Will replacing the battery result in error codes?

[Luka]

So I've got AW1 1.0 TSI 70kw/95h model. Car is now 5 years old. I've got a Topdon BT100 battery tester and I'm not able to test the state of the battery without removing the whole plus connection clamp/box since I can't see the battery specs to test it correctly. Will disconnecting the battery result in error codes from the car?

[iichel]

Only some codes about the battery being disconnected. Nothing permanent, unless you keep it off for days at end.

[RUM4MO]

Why not just assume that it is a 320A DIN and use that value when testing it?

[Luka]

Only some codes about the battery being disconnected. Nothing permanent, unless you keep it off for days at end.

Awesome, thank you!

Why not just assume that it is a 320A DIN and use that value when testing it?

Because the reading will be incorrect, I assume anyway.

[grazuncle2]

you could get an OBD lead specifically made t keep the Memory alive/powered

you need a little 12v power supply for it.. I us my emergency jump starter for that.

[RUM4MO]

Only some codes about the battery being disconnected. Nothing permanent, unless you keep it off for days at end.

Awesome, thank you!

Why not just assume that it is a 320A DIN and use that value when testing it?

Because the reading will be incorrect, I assume anyway.

Surely all your battery analyser/tester will or can test for is the voltage across the terminals and the theoretical CCA DIN or EN, new batteries when charged and before being connected up into a car circuit will give a crazy high CCA reading, both my new batteries, AGMs tested as being at least 10% over the value printed on the battery.

Any time I've tested/checked car batteries, I've accepted the value being given while the battery is still connected to the car, charged up then left for 8 hours with the ignition etc off, so all controllers in their sleeping mode, ie minimum current draw.

Edit:- actually the 760A CCA (EN) still not used AGM Bosch, tested as 900A CCA (EN) when first bought and not fitted to a car, so the "out of circuit" test result should give you a falsely high value - or at least a value that does not reflect the useful life remaining in that used battery.

[RUM4MO]

you could get an OBD lead specifically made t keep the Memory alive/powered

you need a little 12v power supply for it.. I us my emergency jump starter for that.

I agree, so easy and obvious especially if you are the sort of person that spends money on a battery analyser - well I have what you suggested AND a CTEK battery analyser.

I've also got a CTEK 12V DC support/maintenance unit, but save that for other times.