So the back of the car has AC vent and i have no idea how to turn it on. I cant find any button in the back of the car or on my setting anyone mind informing me? Thanks!

 

make sure the little button on the dashboard

it has a vent with a square and an X inside of the square is not on. That means it only gives air to the front and not the back. When it is off, I am not sure, but if someone is there, you will feel air

 

check out this thread too

https://www.clublexus.com/forums/rx-...t-working.html

 

If you are turning off A/C vents in unused rooms of your house
this feature will make perfect sense.

The odd mnemonic I thought of for this is, Think Green
If you want to save energy by not cooling the unused back
seat area then press the S-Flow button and turn the Green
Light on,

If you have guests or ice cream or dogs and need to keep
them cool then just press it and cancel the S-Flow feature.