How long does it actually take for the BMS relearn?

[guarnibl]

There ya go - you got that figured out. Bummer that it's going to cost a bunch, but you have things nailed down now anyway.

yep. As I was going down this rabbit hole I figured best case I’d have a spare old battery now but not even that.
It’s fine tho — two new quality batteries that should keep me good for another 2-3 years until they fail and I get two new free ones

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[Vtur]

Fyi for any future search.

Below is my parasitic draw test. Truck parked for over an hour. Doors locked with just the hood open. Everything are off. It draws a quarter amp. 12.6V before the test and 12.8V each when separated the batteries. Never seen a draws that high with any of my other vehicles before. A slightly weak battery might works find in other vehicles but it won't survive here.

 

[ShadowsPapa]

Fyi for any future search.

Below is my parasitic draw test. Truck parked for over an hour. Doors locked with just the hood open. Everything are off. It draws a quarter amp. 12.6V before the test and 12.8V each when separated the batteries. Never seen a draws that high with any of my other vehicles before. A slightly weak battery might works find in other vehicles but it won't survive here.

That's way high - something isn't sleeping.

 

[Vtur]

That's way high - something isn't sleeping.

Is that from the service manual? I'm curious what others are drawing. Nothing is on that I'm aware of. I'm a little surprised that my original nearly 5yr old main battery still good. I went to Japan for 3 weeks back in July and it had nonissues started right up. Aux batt replaced a few years ago and my electrical related mods hasn't changed.

 

[ecidiego]

Move the key way inside your house as far away as possible...or wrap it in aluminum foil/ throw it inside the microwave before doing this test. Let the truck fully go to sleep.

 

[Vtur]

Move the key way inside your house as far away as possible...or wrap it in aluminum foil/ throw it inside the microwave before doing this test. Let the truck fully go to sleep.

Dammit. I forgot about the keyfob, it was in my pocket and i do have proximity entry feature too . Wondering what others are getting?

 

[guarnibl]

I’ll test it with my faraday box after it sleeps for an entire night and report back in the next few days.

 

[ShadowsPapa]

Move the key way inside your house as far away as possible...or wrap it in aluminum foil/ throw it inside the microwave before doing this test. Let the truck fully go to sleep.

Yeah, if it's in communication range............. it's not a great test.

TIP - don't turn the microwave on, just in case someone is wondering

 

[ecidiego]

Yeah, if it's in communication range............. it's not a great test.

TIP - don't turn the microwave on, just in case someone is wondering

Red Danger tag policy!

 

[Flanders]

I'm curious what others are drawing.

Average of 13mA for 24 hours, measured with a Texas Instruments INA219. Base model 2023 JT with the key in the console.

I measured in several other ways here.

 

[ShadowsPapa]

Average of 13mA for 24 hours

0.013 is a whole lot less than 0.250

I wish I felt like measuring my fully loaded 2025..................

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