Warning in Reverse Not Working
07-21-19, 11:30 AM
#1
Driver School Candidate
Thread Starter
Warning in Reverse Not Working
One of the features we have enjoyed the most on our 2014 ES350 was the warnings when shifting into reverse of autos and pedestrians moving into the area. My wife has been complaining that several times she has noticed a pedestrian close to the back of the car and the warning has not sounded. This morning she was driving, shifted into reverse and started backing out. I noticed in the display that someone was 5 or 6 feet from the rear bumper and no warning. Does this indicate a problem with the sensors or some other issue? With the head protectors and various pillars around I have come to rely on the warning system and this gives me pause.
07-21-19, 12:31 PM
#2
Lead Lap
One of the features we have enjoyed the most on our 2014 ES350 was the warnings when shifting into reverse of autos and pedestrians moving into the area. My wife has been complaining that several times she has noticed a pedestrian close to the back of the car and the warning has not sounded. This morning she was driving, shifted into reverse and started backing out. I noticed in the display that someone was 5 or 6 feet from the rear bumper and no warning. Does this indicate a problem with the sensors or some other issue? With the head protectors and various pillars around I have come to rely on the warning system and this gives me pause.
My best guess would be that the sensors are not working as they should. I would do a test by putting the car in reverse, holding it stopped, and walking behind it.
07-21-19, 02:32 PM
#4
One of the features we have enjoyed the most on our 2014 ES350 was the warnings when shifting into reverse of autos and pedestrians moving into the area. My wife has been complaining that several times she has noticed a pedestrian close to the back of the car and the warning has not sounded. This morning she was driving, shifted into reverse and started backing out. I noticed in the display that someone was 5 or 6 feet from the rear bumper and no warning. Does this indicate a problem with the sensors or some other issue? With the head protectors and various pillars around I have come to rely on the warning system and this gives me pause.
All you have to do to turn on Blind Spot Monitor is push the BSM button that is located right under the outside mirror controls or your left knee if you’re sitting inside the Lexus ES.
Blind Spot Monitor in the Lexus ES.
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Lexus376 (04-24-20)
07-21-19, 04:05 PM
#5
Lead Lap
Just to be sure, have you checked that the BSM is turned on? The Blind Spot Monitor System with Rear Cross-Traffic Alert can be turned off with the push of a button—a benefit for certain driving conditions or when the vehicle is towing a trailer.
All you have to do to turn on Blind Spot Monitor is push the BSM button that is located right under the outside mirror controls or your left knee if you’re sitting inside the Lexus ES.
Blind Spot Monitor in the Lexus ES.
All you have to do to turn on Blind Spot Monitor is push the BSM button that is located right under the outside mirror controls or your left knee if you’re sitting inside the Lexus ES.
Blind Spot Monitor in the Lexus ES.
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jollick (07-22-19)
07-22-19, 08:24 AM
#6
Be aware that we are discussing two different systems with two entirely different technologies.
1) The Park Assist is a proximity warning that uses the dime sized sensors on the bumpers.
When an object large or small is within the > 5 foot range it chimes and continues to chime until
you and the object separate. Check to attached Owner's Manual chart for the ranges.
2) The Blind Spot Monitor only works at speeds above 15 MPH going forward but the sensors
mounted under the rear bumper end cap covers will detect the motion of large objects passing by
when you are in reverse at any speed. The difference is that if the passing large object stops
moving the alert chime stops. As others have mentioned, be sure you have not inadvertently
tapped off these systems while intending to open the trunk or gas door.
1) The Park Assist is a proximity warning that uses the dime sized sensors on the bumpers.
When an object large or small is within the > 5 foot range it chimes and continues to chime until
you and the object separate. Check to attached Owner's Manual chart for the ranges.
2) The Blind Spot Monitor only works at speeds above 15 MPH going forward but the sensors
mounted under the rear bumper end cap covers will detect the motion of large objects passing by
when you are in reverse at any speed. The difference is that if the passing large object stops
moving the alert chime stops. As others have mentioned, be sure you have not inadvertently
tapped off these systems while intending to open the trunk or gas door.
07-22-19, 08:41 AM
#7
Lexus Champion
Mine (in my GS and my Highlander) has always been inconsistent in detecting pedestrians. I assume it has to do with their physical size and perhaps what they are wearing. I assume it's the same for the ES, but my GS manual makes it clear it is only for detection of vehicles and may not detect pedestrians. I'm not convinced there's anything wrong with the OP's.
Since it is radar based, it needs to "bounce back" the signal. It's unlikely to bounce back unless they are very reflective (
) or perhaps pushing a shopping cart.
From my GS manual:
Since it is radar based, it needs to "bounce back" the signal. It's unlikely to bounce back unless they are very reflective (
) or perhaps pushing a shopping cart.From my GS manual:
The Rear Cross Traffic Alert functions when your vehicle is in reverse. It can detect other vehicles approaching from the right or left rear of the vehicle. It uses radar sensors to alert the driver of the other vehicle’s existence through flashing the outside rear view mirror indicators and sounding a buzzer.
The Rear Cross Traffic Alert function is not designed to detect the following types of
vehicles and/or objects.
● Small motorcycles, bicycles, pedestrians, etc.*
● Vehicles approaching from directly behind
● Guardrails, walls, signs, parked vehicles and similar stationary objects*
● Vehicles moving away from your vehicle
● Vehicles approaching from the parking spaces next to your vehicle*
● Vehicles backing up in the parking space next to your vehicle*
*: Depending on conditions, detection of a vehicle and/or object may occur.
vehicles and/or objects.
● Small motorcycles, bicycles, pedestrians, etc.*
● Vehicles approaching from directly behind
● Guardrails, walls, signs, parked vehicles and similar stationary objects*
● Vehicles moving away from your vehicle
● Vehicles approaching from the parking spaces next to your vehicle*
● Vehicles backing up in the parking space next to your vehicle*
*: Depending on conditions, detection of a vehicle and/or object may occur.
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Lexus376 (04-24-20)
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JDR76 (07-22-19)
07-22-19, 03:34 PM
#9
The Blind spot monitor and Rear Cross Traffic Alert operate together as part of the same system. The Blind spot monitor does start working at 15 mph, but the Rear Cross Traffic Alert works at low or even no speed whenever the transmission is in reverse. I presume, if the Blind spot monitor is manually turned off, it also turns off the Rear Cross Traffic Alert.but I never tried that.
The Park Assist is a separate system as mcomer previously pointed out.
The Park Assist is a separate system as mcomer previously pointed out.
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Lexus376 (04-24-20)
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