I have a 22 and a 23 RX350. I can say the “auto pilot” mode on the 23 is much smoother and effective than the 22, which I’m told is due to higher resolution cameras that are used to define the roadway.

On long drives in my 22, I can motor the steering wheel adjustment down slightly so I can touch it with my knee. That satisfies the “hands on the wheel” requirement. I tend to test hands on the wheel in traffic, but I’ve actually gone 2-3 hours at a time with this feature on and no problems.

 

I do not believe there are sensors on the steering wheel. I am pretty sure the RX is looking for any of your input to the steering system as slight as it may be.

 

@CAPTBob ..i never knew the car had lane change assist.. I have to try and find this...

 

Negative- I’ve gone as long as two hours at 70+ mph without touching the steering wheel at all- I just touch the bottom of it with the top of my knee. I can feel the wheel moving on its own accord as it drives itself.

 

Can always tape water bottle or something to bottom of wheel

 

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Traffic jam assist lets you be hands free under 30kmh or something. It requires the drive connect subscription and in Canada only available on the higher trims.

 

I plan to change a better looking Retrofit steering. Can any one here able to tell if I do so, the adaptive lane departure features still working as per normal without any sensing errors? Thanks.

 

Zero issues. I do keep my hands ready, especially when around traffic or in turns but everything works flawlessly.

 

which mean to change a retrofit steering wheel doesn’t lead any errors or malfunctioned when activating the lane departure assists feature right? Thanks 🙏🏻

 

FYI, my neighbor 4 houses down is one of the managers of the Toyota/Lexus USA advanced driver assistance systems at the Ann Arbor Toyota Tech Center. In response to a question from me he said that a torque sensor in the power steering system senses whether your hands are on the wheel.
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So when traffic jam assist kicks in and takes you to a dead stop, when does it the RX accelerate again. I couldn't wait for it yesterday.

 

Yesterday, when driving through Connecticut on our way to Boston to see our son for his 30th birthday, we encountered heavy traffic that triggered the Traffic Jam Assist function.about 3 or 4 times. The car accelerated by itself from a full stop when the car in front started moving and got about 25 to 30 feet in front of us. If traffic started moving faster than Traffic Jam Assist would accelerate the car to, I just used the accelerator to keep up with traffic and then set a new adaptive cruise control speed.

 

If YOU can 'feel it', the car has just felt YOU! There are NO sensors in the steering wheel. That's nonsense.

 

I was driving down a residential street and it seemed like the car was pulling to the left in a curve. So I took my hands off the wheel, and the car went around the curve, straightened out and went around another curve all by itself !! I was going 35 mph with cruise control on.. After about 90 seconds I heard a beep and the speedometer screen said something about driver's hands not detected on steering wheel.
Anybody have anything like this happen?