tonycharente
Member
- Messages
- 182
The battery on my LHD 2005 4200 CC coupe (MY2006) was discharging quickly.
I decided to try to find the source of my rapid discharge - measure the discharge rate with a multimeter on amperes in series between the battery and the ground cable, then remove one fuse at a time, one after the other, until I found the culprit.
Leaving it long enough for all systems to ‘go to sleep’, I had a discharge rate of 0.30 amps. It's MUCH too much, enough to completely drain the battery in a week or two. I know that modern cars discharge quickly, and that the Maserati are perhaps among the worst, but being unable to start after a few days seemed excessive to me.
After removing several fuses, "bingo", by removing fuse number 29 (AKA “F22”) ("Ceiling lights, ceiling light timer, electric seats, luggage compartment and fuel flap opening controls") : drop from +/- 0.30 amps to +/- 0.01 amps.
Then, with the fuse number 29 back in place, I disconnected one of the multi-pin connectors under the driver's seat and again: drop from +/- 0.30 amps to +/- 0.01 amps.
My driver's seat is has the memory option.
I know (from the forums) that the seat ECU can cause problems, but I don't want to replace it unnecessarily.
Do you have any ideas, please?
Many thanks
Tony
I decided to try to find the source of my rapid discharge - measure the discharge rate with a multimeter on amperes in series between the battery and the ground cable, then remove one fuse at a time, one after the other, until I found the culprit.
Leaving it long enough for all systems to ‘go to sleep’, I had a discharge rate of 0.30 amps. It's MUCH too much, enough to completely drain the battery in a week or two. I know that modern cars discharge quickly, and that the Maserati are perhaps among the worst, but being unable to start after a few days seemed excessive to me.
After removing several fuses, "bingo", by removing fuse number 29 (AKA “F22”) ("Ceiling lights, ceiling light timer, electric seats, luggage compartment and fuel flap opening controls") : drop from +/- 0.30 amps to +/- 0.01 amps.
Then, with the fuse number 29 back in place, I disconnected one of the multi-pin connectors under the driver's seat and again: drop from +/- 0.30 amps to +/- 0.01 amps.
My driver's seat is has the memory option.
I know (from the forums) that the seat ECU can cause problems, but I don't want to replace it unnecessarily.
Do you have any ideas, please?
Many thanks
Tony