound system, Audi Navigation Plus, 20 inch Final Edition alloys, Full Cat Back Stainless Milltek exhaust, giving a great V8 burble Audi A8L D2 4.2 Petrol with LPG - Ebony Black Audi A8L D4 FL 4.0T Petrol twin turbo - Havana Black Audi A2 1.6 FSi Sport - Dolphin Grey with Votex body kit and Red Leather Interior and some other A8's A8L's and Mercs |
#3
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Sorry, I don't understand what you mean by the soft close motor.
The boot motor and cable that open and shut the boot are fine; my problem is that when the lock mechanism in the boot door comes down to meet the locking plate, there's no longer a motorised 'clunk' as the lock 'wraps around' the locking plate pin. I'm hoping that someone can tell me what triggers the motor activation and what could have failed on my car. Thanks & Regards - Julian
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Audi A8 3.0TDi MY2016 in Nautilus Silver. Audi A8 3.0TDI MY2005 in Midnight Blue. Gone since 2018, after 10 years! |
#4
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I think there's a micro switch in the latch part of the lock (your first picture). I had the same problem and sprayed copious amounts of WD40 in and it's worked ever since
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. Nite Blue 3.0L SE Quattro |
#5
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Quote:
Julian
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Audi A8 3.0TDi MY2016 in Nautilus Silver. Audi A8 3.0TDI MY2005 in Midnight Blue. Gone since 2018, after 10 years! |
#6
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Quote:
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Confidence is the feeling you have before you know better . . . . Audi A8 D2 3.7 Quattro Sport 1999 FL - Melange 2nd Place Winner - A8-Freunde Annual German Meet 2012 at Edersee 20" x 9" Bentley GTC Wheels with 385mm W12 Front Discs & Bentley Caliper Covers, Front Lowered on Coilovers, Xenons, Combined DRLs and LED Foglights to modified OEM front fog lamp position, Alcantara/Leather, Full Black Alcantara headlining + pillars and blind shelf, Bespoke Flat Bottomed Sports Steering Wheel, Dark Myrtle Wood, Autodim Mirrors, Bose, Blinds, Digital TV, Ski Hatch, Modified rear exhaust section for extra V8 Burble Audi S8 D2 Final Edition 2002, Avus Silver with Red Leather Interior Tiptronic with Sport mode button, Sony rear entertainment package, Bose sound system, Audi Navigation Plus, 20 inch Final Edition alloys, Full Cat Back Stainless Milltek exhaust, giving a great V8 burble Audi A8L D2 4.2 Petrol with LPG - Ebony Black Audi A8L D4 FL 4.0T Petrol twin turbo - Havana Black Audi A2 1.6 FSi Sport - Dolphin Grey with Votex body kit and Red Leather Interior and some other A8's A8L's and Mercs |
#7
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Julian,
There are two motors involved. The one that Neil has pointed out is on all cars and is the one that locks the boot. The other motor is the optional one that powers the boot lid up and down. This is for idle folk like me.
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Ray at Wigan Pier 2014 A8L D4 4.0TFSI Gold (Sticker says "Beige") Can't leave you in a black smoke cloud anymore.. In progress, Nothing left to do. Gone 2004 A8 D3 3.0 TDI. Ebony Pearl Black (with little bits of other colours and glitter) |
#8
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So I've only just read the updates to this thread as I forgot I was going away for the weekend
It's my locking mechanism that's not working; I've just had a look and I still can't work out what's going on when the 'black box' on the boot lid comes down and fits into the slot with the pin in it [Although I do now realise there's some sort of cable that gets pulled somehow from a motor in the boot thanks to the diagrams above]. But I presume: a) the 'trigger' for the process is the boot coming down and the 'hook' in the boot lid box triggers the motor that b) gets the motor to pull c) the cable that's attached to the pin in slot. So I guess the problem could be in any of these parts? Does VCDS have tests I can run to see which bit may not be working? thanks - Julian PS Just realised that I've had a few DTCs in my VCDS scans in the last six months but couldn't work out what part that was. Code:
Address 46: Central Conv. Labels:. 4E0-910-289.lbl Part No SW: 4E0 910 289 A HW: 4E0 907 289 Component: Komfortgeraet H04 0040 Revision: 00400004 Serial number: W040411110043 Coding: 0000249 Shop #: WSC 02313 785 00200 VCID: 275D9CFD963CD57EF0-8072 Subsystem 1 - Part No: 4E0 910 853 Component: Heckdeckel P14H06 0070 Subsystem 2 - Part No: 4E0 907 719 Component: Neigungssensor H03 0020 1 Fault Found: 00892 - Switch for Trunk Closing Cylinder (F248) 007 - Short to Ground - Intermittent Freeze Frame: Fault Status: 00100111 Fault Priority: 3 Fault Frequency: 9 Reset counter: 25 Mileage: 373302 km Time Indication: 0 Date: 2017.11.02 Time: 09:22:08
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Audi A8 3.0TDi MY2016 in Nautilus Silver. Audi A8 3.0TDI MY2005 in Midnight Blue. Gone since 2018, after 10 years! |
#9
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Can you not trigger the lock using the side of a large screw driver? Does it latch? Does the striker plate move down an inch or so?
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#10
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I know I have a D2 not a D3, but I've replaced my boot latch more than once due to (in my case) mostly microswitch problems (also broken nylon internals).
I certainly used the shaft of a screwdriver for testing locking and unlocking with the lid open, very useful trick. I don't know if the D3 latch is physically the same, but if it is swapping the microswitch is pretty easy and I have a couple of spare ones if it's the same.
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2003 D2 FL S8. Irish Green Pearl/Beige. Solar sunroof, auto-dim mirrors, electric rear seat functions and extended leather. Ski hatch retrofit. Aftermarket reversing camera. DVB-T and XCarlink now removed as redundant. 2016 Volvo V40 T5 Cross Country (4WD) with ALL the toys including adaptive cruise etc. etc. Osmium Grey with Blonde/Charcoal leather interior. Polestar performance "optimisation". (Even rarer than a D2 S8!) Oh, and a brand new engine at just under 30,000 miles on the factory one! Finally: gone, but not forgotten..... 1998 D2 PF S8. Agate Grey/Platinum. Every option (I think) except electric rear seats, Tiptronic steering wheel, ski hatch, towbar & dimming door mirrors. e.g. Cruise control, NavPlus/TV, Bose, GSM, Xenons, Solar roof, Parking sensors, Alcantara/leather everywhere of course. (internal dimming mirror added later) 1998 (very early) Ford Focus 1.8 Zetec; ABS/TCS, Heated screen/mirrors, Aircon. Added Auto-dim mirror, Leather seats, Trip computer, Cruise control, OEM Ford SatNav with CD changer. And before that a lot of Rover 800s, a few oddities, a lovely Triumph Dolomite 1850HL with Overdrive and way back in my schooldays an Austin Seven aka Mini 850! Last edited by HPsauce; 23rd April 2018 at 08:45 PM. |
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