12v battery failurep

[Herbie]

37 minutes ago, WillOz said:

Yes it was total power draw. All I could tell was that something was drawing power and I was surprised that the camera seemed to. It is one thing for the door security system to be active but the camera? Still as long as we know...

So really you're just guessing that it's the camera that's drawing the power?

Your meter in that photo shows a draw of 560mA when it should really be about a tenth of that. My quiescent current draw is no more than 70mA and that includes the dashcam in parking mode.

Some fuses feed more than one piece of equipment and more than one circuit. Given your figures I'd say you almost certainly have a fault somewhere and you need to do some proper diagnostic testing to find exactly what and where it is. Alternatively, being as it's a 2020 car and presumably still under warranty, get it back to Lexus for them to sort it.

[ColinBarber]

According to the workshop info the camera heater shouldn't be operating when the ignition is off.

 

[rayaans]

I think the system is designed just fine. Bear in mind my Battery issues on the IS300h started when the car was 7 years old and it has 20k miles on it so it was a vehicle driven over short distances averaging around 2k a year in our ownership. We did go on holiday to India for 3-4 weeks at a time and it started up fine too.

The other thing to be wary of on the new Lexus models is connected services - its been draining the Battery on the UXe in 2 days despite being driven normally. Turned it off and its been fine ever since. 

[WillOz]

Hi Herbie. No, I'm not assuming the camera is drawing all the power, I was just trying to eliminate the current drain. It just surprised me that the camera was drawing power when it couldn't be of use. If you were going to drive you would need to defrost the screen anyway. Thanks Colin/Herbie it does seem it needs checking out. In the meantime smart charge every so often.