Hope someone can help with this weird issue. I have a 2009 Aston DB9 Volante which has been fine but sat not used much in the last 3 months. Over night one day last week I came to it to find a water leak underneath and I couldnt open the car with the remote. I got in using the key in the door and the alarm went off which I had to disconnect the battery to turn it off and reset it. The car battery had run low so once charged I put the battery back on to find the centre console lights, clock, stereo and satnav wont turn off when I remove the key. Only way to turn them off is to disconnect the battery. When I left it with the battery connected for a while, one of the few times the stereo and lights turned off as they should, we found the headlight washer pump was running continuously which is where the puddle of water had come from and pushed off the hose from the jet under the inner arch. Again I had to disconnect the battery to stop it.

I have charged the battery which is only a few months old, checked all fuses. cleaned the earths by the battery, and pulled all relays to check if it was a sticky relay but all done nothing.

If anyone has any idea what the check next it would be a great help.

 

Have you tried turning the alarm on and off with the key fob? Than once you cycled the alarm and ran the car, turn the alarm on and off, does this help?
I've had my fair share of strange issues with my DB9, I've managed to resolve every single one.
Did you check every MAIN Fuse as well?
Also, tap the storage battery kill button in the trunk, than the on button under the passengers back seat battery compartment.

Let me know your findings, we will fix your Aston.

 

Hi,
I have locked and unlocked it a few times, also had the battery on and off more times than I can remember partially hoping it would reset the memory but also because I cant turn the ignition to the dash off.
I have pulled every fuse to try and get them to turn off but to no luck but I havent actually tested all fuses so I could give that a go i guess.

one strange thing I noticed this week is that just after putting the battery on, I was in the boot and heard a relay click in the boot fusebox and the dash turned on again. I pulled all the relays out but it still stayed on which makes no sense to me. I also have air suspension on the car and the controler is connected to the boot fusebox and this also turns on with the stereo and satnav. I had originally thought it might be the centre console module but now im thinking its something turning power on to the fusebox or part of it in the boot.

 

The items you mention do not share a common circuit, so it’s not something simple like a fuse or relay. My thought is you have a short somewhere that is feeding 12v+ to what normally are switched circuits, or a failed diode that is allowing 12V+ to backwash into your switched circuits. Also could be a problem with the ignition cylinder. All of these are WAG’s and what you really need is some serious short detection equipment. So a dealer or an auto electric shop bold enough to take on an AM. Nearest thing I’ve personally experienced was a Mercedes in which a short in one of the electric window motors was feeding into a main harness bus and causing random malfunctions throughout the interior electrics.

 

So, for what's worth, the description you provide reminds me of when my convertible roof control module crapped out. I got weird(!!) errors that all disappeared when I disconnected the module from canbus. The module is located inside the left rear wheel well. You have to pull the tire & the fender liner to gain access to a access port. IF your errors disappear, it's the module. Then it's just a simple assault on your wallet. You can get another from scuderia, but you have to have the dealer (with AMDS) program it.

If you are lucky, this is the problem as it does fix it.

Good luck!
Larry

 

Thanks guys, I might give the roof module a look at. I have an auto electrician coming out soon so hopefully get to the bottom of it. I was thinking it might be the centre console module but seems theres no way of testing it other than swapping it out for a good one

 

Canbus errors caused by the roof module are randomly weird. Pull the module and report back!

 

I just removed and unplugged the roof module and the problem is still there with parts of the centre console turning on with no key in the ignition. Is there any way to test the centre console module as this was my only other thought?

 

Do you mean the Center Console Module or the Central Electronic Module? The CCM is occasionally mentioned in the shop manual but it is not well defined nor is the location described. It must NOT be confused with the Central Electronic Module. The CCM ls found at the back of the vertical panel housing the clock, the radio display and the a/c controls. It is a black plastic box attached to the tear of a white box that houses the 3 rotary ***** for climate control. It’s not entirely clear which functions the CCM controls, I know it controls wipers and at least some aspects of the infotainment system, and maybe HVAC But IIRC your original post mentioned systems unrelated to the CCM. Anyway, I’m not aware of any way to “test” the CCM or for that matter, to disconnect it.

 

I reviewed your original post and cannot say conclusively that any of your problems are unrelated to the CCM.

what did the auto electric guy say?

 

Hi, Thanks for the help. Unfortunately the Auto electrician never turned up so I have been testing what I can myself. I have tested it with a couple of different diagnostic computers but both dont show any faults as it all works fine when the ignition is on.

I think I mentioned earlier in the thread that I heard a click in the fuse box in the boot which switched on the parts of the centre console while there was no key in the ignition. I pulled all the relays in the fuse box and they stayed on so this is a rea strange one.

 

Right im hoping I have had a break through. I pulled the roof control module and nothing changed, even with it out the car the ignition still turned itself on, so tonight I disconnected the centre console module ECU, the one behind the sport button and the ignition hasn't come back on. I'm therefore guessing this is whats at fault? any ideas on if I should go ahead and buy a replacement would be welcomed as its a lot of money to spend if it doesn't fix my issue.

 

Another thought is that this centre console module sits behind the button for the parking sensor which have also recently decided to stop working. Im wondering if this also controls the sensors and could be giving this fault as well?

 

Looks like the dashboard lights are coming on due to a faulty low battery, the headlight washer pump is still coming on straight away though so I have had to pull the fuse on it which luckily just stops it and nothing else.
does anyone know where the relay is for the headlight washer? seems to possibly be part of the main fuse box under the bonnet? be nice to test it to see if this is faulty or if something else is switching it on as a fault