Odd voltage behavior observed

I have not observed this for the two weeks I have owned my 2022 Limited non hybrid.

I have a short video I took, but it was rejected by the site for not allowed extension from my iPhone. Maybe I can try to convert it later on my computer.

It is seating between 35&65 percent on the gauge. Like 12.5-15.5 volts

is this normal ?

 

Have that as well, Strange. Seems due to the engine start/stop with the EPS battery.

 

Normal, fluctuating from charge to not charging. Especially when it gets colder out and you use the stop/start.
Charges more with no engine load when coasting, stops when idling.

 

Wow. Glad to see this being normal appearing. I don’t use the stop/start. I installed a the module inline to the switch to default to off at startup. But it has become cooler now here.
Thanks for your inputs.


Mike

 

I bypassed the auto start/stop as well.
Charge voltage fluctuates as described earlier with or without it.

 

I guess in the 16 days of ownership, this is the first I have observed this behavior. There is a lot to learn and realize with this truck. So much technology for this old fart. lol


Mike

 

lol, just don’t start watching the oil pressure fluctuations …

 

All smart alternator are functioning this way, charge battery on brake/deceleration to help mpg

 

now now

I don’t know whether to laugh at that or not. I didn’t know about the extent of the motor issues until after my purchase. I was originally looking to get a V8 used Tundra. This was at the dealer the day I went in to see what they had used. It was during the purchase procedure that I realized problems with the motor reliability. And post signing I find out they are seizing up while driving and all. I have an $80K show Buick that I haul around at times, and an RV that my wife and I were looking to go traveling with. Now I’m not sure I made the correct decision. I have a good feeling it will be made right by Toyota, but don’t want to have something happen while out on the road who knows how far from home.

Mike

 

The oil pressure fluctuations are normal too. To quote the famous Breathing Borla, don't worry about it and boost on!

 

As @Smauryan said, this is absolutely normal. The alternator is controlled by the ECU. This type of charging system has been dubbed the "smart" alternator. It was designed to help increase MPGs. Here is a link that does a good job of explaining how it all works: https://www.redarcelectronics.com/u...ators-faqs/smart-alternator-fixed-alternator/.

 

Laugh. It is another normal gauge operation.