[MichaelCG]

This is what apparently happens when you leave your car in the garage for 10 days not on a charger.

Initially it was only Park Assist which really confused me. It wasn’t until SS threw an error that I had an idea of what was up. I assume since my car sat for 10 days one of the batteries must be angry.

Ran my errands, brought the car back home and hooked up the CTEK. 24 hrs later took it for a drive and no more error messages….yet.

This is the first time I have let it sit that long off the charger. I usually charge it at least once a month or if it will sit for more than a week.

2020 V60 17k miles


Sent from my iPhone using Tapatalk

 

[Power6]

Yup, I have had the sam experience too, same messages. It's strange the Park Assist errors, whatever is the cause, it does seem to be consistent, when the batteries are running low you get that warning.

 

[vroomr]

Oh, I just started a new thread on this topic, should've searched first. My car is not getting much use these days, so maybe it's charger time. And yes, also a '20 V60.

 

[vroomr]

Do I need to disconnect the battery before attaching a charger?

 

[FutureOdin]

I'd recommend taking it to the dealer, if you have any warranty left. Indicative of a faulty support battery. I had the same errors, and mine was replaced under warranty.

 

[vroomr]

Yes, time for a warranty claim.

 

[Power6]

If you get no love from the dealer, i.e. the batteries test good, you may be told they just need to be charged.

When you connect a charger, use the (+) under the red flip cap under the hood and there is a ground stud to the right beside the underhood fuse box for (-) that is the reccomended connection, no need to remove anything.

 

[vroomr]

Got the battery replaced under warranty today. That was easy.

 

[MichaelCG]

I have just been hooking the charger up to the underhood post once a week and no issues since. I would not be surprised if the battery needs replaced. I am still under warranty until Aug so I may schedule an appt with the dealer soon...well probably in 2-3 months when they can get me in. I just bought a new ODBII reader so starting to poke around watching the various voltages and current load.

 

[Wayne T5]

Working from home and not driving too much I keep mine on a charger pretty much all the time. Hood open just to show the connections. I have a quick disconnect from the trailing edge of the hood so never have to open it to connect.

 

[1999_V70]

Start/Stop Support Battery Service Required

I have a 2021 S60 Momentum CPO. When I bought it (March '22), this warning message was on. They replaced the aux battery prior to delivery but the warning has popped up occasionally. I took it to the dealer a couple of weeks ago and at that time it was also reporting park assist system...

www.swedespeed.com

 

[MichaelCG]

My alerts popped back up today after the car sat for 2 days. Pretty sure I even had it on the charger last weekend. I hooked up the OBD reader and the AUX battery was at 10.2V. So now scheduling an appt with the dealer.

 

[FutureOdin]

Yeah, even on a charger, a bad battery is a bad battery. Not sure why, but these start/stop systems with aux batteries seem to be prone to failure. Had to replace one on my Jeep Wrangler, and my Volvo. See tons of threads about them...

 

[jcalabria]

Working from home and not driving too much I keep mine on a charger pretty much all the time. Hood open just to show the connections. I have a quick disconnect from the trailing edge of the hood so never have to open it to connect.

View attachment 180168

I already have a good maintainer and extra hardwire adaptors... I need to set it up like this on my '19 S60 T6. I work from home also and sometimes the car sits for a while (last idle stint was 28 days!) I've not had any issues... car always starts right up with no error messages... but reading through these forums I'm starting to feel like I'm tempting fate.

 

[MichaelCG]

Got car into dealer this morning. They had it back to me in 20 minutes with a new Aux battery. So far all good. I will probably try to be more dilligent about charging weekly since the majority of my trips are less than 30 minutes.

I plan to connect my ODBII reader back up to see if there is more data around the Aux battery now. Before it only reported the battery temp and voltage, but not amperage. I could get the amperage of the main battery, just not aux. Wasn't sure if that was because the car was throwing codes or if that sensor doesn't actually exist on the V60.

 

[dpothier]

Car Scanner reads Aux battery amps now. It also shows the ‘average low range current’ which is a good indicator on how much is being drawn off the battery while the car is parked. If I turn my dash cam off and unplug my OBDII adapter when I park, mine is usually around -10mA, give or take a couple mA. I read somewhere that Volvo considers more than 25mA a problem (-25mA in Car Scanner) but haven't found much more info about it.


2019 S60 T6 Inscription w/advanced & Polestar tune

 

[Power6]

I plan to connect my ODBII reader back up to see if there is more data around the Aux battery now. Before it only reported the battery temp and voltage, but not amperage. I could get the amperage of the main battery, just not aux. Wasn't sure if that was because the car was throwing codes or if that sensor doesn't actually exist on the V60.

I am close to releasing an update for OrBit software, it will add a "DID reading" which is reading data fields from ECUs essentially. It's driven by the diagnostic database I have compiled for ECUs so it's hundreds, maybe thousands of data fields. I've only scratched the surface with battery before now, just reading the SoC and the SoH of the low and high voltage (PH/EV) batteries but there are a bunch more fields available from the CEM and BECM. No idea if any of it useful ;-)

 

[GoonerGreg]

If you get no love from the dealer, i.e. the batteries test good, you may be told they just need to be charged.

When you connect a charger, use the (+) under the red flip cap under the hood and there is a ground stud to the right beside the underhood fuse box for (-) that is the reccomended connection, no need to remove anything.

I have a 2020 s 60 T5. Getting both and due to working from home doing little driving. What is a good charger to get?

 

[Wayne T5]

I have a 2020 s 60 T5. Getting both and due to working from home doing little driving. What is a good charger to get?

This is how I have mine hooked up. Most folks on here like the CTEK chargers. I have a knock-off that I got from Amazon for around $30 - works great.

Amazon.com: GOOSUO Car Battery Charger and Maintainer, 6V 12V Fully Automatic Smart Battery Charger, Trickle Charger Multipurpose Set for Trucks, Motorcycles, Lawn Mower, Boat, Scooter : Automotive

Says it's no longer available but there are many other options out there.