zkl2003

Hi guys!

Today, I just realized that when I back the car up, the rare cross traffic alert warning sound is no longer work. I am not sure when it stopped working. I pulled into another parking lot, and I tried again when there are cars passing, the warning is not showing up at all. I checked my BSM, it is on too. Very confused about it. Anyone having the same problem or know how to fix it?

Thanks a lot!

tommytqt

The switch where you adjust side mirrors, make sure you select left or right. Try again. Let me know

jim256

BSM main switch
Pressing the switch turns the system on or off. When the switch is set to on, the switch’s
indicator illuminates and the buzzer sounds. This switch is for both Blind Spot Monitor
function and Rear Cross Traffic Alert function.

It would seem if BSM is working, it should, too. Do you get the flashing mirror indicators for cross-traffic? Could simply be a buzzer issue.

mcomer

Be aware that Park Assist (small disc sensors on the F & R bumpers) is a Proximity Sensor,
when an object is within the 2 - 5 foot range it chimes until either you or the object move apart.

The BSM/RCTA is a motion sensor (hidden sensors in rear fenders), When an object moves into
its 5 - 65 foot range it chimes. If it stops moving but is still near you the warning ceases.

legrunt

I thought that's purely for the "mirror tilt when in reverse" function and nothing to do with RCTA?

zkl2003

Thanks for the tips, let me give a try.

zkl2003

Yeah the BSM is working for sure. and Mirror doesn't flash for cross traffic at all, which it is weird. since it used to work when i am at parking lot backing up. I will go try different things and hope it work again. Thanks for all information.

zkl2003

Yeah it used to work like that whenever i back up in the busy parking lot. and suddenly not working which I am very confused. Since it is a hidden sensors in rear fender, i am wondering maybe problem is the sensor. I will give a try of other way and hope it works

typocl

take it to the dealer

zkl2003

Yea that will be my last option haha. just hope can fix it by some simple step.

tommytqt

The switch for the side mirrors, switch to one side to make this works (left or right does not matter)

JDR76

That's just for the tilt down feature in reverse. It's not connected to RCTA.

zkl2003

WOW! guess what, it works now!!! It was on left, and i just put to right and switched back to left. and it worked now! I don't know how is that even possible, i didn't know that is how to fix it?? haha. thank you so much again.

zkl2003

Yes! i just switch it around and worked! i can't believe it! never know this is how to fix it. Thanks so much

tommytqt

You're welcome. It drove my nut the first time too.