ChiLina

Hi, could you help me to solve bsm problem?
I have 2014 Lexus RX.
Today after short drive ( it was moderate rain) bsm lighted up constantly.
later today while driving out of garage, I had bsm malfunction and AWD malfunction warning signFigured out it was system electrical problem. Checked battery - it was ok. Disassembled battery terminals , found out they were rusty , cleaned them nicely. Reattached battery.
All works now except for bsm
No warning lights.
Attempts to push bsm button don't change anything - it simply does not light up. No error messages either.
wonder if the fuse is dead?
Probably need to buy techstream CD and cable from Amazon?
Any suggestions would be greatly appreciated


Lina from Chicago

Buzzer777

Try cleaning the button sensors located on the front and rear bumbers. You might have to use some alcohol, and that will remove wax so use it sparingly. Pay particular attention to those on the rear bumper passenger side. Mine required 2 cleanings about 3 days apart for some reason.

ChiLina

Thanks a ton!!!
It worked!
I did try some cleaning without alcohol before, it did not work. Alcohol made the trick!

JETMIKE007

I'm pretty sure the button sensors are for the parking assist feature. The blind spot sensors/detection units are not visible and located under the bumper corners, one on each side.

footnote22

Try leaning your head against the driver's side window and adjusting the driver's side outside rearview mirror so you can just see the side of the car. Then lean in the other direction so your head is over the center console and adjust the passenger side outside rearview mirror so you can just see the side of the car. This virtually eliminates the blindspots though you will not be able to see directly behind your vehicle--use the inside rearview mirror for that. This technique takes a little getting used to but I believe it is the proper way to use your outside rearview mirrors though very few people know the trick. I keep my mirrors adjusted this way despite having blind spot monitoring on my car. This works on any vehicle, not just the RX.

Buzzer777

IDK, but I found the "fix" here, and it fixed my BSM problem.

Non

You're not alone, this is how I adjust my mirrors too. I think it eliminates the blind spots, because as a car is passing me, I can see it's front in my side mirror, before it's back disappears from my rear view mirror, and then I can see it's front from the corner of my eye before it's back disappears from my side mirror. As an added bonus, at night, I don't see the bright lights of cars behind me reflected in the side mirrors. I like adjusting my mirrors this way, but I think going the traditional way is also fine, and safe, just turn your head before you change lanes

Raoul

Sorry, but I always want to see a piece of the car when I glance in the mirror as a point of reference. Blind spot monitor kicks in for the rest.
It's too easy at the grocery store or other parking lot for someone to bump my mirror out of wack.
If a small part of the car is not in the reflection then I know something is amiss.
If I got used to not seeing any part of the vehicle in the mirror at a glance I wouldn't know when the mirror was pointed to tim-buck-too.

Do what you will but my last accident was in 1973.

Slapchop

Is there a fuse for the BSM system. I have check BSM system. If one radar sensor goes bad does it disable all? Is there a way diagnose it accurately. Don want to pull rear bumper cover needlessly.


Thanks much!

Clutchless

There are 2 fuse boxes and both have labels identifying each fuse and what it protects inside the covers. There is one fuse box under the dash to the left of the steering wheel. Lay on the floor and look up.
There is another under the hood on the driver side.

Also look at these older threads regarding blind spot monitor issues:
​​​​​​https://www.clublexus.com/forums/rx-...t-working.html

​​​​​​https://www.clublexus.com/forums/rx-...-function.html

salimshah

Fuse is an easy check so why not.

But, I think the shop is going by most likely failure point.

The question that I would ask is which bumper and how do they know they are pulling the right bumper? Either they are going by some fault message or have done some measurements.

Please share what you find out.

Salim

Slapchop

The shop is the failure point?? What?

The detectors are in the rear bumper.

Slapchop

Yes I know where the fuse boxes are. Was wondering if anyone knew which one. As Icant find any listed for the BSM system.

Slapchop

You are correct. They are under the rear bumper cover. Radar modules.

Slapchop

Not the correct video. Those are different sensors.