What exactly isn't working? The audible alert? or it's not correcting itself when it crosses the lane dividers?

 

There aren't any parallel lines indicated on the HUD and no beep when nearing a line on the road.

 

So when you turn on LDA, it should also display on the multi-function display not just the HUD. Do you see the parallel lines on there? the best way to know if its turned on is if you are driving below 32 mph and you turn on LDA it should give you a warning message saying it only works above 32mph.

 

I have the parallel lines and the warning about not working below 32 mph, yet no audible warning.

 

Hmm.. There is no way to turn off the sound from the settings so yeah there might be something wrong with the speaker that the sound is coming from. So when you cross the line and it corrects itself there is no beep beep beep sound, right? You have to take it into the dealer and let them check it out.

 

LDA not working if the car running less than 50 km/H.

 

It isn't working at any km/H, or mpH. Therein lies the problem. Off to the dealer.

 

Did you ever get it working? My Toyota is doing the same thing. All the LDA are set to be on (tried sensitive and normal settings) yet i don't get any warnings or steering assist. It used to work and then all of a sudden I noticed it wasn't working anymore.

 

So the LDA only works when it can detect the lanes. When you turn on LDA, do you see the lanes solid white? If not, then it's not going to warn you or use steer assist. Also, in the MID, you can turn off steering assist and just have the warning. Go into the settings on MID, then LDA, and make sure steering assist is on.

 

Are you driving faster than 32mph in order for LDA to function?

 

Oh yeah, that too, you need to be above 32mph for it to work.

 

RESOLVED...Sorry Everybody. It definitely was a human error. Although all the instrument displays showed the LDA and steering assist were all set as "on", there is a physical button on the left side down low on the dash (beside instrument light dimmer) that i must have hit while cleaning that turns the LDA on and off. I suspect the original poster had the same issue. Problem solved. Thank you everyone for sharing your ideas.

 

Ah, I assumed that you already knew how to turn it on, haha. Glad it works now.

 

This is the button that I didn't notice. It looks obvious but its hidden by the steering wheel while driving. That's my excuse anyway!

 

Ah. Thanks for that! Different car so I don't have to worry, because if someone is gonna hit a switch they shouldn't hit, it's gonna be me. And I totally buy your excuse .

 

Not to jack this thread My 2019 Highlander SE is having a similar issue but there is no physical button. If anyone has any ideas do let me know.
Thanks in advance

 

Not to jack this thread My 2019 Highlander SE is having a similar issue but there is no physical button. If anyone has any ideas do let me know.
Thanks in advance

should be on the steering wheel. the right side. a picture of a car crossing over the right lane.

 

this post just helped me!

 

I have a 2018 Toyota Highlander having similar LDA problems with the LDA adjustment on steering wheel and even setting sensitivity of LDA to “ high” setting and restoring to all original “ default” status Iam still without LDA and both mirrors fail to defect lateral presence of a vehicle. Has someone experienced this problem and if so can it be resolved without taking the vehicle out of warranty to be victimized by the old “ got to diagnose this problem “ BS by the typical dealers.