So has anyone figured how to turn to engine off and still keep the radio on? The only way I have found to do it is to leave the car in neutral and press the start/stop button but then even when you put it in park the yellow triangle still yells at you. I really can't imagine Lexus would make a car that you can't leave in the accessory position some how...

 

Rewire the infotainment from accessory to another power relay which has always got power when the car is unlocked

 

Turn car off in neutral or drive and then shift to park is the only way I know of. Yellow triangle doesn't bother me.

The only issue with this process is your e-brake will not set automatically.

At least it's not like my infiniti which actually has no way to accomplish this. Super annoying.

 

Yeah, that what I have found out. It just seems like a bad design. I don't understand why there would not have an accessory setting for the ignition system