(TLDR) How can you easily disable traction control and stability control in a Lexus without stopping the car? (specifically a 2015 RC F)

I haven't seen this topic discussed much at all, so I wanted to start a thread I hopes of finding someone who knows more about this somewhat hidden information.

Nope, I am not referring to "Expert" mode - This mode still extremely restrictive, despite many saying that it opens up the car's abilities, it's apparent if you've ever driven a car with a true TC off-switch. The only way I've found to truly disable traction and stability control is by performing the "pedal dance".

For those unfamiliar, the following process must be completed within a short period after starting the engine:

• Start car (E-brake engaged) (regular brake engaged to start, then can be released)
• Depress foot brake 2 times - Holding it down the 2nd time
• Release ebrake, depress it - release it again, depress it
• Let go of the foot brake and depress it 2 more times
  • TC lights will then turn on

(FYI, there are some conflicting instructions online, the car does NOT need to be at operating temperature & the brakes only need to be pressed twice, not three times - I just made sure)

My qualms with the pedal dance that I want a solution for:
1st - It only works right after the car is started & in park - I want to be able to flip the TC off while I'm driving down the road.
2nd - The car has to be turned off to turn the TC back on - Needing to pull over, stop the car, and turn it back on is ridiculous. Why wouldn't a standard on/off switch work?
3rd - It's a hassle - I can live with needing to stop the car, but needing to jab the pedals like a madman gets real old real fast
4th - "Expert" mode is anything but that - I know how to drive, I don't need the car to try to convince me I can handle oversteer by cutting 90% of the power and throwing a yellow "expert" badge on the instrument cluster. I'd like to turn off TC when I want, then turn it back on in case I hit an oil slick or whatnot.

Are there any experts out there that know more than I do? Does a modification to the car's computer exist that can do this? Is there a secret button combination that can do the same thing as the pedal dance?
Any info or discussion is welcome!

It is like that due to liability concerns. The 'Expert' mode is infamous as Clarkson was trying to drift in a mode totally meant for it as it cuts power to correct the course as soon as it sees excessive amount of yaw. It is meant to allow only slight tail-out attitude before it kicks in.

You might want to reach out to Tuned by Loi on Facebook and I am sure he can create a method using button to activate the full traction control off.

Sorry I'm still laughing at the thought of thinking you'd have the reflexes to "turn on" traction control if hitting an oil slick AND the car could react fast enough to actually do something about it.

If traction control is kicking in regularly on normal street driving, then something is broken. Either tires are trash, driving way too fast for the conditions, or the driver needs to take the bus.

Disabling fully makes sense for specific situations, none really being "on the fly" where you can't take a moment to put the car into the correct mode. At least these cars have a pedal dance option. On older cars I had to wire in a momentary switch that would cut power to the yaw sensor in order to fully disable traction control. Used mainly for drifting or doing donuts in snow covered parking lots. Still had to shut the car off and restart it to enable TC though, similar to the pedal dance method on the F.

Jeremy's segment is very relatable, but I'm glad he did it because it's probably one of the reasons we can get these cars so cheap!
I'll reach out to Tuned by Loi, thanks for the recommendation!

Hahaha, don't worry, I'm not that ignorant!
I'm referring to more of a "fun switch" that I can turn off TC for the very small % of street driving where I don't want TC interfering, then turn it back on once I'm done.

You probably already tried this/know about it, so apologies if this seems somewhat redundant, but when you’re referring to TC off, you’re talking about pressing and holding the TC off button for a few seconds, right? The reason I ask is there are two versions of TC off. The first is a simple press and the other is press-and-hold. Thought it important to clarify what we’re talking about.

From my understanding the peddle-dance completely disables all computer-based body control mechanisms, which is generally not what anyone should want outside of someone doing diagnostics and engineering on a test car.

From my (admittedly small) personal experience at LPDS, they only had traction turned off using the button during the skid pad portion and there did not seem to be an issue with power cut due to too much yaw. This was evidenced by how quickly it was possible to flip around and the fact that there were a small handful of other people successfully drifting around a cone there lol. Those were all 2020+ RC F’s, so I suppose it’s certainly possible the behavior may have been revised for the facelifted model.

I've noticed the ability to do this, but haven't given it a try. Next time it's wet out I'll mess around and get back. Thanks for the idea!

Well, I think you've found the answer good sir! Holding down the TC button for 3 seconds seems to give the same driving characteristics as the pedal dance, without all of the annoyance, thank you! This should be more common knowledge.

Funny how in S+ mode, once you press the TC button the "expert" badge appears, then after holding 3 seconds the "expert" badge disappears and TC lights remain illuminated - Almost like car saying, "okay, you actually know what you're doing"

Oh I could have told you that. I have done it many times, but I believe pedal dance removes almost all of VDIM while the 3 second button still will pull power back (at least, in my experience). When I did some launches for Dragy a few years ago, even with the 3 seconds holding the button down, it felt like the engine power was being held back for the first few split seconds before all of the power suddenly comes rushing in. My 60 foot never got better than 2.09 seconds because of that when I think I should be able to do under 2 seconds

I might be wrong, but I think holding the button down for 3 seconds, will still have some very loosened version of VDIM still monitoring.

Noted. I only got the chance for 1 slide, so I'll have to take it though it's paces doing the 3 sec hold & pedal dance side-by-side at a later date.