How can i check my battery state of charge,how good/bad it is etc?

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vw754

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I would like to know if its possible to check how much charge my battery has, i charged at a few days ago, seems ok, stop/start never works so just curious to see if battery is up to scratch.
2015 s3.
 
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Uwe

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Advanced Measuring Values:
IDE01839 -- Battery charge condition (%)

Or the traditional way: Don't turn anything on for several hours and then use a multimeter to read the battery's voltage while the battery is "at rest".



-Uwe-
 
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vw754

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CAN Gateway
Advanced Measuring Values:
IDE01839 -- Battery charge condition (%)

Or the traditional way: Don't turn anything on for several hours and then use a multimeter to read the battery's voltage while the battery is "at rest".



-Uwe-
Thank you
 
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vw754

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here it is...........cars not been driven or started for around 15 hours.

battery voltage 12.070 v
battery current -11.547 A
temp of battery sensor 11c
battery charge condition 74%
battery internal resistance 6.4 m0hm
usable battery charge 29Ah
battery voltage at rest 12.4 V
 
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vw754

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I charged the battery fully last week too.
 
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here it is...........cars not been driven or started for around 15 hours.

battery voltage 12.070 v
battery current -11.547 A
temp of battery sensor 11c
battery charge condition 74%
battery internal resistance 6.4 m0hm
usable battery charge 29Ah
battery voltage at rest 12.4 V
My MY15 S3 returns nonsence values for that and several following IDE parameters. The car is not equipped with Energy Management. If EM module is provided it should appear on the AutoScan list .
Another reason for posting scans with Qs.
 
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vw754

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You've
My MY15 S3 returns nonsence values for that and several following IDE parameters. The car is not equipped with Energy Management. If EM module is provided it should appear on the AutoScan list .
Another reason for posting scans with Qs.
You've lost me
 
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Uwe

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You've lost me
His car never had Start/Stop at all and, nor a battery management module (what he's referring to as an "EM module').

-Uwe-
 
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vw754

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His car never had Start/Stop at all and, nor a battery management module (what he's referring to as an "EM module').

-Uwe-
Oh right ok thanks for that..... Mine does it has the switch and comes up on the dash with a line through the letter" A"......... ive also checked with audi.

I have posted my battery readings to you, can you please confirm they are ok?
 
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Your measurements do not represent battery voltage at rest. Your car is very much "awake" and drawing 11.5 amps from battery.

To check real rest voltage, leave your car sitting with hood open and ignition off, wait at least few hours or over night. Then measure battery voltage with a multimeter.
 
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Uwe

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I have posted my battery readings to you, can you please confirm they are ok?
I don't "do" start/stop. I only own/drive one vehicle that had it from the factory and it is disabled, so I really don't know if those readings are adequate for it to operate.

-Uwe-
 
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vw754

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Ok..... Ive Plugged my vcds in a different audi A3 with stop start that is working, ive noticed this with vcds..... In can gateway(19) measuring values
Start/stop enable it says 'All releases are present'
In mine it says 'No release by coordinator'
No idea what that means, something obviously do with stop/start..... If anyone can shed any ideas?
 
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Uwe

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In mine it says 'No release by coordinator'
No idea what that means, something obviously do with stop/start..... If anyone can shed any ideas?
It means some other module(s) have decided some condition(s) for start/stop have not been met.

-Uwe-
 
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vw754

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It means some other module(s) have decided some condition(s) for start/stop have not been met.

-Uwe-
Oh right THANKS!
i know not having stop /start is good..... Love it! BUT.... I was trying find out if it was disabled but everything seems good....... Probably battery is the suspect..... Tjanks again.
 
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