UX250h 12V battery died
Thread Starter
Driver School Candidate
Joined: Jan 2021
Posts: 1
Likes: 0
From: Ontario
UX250h 12V battery died
Our UX 250h died and had to be towed to the dealer (it was 3 weeks old). The battery (12V) did not pass its load test, AND Lexus updated the phone home software which was draining the battery. Only recently discovered, I am told.
Our car was totally dead, (they said) because of the combination of buggy software, and an iffy 12V battery.
Working great now!
Our car was totally dead, (they said) because of the combination of buggy software, and an iffy 12V battery.
Working great now!
Racer
Joined: May 2016
Posts: 1,266
Likes: 379
From: Illinois
Good heads up, I know another user had a post about his UX's 12v battery drain issue. Not sure if it was related to this in the end
Knock on wood, my '19 250H hasn't had this issue so I'm hoping nothing comes up.
Knock on wood, my '19 250H hasn't had this issue so I'm hoping nothing comes up.
Lead Lap
Joined: Nov 2013
Posts: 4,273
Likes: 1,213
From: IL
Quick review of Hybrid batteries, the 288vdc "traction" battery that powers the two Motor Generator MG units is
unlikely to ever go completely dead, unable to spin the Internal Combustion IC engine. The 12vdc Lead Acid battery
we are accustomed to needed to be large enough to start the IC engine and run everything else. With the Traction
Battery doing the heavy lifting, starting the IC and moving two tons of car up to 40 MPH (try pushing your car that fast!)
all the 12vdc battery is required to do is close a relay to start the IC and stabilize the voltage for the radio and lights.
All this to remind you that the Aux battery is much smaller than we are used to and will not run the radio (and computers)
for hours before running down.
unlikely to ever go completely dead, unable to spin the Internal Combustion IC engine. The 12vdc Lead Acid battery
we are accustomed to needed to be large enough to start the IC engine and run everything else. With the Traction
Battery doing the heavy lifting, starting the IC and moving two tons of car up to 40 MPH (try pushing your car that fast!)
all the 12vdc battery is required to do is close a relay to start the IC and stabilize the voltage for the radio and lights.
All this to remind you that the Aux battery is much smaller than we are used to and will not run the radio (and computers)
for hours before running down.
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diamondmit
GS - 2nd Gen (1998-2005)
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Apr 2, 2009 02:17 PM
