Need to re-calibrate sensors after lift and new tires?

Once I put my 3in lift on with 285/75R16 tires and wheels, would I have to re-calibrate my adaptive cruise control, lane departure, and speedometer? Or any other sensors for that matter?

 

I didn’t calibrate anything when I installed a Pro grille which lowered the sensor a few inches. I didn’t notice any difference and it all seems to be working fine.
Speedo won’t change with any height lift; unless you change tire size.

 

I think the speedometer is all you have to recalibrate.

 

But some owners do have to do the zero point calibration after a lift

 

You don’t HAVE to do any of that stuff. But if you want accurate speed and distance you should do that.

TSS probably okay as long as the truck angle is not ridiculous.

 

Some people have to calibrate and some don’t. You won’t know for sure until after your lift is done. I hear most people won’t need tobut just a heads up, some people do.

 

I keep reading about how the TSS can be recalibrated. Does anyone know exactly how that can even be done? I'm pretty sure it's not designed to work like an AESA on an F-22.

 

I do want my speedometer to be accurate but I can live without the others lol.

 

From what I gather, yes you should recalibrate. Anytime you do an alignment you should recalibrate.

Some alignment shops are getting the calibration tool (more like a whole setup), otherwise you have to go to a dealer and take your chances with them having you sign a waiver.

 

My question remains about how that can be done. Pretty certain the TSS cannot be electronically steered like an AESA. I'm beginning to think it's a BS response that someone made up.

 

Recalibrate with an alignment? Whaaaaaaaaat? That makes no sense

 

Recalibrating vsc and the tss sensor may be needed after the lift is installed.

 

I have a 2017 and just put 265/70r17 on it this week. Can the speedo and odometer be recalibrated and how?

 

AFAIK the only way to do this is add an aftermarket module from Hypertech.

Other solutions?

 

You have to setup radar targets (triangle or square I've read) in certain locations then use a scan tool.
Never done it, don't know much about it, but I can take an educated guess.

Those points probably represent a square "cone of vision" that tells the car sensor what to pay attention to. You can ignore any data outside said cone to prevent false positives (a car braking in the next lane). The cone can probably change depending on stuff like steering wheel angle (why you should get Recalibration after alignments), and all the other pitch/roll sensors that we already have (they're not just there to look cool on your rock crawl screen).

The physical sensor doesn't change, it's got a wide operating angle and software limits sensitivity from calibration. That's why you don't immediately die the second you put a fridge in your bed or go downhill on a left turn, the software can accomidate the changes in angles.

That's why I call bullshit on Toyotas response to the water intrusion recall. A 2 inch lift, or a half inch increase in tire size won't prevent it from being calibrated. There's proof in some dealers just doing it already.

Again, could (probably) not have a full understanding of the system, but you calibrate speed sensing signs with tuning forks. This stuff isn't rocket science.

 

Pretty sure it's a techstream thing. Carista app might have it also have it, but not sure.

 

So it could be done at the dealership?

 

Pretty sure it can, just be prepared to pay.

 

I have a guy in service that I've dealt with for years, maybe he won't bust my head too hard.

 

Yes. Also anytime you remove your grill. Or put a cover on the sensor itself (see Toyota recall), you should recalibrate. Being off a tiny smidge has real world distances 50-100ft out. Big differences.

That's why it annoys me when people bow to dealership pressure and replace their stock grill to get the recall done, then remove and reinstall their pro grill. They're unknowingly putting themselves at risk. Luckily tolerances are pretty big, no ones died that I know of yet, but it's Toyota encouraging people to do stupid things because of liability BS.

More than you ever wanted to know about calibration:
https://airprodiagnostics.com/adas-sensor-calibration-increases-repair-costs/