450H 12v battery issues
09-16-22, 09:29 AM
#32
Why oh why does Toyota resist Apple so hard. Supporting this would solve the phone battery, Bluetooth flakiness problems and MAYBE some of the car battery drain issues (yes, it would not help Android users...): https://support.apple.com/en-us/HT211234
09-16-22, 09:37 AM
#33
Only BMW has digital car key support.
Have the feature, but don't use it. Just the fobs.
Why oh why does Toyota resist Apple so hard. Supporting this would solve the phone battery, Bluetooth flakiness problems and MAYBE some of the car battery drain issues (yes, it would not help Android users...): https://support.apple.com/en-us/HT211234
Why oh why does Toyota resist Apple so hard. Supporting this would solve the phone battery, Bluetooth flakiness problems and MAYBE some of the car battery drain issues (yes, it would not help Android users...): https://support.apple.com/en-us/HT211234
09-16-22, 09:48 AM
#35
Excellent. The auto manufacturers don't know what they don't know.
It's just a matter of time before user profiles are stored on phones and ported to whatever car you get into.
It's just a matter of time before user profiles are stored on phones and ported to whatever car you get into.
09-16-22, 10:06 AM
#36
Just a point I wanted to add.... There are two battery systems in a 450. One is a traditional 12V with the battery located in the trunk and the other is the 18 amp power plant for movement located in the floor and rear.
In terms of the 12V there should be no difference between the 450 and the other NXs. If anyone has a drain so severe that the battery is dead after several days I suggest taking it to the dealership ASAP and ask where is the drain. They can check at test points the drain load to determine what is using the power. The battery could be bad - but I doubt it, Toyota uses good suppliers. It wouldn't surprise me if there is a setting in a component or in the software that is keeping the car "operational" in way that is consuming power, which should be expected in a brand new model revision.
I nightly lock my 450 and remove the key and fold the mirrors and I have had it since Jan, in all sorts of weather and have left it alone for up to three weeks and never had any battery warnings or drain. But each time I lock the car, fold the mirrors and I don't check the app. I am mentioning this because maybe leaving a car unloaded or a key inside causes something a designer or engineer didn't think of.
I personally would find it unacceptable for a car to need to be plugged in for the 12V each night.
In terms of the 12V there should be no difference between the 450 and the other NXs. If anyone has a drain so severe that the battery is dead after several days I suggest taking it to the dealership ASAP and ask where is the drain. They can check at test points the drain load to determine what is using the power. The battery could be bad - but I doubt it, Toyota uses good suppliers. It wouldn't surprise me if there is a setting in a component or in the software that is keeping the car "operational" in way that is consuming power, which should be expected in a brand new model revision.
I nightly lock my 450 and remove the key and fold the mirrors and I have had it since Jan, in all sorts of weather and have left it alone for up to three weeks and never had any battery warnings or drain. But each time I lock the car, fold the mirrors and I don't check the app. I am mentioning this because maybe leaving a car unloaded or a key inside causes something a designer or engineer didn't think of.
I personally would find it unacceptable for a car to need to be plugged in for the 12V each night.
09-16-22, 01:13 PM
#37
Big data.
There is giant money, influence and control in data.
The big data companies can be difficult to work with once they are in your business.
I work in software and I'd be uncomfortable if I were any large manufacturer. Don't think they have much choice though.
There is giant money, influence and control in data.
The big data companies can be difficult to work with once they are in your business.
I work in software and I'd be uncomfortable if I were any large manufacturer. Don't think they have much choice though.
Last edited by scooky; 09-16-22 at 01:20 PM.
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Kusala (09-16-22)
10-05-22, 09:04 AM
#38
I don’t know if this will help anyone in this thread, but I have had my NX 450h+ since July and the battery has completely drained twice. Leaving it parked 2.5 days would cause the battery to die.
After a lot of investigation, I found the culprit. As part of my purchase, the dealer required I purchase accessories (it was a bs “instead of a market rate adjustment” deal) one of those accessories was an aftermarket dashcam (FineVu GX300) it turns out the dashcam was essentially not fully turning off (even though it was set to turn off x hours after being parked) and was consistently draining the battery. (The dashcam records the current voltage on the footage so looking at the clips I could watch the battery drain)
I took it back to the dealer that installed it and they said the dashcam was faulty and replaced it with a new one (same model) and replaced my 12v battery as it was now testing bad.
Hopefully this issue is resolved. I have left my car parked at my house for 24 hrs so far and will check the voltage later this afternoon to see if this new camera is draining as well. Wish me luck!
After a lot of investigation, I found the culprit. As part of my purchase, the dealer required I purchase accessories (it was a bs “instead of a market rate adjustment” deal) one of those accessories was an aftermarket dashcam (FineVu GX300) it turns out the dashcam was essentially not fully turning off (even though it was set to turn off x hours after being parked) and was consistently draining the battery. (The dashcam records the current voltage on the footage so looking at the clips I could watch the battery drain)
I took it back to the dealer that installed it and they said the dashcam was faulty and replaced it with a new one (same model) and replaced my 12v battery as it was now testing bad.
Hopefully this issue is resolved. I have left my car parked at my house for 24 hrs so far and will check the voltage later this afternoon to see if this new camera is draining as well. Wish me luck!
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lsft (10-05-22)
10-05-22, 05:21 PM
#39
I think this is actually a great thing to point out! With all the dealer add-on BS happening these days, it’s entirely possible that one of them was poorly installed and/or faulty - definitely worth taking a look at if your vehicle had any extras installed by the dealership that are not original equipment!
Good luck!
Good luck!
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nx450plus (10-05-22)
10-10-22, 02:59 PM
#40
They finally sorted mine out. They said something was missing from the puddle lamp in the trunk, causing it to overdraw power from the 12V battery. Unfortunately, the battery had to be replaced it was testing bad. I didn't have to pay anything out of pocket since it was all covered under warranty.
I got to drive a UX loaner and IS350F. Man, that IS is so nice; keeping an eye out for that fully electric IS.
I got to drive a UX loaner and IS350F. Man, that IS is so nice; keeping an eye out for that fully electric IS.
10-11-22, 07:48 PM
#41
I was setting up the Mrs profile on ACC; timed out; turned ignition on; got a message "parking brake unavailable, see dealer." Then, weird things started happening... "12V" system dropped to ~7V. Everything stopped working. Tried charging (V so low my 4A charger defaulted to 6V battery), tried "jumping". Sounded like something was still drawing power... heard a buzzing near the top passenger side of the ICE in the area of the VVT.
Called dealer; they said call roadside to bring it in (from my garage). Driver's jumper was able to wake it up enough to drive it on the truck. Haven't heard back.
10-13-22, 10:39 AM
#42
Dead 12v on 2month old NX450h
Anyone else having issues of total 12v power loss on PHEV? Happened twice, first time dealer tested and recharged and fixed for a couple of days. Now waiting on new battery (very rare).
Could it be using just EV most of the time or accessing to car online too often on multiple devices or what?
Could it be using just EV most of the time or accessing to car online too often on multiple devices or what?
I have a 450H that was delivered to me about 2months ago and 5k on the odo. 2days ago i could not enter my car due to dead 12v. Yesterday dealership charged the battery and said i should buy a trickle charger for 175$ which i find a little absurde considering I just dropped 90k on the car 2 months ago. Lexus should really hire some electrical engineers to build in a trickle charger that charges off the main hybrid battery.
10-16-22, 11:05 AM
#43
I have had my NX450H+ since March and installed a “Thinkware dash camera” right away…
.I too experienced a low 12 volt battery after not driving the car for 3-4 days and suspect the dash camera draining the battery. I will be disconnecting the “park mode” on my dash camera.
my issue was with the dealer who misinformed me on how the 12 volt battery charges. They told me the 12 volt battery does not charge when plugged into the level 2 charger or when in full EV drive mode.
Both dealer statements are wrong…. the 12 volt battery most definitely charges when the EVdrive battery is charging or when driving in full EV mode…I had to research the RAVE 4 Prime forum to get this information ( note: Rave 4 Prime is the me running gear as the Lexus 450H +)
I definitely will be adding a trickle charger for longer dormant periods of non driving..
.I too experienced a low 12 volt battery after not driving the car for 3-4 days and suspect the dash camera draining the battery. I will be disconnecting the “park mode” on my dash camera.
my issue was with the dealer who misinformed me on how the 12 volt battery charges. They told me the 12 volt battery does not charge when plugged into the level 2 charger or when in full EV drive mode.
Both dealer statements are wrong…. the 12 volt battery most definitely charges when the EVdrive battery is charging or when driving in full EV mode…I had to research the RAVE 4 Prime forum to get this information ( note: Rave 4 Prime is the me running gear as the Lexus 450H +)
I definitely will be adding a trickle charger for longer dormant periods of non driving..
10-16-22, 11:11 AM
#45
I experienced the exact same problem…when 12 volt battery dies the 450 H + goes bezerk…
could not enter my car even with the manual key inserted into the door….real poor design
had to call roadside assist even though it was in my garage at home….we were finally able to open doors and jump the 12 volt battery.
once we were able to get a ready light I had a check engine alarm and told to take it to dealer ASAP.
dealer confirmed low voltage caused the issue….
could not enter my car even with the manual key inserted into the door….real poor design
had to call roadside assist even though it was in my garage at home….we were finally able to open doors and jump the 12 volt battery.
once we were able to get a ready light I had a check engine alarm and told to take it to dealer ASAP.
dealer confirmed low voltage caused the issue….