Possible battery drain

Zakk Technician Texas Posted   Latest  
Resolved
Electrical
2015 Maserati Ghibli 3.0L 8-spd
Battery Draw

The customer states the battery died within a week. The customer states he drives the vehicle only on the weekends and when he got into the vehicle the battery was completely dead with no power inside the car. The battery is a AAA battery that they already replaced under warranty in October. I charged the battery which seemed to take longer then it should have then checked the starting/charging system and all components tested good. Hooked up an amp meter in line with the battery and let it sit over night and in the morning found the draw at .014 amps which is well within spec. Then drove the vehicle and then let it sit over the weekend and this morning hooked up my pico with a amp clamp. Found small spikes that go up to about 60 milliamps every 50 milliseconds and then bigger spikes that go up to around 90 milliamps about every minute. To me this seems like it wouldn't cause the battery to go completely dead after 1 week. Would this be considered normal or does this seem to be an actual issue?

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Matthew Diagnostician
Kentucky
Matthew
 

What’s the specs on the battery

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Gary Owner/Technician
Colorado
Gary
 

Hello, Zakk. I know absolutely nothing about Maseratis, but the fact that you've detected a pulsating battery drain up to 90 mA occurring each minute might indicate that you have a module of some type trying to wake up. I would assume there's no aftermarket devices on the vehicle. According to my experience, aftermarket devices can wake up other modules and cause similar intermittent drains. I…

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Glenn Owner/Technician
Texas
Glenn
 

Hi Zakk, I would research what is the correct battery for this application. It likely requires an AGM battery with the correct specs. These high-end vehicles do not respond well to thrifty batteries. Study the Service information to see if this vehicle has a battery sense circuit or smart circuit. Along with that, make sure nothing aftermarket has been added or plugged into a power port. A…

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Gary Owner/Technician
Colorado
Gary
 

Good advice on the battery type, Glenn…

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Zakk Technician
Texas
Zakk Update
 

The battery that is in it is a AAA AGM H8. Prodemand doesn't even have a maserati option so I have very little service info to go off of. No aftermarket things have been added to the vehicle that I can see or that the customer is aware of.

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Obie Technician
Washington
Obie
 

If you have the time disconnect the battery for several days and check SOC then. Discharge charge cycles ruin any battery not made for that. Once the battery is for sure okay, and if there are no excess draws, install a battery minder on a timer for the customer. I do that as a routine on seldom driven late model vehicles. Also, there are prodigals for seldom driven cars such as new cars in OE…

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Shane Technician
Massachusetts
Shane
 

It would probably be a good idea to get an oem battery and purchase Maserati service information.

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Eric Owner/Technician
Michigan
Eric
 

Any chance the battery needs to be registered to the vehicle, similar to BMW or MB?

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Fermin Owner/Technician
California
Fermin
 

My thoughts exactly.

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Jon Owner/Technician
California
Jon
   

Are there any aftermarket accessories installed? Remove them if there are. Maserati makes an onboard trickle charger to combat this exact thing. My father in law purchased one after owning his for only a short time. The battery would be dead after only 5-6 days of sitting. Maserati told him this was normal and sold him the charger. I do not know if that is what you are dealing with though…

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Interesting
Stephen Technician
Tennessee
Stephen
 

The 60 and 90ma pulses, themselves, should not have an appreciable draw on the battery but, shouldn’t be there unless maybe the car has a built in security system. If so they may be normal. I think that this is a scenario that goes something like; replace battery, the car has a small drain, maybe normal, : the battery stays at a low level of charge due to the long sitting, short usage cycle…

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Zakk Technician
Texas
Zakk
 

I agree with you 100%. I have charged the battery completely and I am going to give it back to the customer. Going to tell him to either purchase a battery maintainer or to drive it more often. Thanks

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Matthew Diagnostician
Kentucky
Matthew
 

I meant what is the reserve capacity that will determine if the draw in the battery will deplete the capacity in a week if not driven most newer cars have agm with 90 to 120 rc and depending on the discharge parasitic drain might cause it to be pretty depleted in a weeks time or there abouts. Who knows how long the bus is supposed to stay active and 60 - 90 ma wouldn’t indicate a module…

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Bill Owner
Maryland
Bill
 

Zakk, How long has the customer owned the vehicle ? If he recently purchased it then maybe some of the other suggestions are good. If he has owned it for a long time and has not had the problem in the past then I would keep looking for the problem.

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Gary Owner/Technician
Colorado
Gary
 

Good advice, Bill…

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Zakk Technician
Texas
Zakk Resolution
 

Thanks for all of the help everyone. The customer is aware of all the info I have gathered and he is ok with taking it and driving it more often. He will keep me up to date if the battery dies again. Thanks again.

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Gary Owner/Technician
Colorado
Gary
 

Thanks for getting back to us, Zakk…

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