Low Battery - still happening after battery re-set
Thread Starter
|
Senior Member
Joined: Feb 2017
Posts: 260
Likes: 66
From: San Antonio, Texas
Low Battery - still happening after battery re-set
I'm going through the "Low Battery - Please Start Car NOW!" problem. Had the car in for service two months ago. Had the problem for the first time last week; it gave me the message when I sat down in the car. Did the battery disconnect, wait ten minutes routine. Seemed OK - then I noticed that the Hazard Light button was still lit. Today, the message was on before I got to the car, not when I got in. Did the battery disconnect again, and the Hazard light is still on.
Any more work-arounds, or do I have to entrust it to the dealer??
Any more work-arounds, or do I have to entrust it to the dealer??
Thread Starter
|
Senior Member
Joined: Feb 2017
Posts: 260
Likes: 66
From: San Antonio, Texas
Took it to the dealer and told them the symptoms. They found the battery to be low, charged it, and found out it was fine. The they ran out of time and coldn't offer me a loaner, so I now have an appointment for November 23rd - that's the soonest they could get me a loaner. Didn't even wash the car - they knew I was in a hurry (but didn't ask if I wanted it washed...)
Trending Topics
Thread Starter
|
Senior Member
Joined: Feb 2017
Posts: 260
Likes: 66
From: San Antonio, Texas
Yes, I'm a Monster (and a lazy pig)!
I had the car completely coated with Ceramic Pro two years ago, car wash it, and it still looks better than new.
I also read research that said hand washing was more likely to cause deeper, irregular scratches than car washes, which make shallower scratches in a circular pattern - but it may have been funded by the Car Wash Lobby :-))
I had the car completely coated with Ceramic Pro two years ago, car wash it, and it still looks better than new.
I also read research that said hand washing was more likely to cause deeper, irregular scratches than car washes, which make shallower scratches in a circular pattern - but it may have been funded by the Car Wash Lobby :-))
Last edited by FullChat; Nov 5, 2018 at 09:52 PM.
Senior Member
Joined: Oct 2018
Posts: 263
Likes: 196
From: New York
I didn't drive my car today and peered in the window to notice the low battery warning in the gauge cluster and the hazard button lit, about 24 hours after I'd parked it.
Do I have to lock the car for all the electrics to shut off? I don't typically bother locking the car in my garage.
Do I have to lock the car for all the electrics to shut off? I don't typically bother locking the car in my garage.
Veteran Member
Joined: May 2013
Posts: 6,988
Likes: 2,662
From: Metrowest Boston
No, there's an issue with some cars where they don't go to sleep properly after an OBD device was connected, if it was disconnected in software properly at the end of the session. The solution is to disconnect the battery for a brief period, then reconnect it.
I just stumbled on the recommended procedure when reconnecting the battery. Note that most folks don't do this, other than the last step.
I just stumbled on the recommended procedure when reconnecting the battery. Note that most folks don't do this, other than the last step.
1. Connect the battery cables and tighten
to 6 Nm. Ground cable must be connected
last
2. Install the battery cover and close the
luggage compartment lid.
3. Start the engine and allow to idle until
the engine reaches normal operating
temperature.
4. Switch the engine off.
5. Restart the engine and allow to idle for
approximately two minutes (this will allow
the ECM to learn the idle values).
6. Apply and hold the brake pedal, select
drive and allow the engine to idle for a
further two minutes.
7. Drive the vehicle for approximately five
miles/eight kilometres of varied driving to
enable the ECM to complete it's learning
strategy.
8. Reset the audio unit and climate control
assembly to original customer settings.
9. Reset the door window motors. For
additional information, refer to: Door
Window Motor Initialization (501-11 Glass,
Frames and Mechanisms, General
Procedures).
to 6 Nm. Ground cable must be connected
last
2. Install the battery cover and close the
luggage compartment lid.
3. Start the engine and allow to idle until
the engine reaches normal operating
temperature.
4. Switch the engine off.
5. Restart the engine and allow to idle for
approximately two minutes (this will allow
the ECM to learn the idle values).
6. Apply and hold the brake pedal, select
drive and allow the engine to idle for a
further two minutes.
7. Drive the vehicle for approximately five
miles/eight kilometres of varied driving to
enable the ECM to complete it's learning
strategy.
8. Reset the audio unit and climate control
assembly to original customer settings.
9. Reset the door window motors. For
additional information, refer to: Door
Window Motor Initialization (501-11 Glass,
Frames and Mechanisms, General
Procedures).
Veteran Member
Joined: Feb 2011
Posts: 3,917
Likes: 2,520
From: Victoria, Canada
I didn't drive my car today and peered in the window to notice the low battery warning in the gauge cluster and the hazard button lit, about 24 hours after I'd parked it.
Do I have to lock the car for all the electrics to shut off? I don't typically bother locking the car in my garage.
Do I have to lock the car for all the electrics to shut off? I don't typically bother locking the car in my garage.
Veteran Member
Joined: Feb 2014
Posts: 9,016
Likes: 3,655
From: Adelaide, South Australia
Yep, I always (double) lock my car even when it is in the garage and I hook up the battery tender roughly once a fortnight to freshen up the battery, and I have never had a single battery or electrical system problem despite using the OBD2 port a fair bit.
If you have fully charged the battery and then locked/armed the car for 30 minutes(this clears the message from cache in the touch screen otherwise it keeps popping up) then you probobly have a bad battery. It should be tested with a testor that measures reserve amps hours, cold cranking amps as well as voltage. Jaguar land rover made all dealeds buy a $5000 genrad 8 tester that comunicates directly over the internet with jlr when tests are run and the info. Probobly because to many battery where being replaced needlessly. Regardless these are very good testers and i have had many customers say they had their battery tested and its something else. We run test and nope it failed. So i dont know what other shops or auto parts stores use, but they suck.
Personally i dont think the batt would be good if the alternator was failing since thats what keeps the battery good. The gen rad testor can easily take 2 hours to properl;y test a battery. And since you said you were rushing them and didnt even get a car wash......... 
Senior Member
Joined: Sep 2018
Posts: 244
Likes: 71
From: Sweden
Took it to the dealer and told them the symptoms. They found the battery to be low, charged it, and found out it was fine. The they ran out of time and coldn't offer me a loaner, so I now have an appointment for November 23rd - that's the soonest they could get me a loaner. Didn't even wash the car - they knew I was in a hurry (but didn't ask if I wanted it washed...)
Veteran Member
Joined: Feb 2014
Posts: 9,016
Likes: 3,655
From: Adelaide, South Australia
Count yourself lucky then, the last thing you want is some pimply apprentice grinding away at your paintwork with a grit laden rag until it is covered in swirls.