Topic: It is done.

[JohnnyMac]

That’s worth a shot. Thanks for the idea.


Costco Energizer
or
Motomaster Eliminator?

If the same price, Costco, if not, just get whichever has the best price and warranty.

[ArticSteve]

Battery suggestion great.  That battery could be 8 years old almost.

That’s worth a shot. Thanks for the idea.


Costco Energizer
or
Motomaster Eliminator?

I'd get from Costco.

[marcus_go]

Yeah, low battery voltage from a weak battery was kinda what I thought from the start. Especially if it is original.

[rrocket]

Yeah, low battery voltage from a weak battery was kinda what I thought from the start. Especially if it is original.

Yea I've noticed plenty of odd behavior with low batteries in luxury cars with tons of electronics.

[bridgecity]

^ Seems strange for a transmission fault thought, no?  Maybe not with all the electronics associated with them these days.

[rrocket]

^ Seems strange for a transmission fault thought, no?  Maybe not with all the electronics associated with them these days.

No!

Even my Lexus as far back as 98 used to go mental with low battery. Every warning light would light up. All of them. Our Audis also did the most bizarre things with weak battery.

Perhaps the mechatronics in the tranny might be sensitive to input voltages?

On some cars, if the voltage isn't correct, the system thinks the component is faulty/defective and behaves accordingly. Hence the warning lights.

Don't think this is EVERY car but have seen some really, really weird stuff (particularly with our Audis) when battery is low.

[aquadorhj]

^ Seems strange for a transmission fault thought, no?  Maybe not with all the electronics associated with them these days.

No!

Even my Lexus as far back as 98 used to go mental with low battery. Every warning light would light up. All of them. Our Audis also did the most bizarre things with weak battery.

Perhaps the mechatronics in the tranny might be sensitive to input voltages?

On some cars, if the voltage isn't correct, the system thinks the component is faulty/defective and behaves accordingly. Hence the warning lights.

Don't think this is EVERY car but have seen some really, really weird stuff (particularly with our Audis) when battery is low.

you would think it's simple to build battery performance check at the start up routine easily, rather than lighting up christmas tree in the dash....

[mmret]

Replaced it and drove around for a bit. Upon restarting the car was normal.

The battery that came out was a Motomaster AGM, datecode September 2020. It was in the Volvo for a few years before I replaced it and put it into the MDX, where it replaced the original battery from late 2016.

So not a very old battery. It read 12.55V resting which should be ok I'd think.

Unfortunately I do not have the receipt any more otherwise I'd go take it back as its within 3 years. Oh well.

Fingers crossed. The new battery read 12.75 resting. Honestly not sure this is enough of a difference to convince me that this is really what it is but who knows, could be some other factors involved other than resting voltage.

Thx for the suggestion all.

[PJungnitsch]

Might want to put it on a trickle charger as well. Our RX seems to need a slow drink at the well occasionally, despite the running around town it does

[ktm525]

Sounds like you have a multimeter.. Anything 12.2V standing or below is suspect.  That being said if your mulltimeter has a memory function you can try this if you still had the old battery hooked up.

1) hook multimeter up and record voltage (12.55V in your case)
2) hit memory and start the car. The multimeter will record the lowest voltage (ie. voltage under load)
3) if no memory watch the multimeter as someone else starts car. If it drops below 9.6 the battery is wonky.

This is similar to a  load test at a parts store.

[rrocket]

Replaced it and drove around for a bit. Upon restarting the car was normal.

The battery that came out was a Motomaster AGM, datecode September 2020. It was in the Volvo for a few years before I replaced it and put it into the MDX, where it replaced the original battery from late 2016.

So not a very old battery. It read 12.55V resting which should be ok I'd think.

Unfortunately I do not have the receipt any more otherwise I'd go take it back as its within 3 years. Oh well.

Fingers crossed. The new battery read 12.75 resting. Honestly not sure this is enough of a difference to convince me that this is really what it is but who knows, could be some other factors involved other than resting voltage.

Thx for the suggestion all.

What is it when vehicle is running?

[ArticSteve]

Replaced it and drove around for a bit. Upon restarting the car was normal.

The battery that came out was a Motomaster AGM, datecode September 2020. It was in the Volvo for a few years before I replaced it and put it into the MDX, where it replaced the original battery from late 2016.

So not a very old battery. It read 12.55V resting which should be ok I'd think.

Unfortunately I do not have the receipt any more otherwise I'd go take it back as its within 3 years. Oh well.

Fingers crossed. The new battery read 12.75 resting. Honestly not sure this is enough of a difference to convince me that this is really what it is but who knows, could be some other factors involved other than resting voltage.

Thx for the suggestion all.

You replaced an AMG battery that was only 2.5 years old and had a resting voltage of 12.55   

[mmret]

Alright fine you’ve all shamed me into it I’ll try it with the old battery tomorrow.

EDIT: then again I am kinda lazy and I’d think this new battery is no longer returnable so whatever

[ktm525]

An AGM battery will tend to read higher since it has lower internal resistance. A battery can have normal looking resting voltage but fail under load if the internal resistance is too high.  A voltage drop under load is the tell tale symptom. This momentary low voltage drop is what sends modern cars systems freaking out.. But yeah at 12.55 battery didn't seem to be the cause although it is in the grey area for an AGM.

[ktm525]

Run the new battery. If the symptoms don't reappear then take the win.

[mmret]

The fact that the blind spot and cameras stopped working at the same time (and also like that other link someone found, the rear mirror tilt down stopped working too) all sounds like electrical gremlin…. Anyways will see how it goes.

[ktm525]

Check the battery ground and connections . You may have inadvertently solve those by replacing battery. Also sometimes there is a battery management system box beside battery. Check that for ground corrosion and all connections tight. You may have also fixed the glitch with a power off/on reset when you did the battery swap/

[Blueprint]

This reminded me of Car and Driver's long term S60 issues. In the printed mag, the paper's title was "CTRL+ALT+DEL"  The "reboot" mentioned in the header was quite more extensive...

https://www.caranddriver.com/reviews/a15115912/2012-volvo-s60-t6-awd-long-term-test-review/

[PJungnitsch]

^ Seems strange for a transmission fault thought, no?  Maybe not with all the electronics associated with them these days.

No!

Even my Lexus as far back as 98 used to go mental with low battery. Every warning light would light up. All of them. Our Audis also did the most bizarre things with weak battery.

Perhaps the mechatronics in the tranny might be sensitive to input voltages?

On some cars, if the voltage isn't correct, the system thinks the component is faulty/defective and behaves accordingly. Hence the warning lights.

Don't think this is EVERY car but have seen some really, really weird stuff (particularly with our Audis) when battery is low.

you would think it's simple to build battery performance check at the start up routine easily, rather than lighting up christmas tree in the dash....

You would think. And the thing is it does disable things. On the Lexus low voltage seems to disable the brake booster, at least for a moment at startup, and disabling AWD is a popular one too

Yet no 'voltage low', or even 'possible battery issue' warning

[Blueprint]

^^ Shows why manufacturers are moving up to 48V architecture