1999 Toyota 4Runner — battery dies after the car sits for a weekend

Checked the easy stuff on the 1999 Toyota 4Runner and found one clue worth chasing before I book a shop. Cold start is when I can actually reproduce it.

Checked the easy stuff on the 1999 Toyota 4Runner and found one clue worth chasing before I book a shop. Wrote this up on my lunch break.

Don't clear the alert just to make the screen pretty. Leave the alerts on the 1999 Toyota 4Runner so service can see what you saw. That's where I'd start. If they can't show the line item, I assume it's hiding. Wrote this up on my lunch break.

Charge curves lie if you don't match starting SOC and temp. Match starting SOC and battery temp if you're comparing 1999 Toyota 4Runner charge sessions. I'd do that before spending real money. Have you gotten a second quote in writing? Make the next action something you can finish this week. If that fails I'll eat the diagnostic fee.

Charge curves lie if you don't match starting SOC and temp. Match starting SOC and battery temp if you're comparing 1999 Toyota 4Runner charge sessions. I'd do that before spending real money. Was this after sitting overnight? Might be overthinking it, but I'd rather overthink than overspend.

I'd treat 12V warnings as a no-ignore. On the 1999 Toyota 4Runner, I'd get the 12V/DC-DC side checked even if the traction pack looks fine. That's where I'd start. On “battery dies after the car sits for,” that was the fork that mattered for me. Have you gotten a second quote in writing? Cold start is when I can actually reproduce it.

Don't clear the alert just to make the screen pretty. Leave the alerts on the 1999 Toyota 4Runner so service can see what you saw. I'd do that before spending real money. This is from a 1999 Toyota 4Runner in Washington DC. Just my two cents from doing this recently. I'm in no rush to be a hero on it.

I'd treat 12V warnings as a no-ignore. On the 1999 Toyota 4Runner, I'd get the 12V/DC-DC side checked even if the traction pack looks fine. I'd do that before spending real money. On “battery dies after the car sits for,” that was the fork that mattered for me. This is from a 1999 Toyota 4Runner in Washington DC. Stop there until you know. I refuse to clear codes until someone else sees them.

Low-voltage gremlins will strand you even with a full pack. Try a second charger before blaming the 1999 Toyota 4Runner — site sharing and pack temp change the curve a lot. I'd do that before spending real money. This is from a 1999 Toyota 4Runner in Washington DC. Run the total, not the monthly, before you commit. Might be overthinking it, but I'd rather overthink than overspend.

Charge curves lie if you don't match starting SOC and temp. Match starting SOC and battery temp if you're comparing 1999 Toyota 4Runner charge sessions. I'd do that before spending real money. If you share a photo of the worksheet, easier to sanity-check. I'll poke at it this weekend.

Low-voltage gremlins will strand you even with a full pack. Try a second charger before blaming the 1999 Toyota 4Runner — site sharing and pack temp change the curve a lot. That's where I'd start. When does it actually happen? I refuse to clear codes until someone else sees them.

Low-voltage gremlins will strand you even with a full pack. Try a second charger before blaming the 1999 Toyota 4Runner — site sharing and pack temp change the curve a lot. That's where I'd start. A shop burned me once by skipping that step. If this is nothing, great. I want that in data.

Don't clear the alert just to make the screen pretty. Leave the alerts on the 1999 Toyota 4Runner so service can see what you saw. Then you'll know the next fork. Any freeze-frame data saved? Not trying to scare you — just skip the expensive first guess. Might be overthinking it, but I'd rather overthink than overspend.

OP update: scanned the 1999 Toyota 4Runner again and still only have the one pending code, no new lights. If the story changes I'll post the new data.

Don't clear the alert just to make the screen pretty. Leave the alerts on the 1999 Toyota 4Runner so service can see what you saw. I'd do that before spending real money. Happy to compare notes if your setup is different. I'll update if anything new shows up.

Charge curves lie if you don't match starting SOC and temp. Match starting SOC and battery temp if you're comparing 1999 Toyota 4Runner charge sessions. That's where I'd start. Just my two cents from doing this recently. This is me being the wet blanket on purpose.

Don't clear the alert just to make the screen pretty. Leave the alerts on the 1999 Toyota 4Runner so service can see what you saw. I'd do that before spending real money. This is from a 1999 Toyota 4Runner in Washington DC. I'd want that in writing, not as a promise. I'd sleep better after that step, even if it finds nothing. Next check is the cheap one I can do in a driveway.