Battery Dead - Reason Unknown
#1
Battery Dead - Reason Unknown
Today the F-Type called my bluff on its "battery low, please start engine" warning. Can't seem to figure out what it was that drained it but the warning had been appearing at startup for the past three days. Figured out how to use the key, etc to gain access to battery but after quick research, others say not to jump start as you would normally. Can anyone shed some light on how I am to recharge the battery and advise on any small drainage culprits I may have missed? Thanks in advance, gang.
#2
The following 2 users liked this post by Unhingd:
ImNotFamousAnymore (03-27-2016),
jiminfl (02-24-2019)
#3
Thanks for that. In terms of charging it back up, can I use a trickle charger or jump start like I would any other vehicle? I've seen other places that you're not supposed to.
#4
If a module is staying up at night, that could be what killed your battery. I saw an XF recently that had a couple of wires coming from the trunk harness fray. Perpetual "Boot open" message which killed a battery. She didn't know it because she parks in a garage.
Also, if you're parking in a garage, it doesn't hurt to give a chirp of the remote to make sure it locks. If a door is left ajar, it won't sleep. You'll know because it gives you 2 honks.
Hope that helps!
Ryan
The following 2 users liked this post by Ryan23:
ImNotFamousAnymore (03-27-2016),
Zoomzoom17 (03-28-2021)
#5
The following 3 users liked this post by Dogbreath!:
#6
You can charge it from the front, no problem. I would suggest bringing the car to the dealer, even if it does recharge just fine. They'll put a tester on the battery and if it fails, voila, new battery for you. Service can also run a quiescent (Kwee-es-scent) current test on your car to determine if a module isn't going to "sleep". It can take anywhere from 10-30 minutes for a Jag to get "tucked-in" and shut everything down.
If a module is staying up at night, that could be what killed your battery. I saw an XF recently that had a couple of wires coming from the trunk harness fray. Perpetual "Boot open" message which killed a battery. She didn't know it because she parks in a garage.
Also, if you're parking in a garage, it doesn't hurt to give a chirp of the remote to make sure it locks. If a door is left ajar, it won't sleep. You'll know because it gives you 2 honks.
Hope that helps!
Ryan
If a module is staying up at night, that could be what killed your battery. I saw an XF recently that had a couple of wires coming from the trunk harness fray. Perpetual "Boot open" message which killed a battery. She didn't know it because she parks in a garage.
Also, if you're parking in a garage, it doesn't hurt to give a chirp of the remote to make sure it locks. If a door is left ajar, it won't sleep. You'll know because it gives you 2 honks.
Hope that helps!
Ryan
Thanks for the insights! I always give it a two click lock and it never gave me issues. I suppose I will take it in for a look. It was just in for inspection a week ago. Is it possible that they did something when updating software...?
Last edited by ImNotFamousAnymore; 03-27-2016 at 06:21 PM.
#7
It does sleep in the garage and the key comes in with me so I can't attribute it to that, unfortunately.
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#8
You can charge it from the front, no problem. I would suggest bringing the car to the dealer, even if it does recharge just fine. They'll put a tester on the battery and if it fails, voila, new battery for you. Service can also run a quiescent (Kwee-es-scent) current test on your car to determine if a module isn't going to "sleep". It can take anywhere from 10-30 minutes for a Jag to get "tucked-in" and shut everything down.
The following users liked this post:
ImNotFamousAnymore (03-27-2016)
#9
Ryan
The following users liked this post:
ImNotFamousAnymore (03-27-2016)
#10
Bingo. I notice that my battery management system has to be reset with a battery disconnect every time I have a flash done through the ODBII port.
#12
Now if you're talking about other *ahem* flashes (not performed at the dealer) that could be the case. I notice that "other" flashes do exhibit some odd behavior.
Ryan
#13
#16
Picked up the car Friday, I've driven over 200 miles since then. Most of them are highway miles. This afternoon the the "battery low, please start engine message" appeared. I took it for a 20 mile drive. When I went to test drive this vehicle the dealership had it on a trickle charger in the showroom. Sounds like a trip back to the dealer is in order.
#17
As for my battery draining issue, I brought it back to my dealer and they ruled it as a defective battery. Once they replaced it I have never had the issue come back. Even have my dash cam recording 12hrs after the car is shut off, no problems.
Last edited by TwiztOG43; 03-27-2016 at 08:25 PM.
#19