2018 Rogue SV AWD AEB QUESTION

[smetzger]

Hello. I just bought a 2018 Rogue and had questions about the AEB. I picked it up from the dealer on 12.10.21 as a CPO vehicle. While driving it home I purposely would go and tail gaited my wife's vehicle back on the throughway and then back off trying to see how the AEB warning signals and beeps would work. We were never able to get the thing to beep and were wondering what the issue was or if it only works in a true "accident" situation. I have a parking lot I can use at a business so I went there and put two cones out with 5 ft posts in them and put a tarp over the posts to make a barrier of about 4x5 ft and went at it from 5 mph to about 20 mph and the vehicle never braked automatically or beeped. It DOES NOT have the pedestrian warning device FYI.
So I ask the dealer and he said it only works at 30 or 38 miles per hour ??? which to me seems too fast because if I'm going 20 mph and a person slams on their brakes in front of me for say a kid or a deer and I hit them in the back end it will be a lot of damage and costly issue in this day and age of parts and labor. And to bring it to them they said: "if something is wrong then we will fix it but if nothing is found then it's 168.00 and hr on your dime". So my question is how can I test it to see if it really is not working or is ?. And yes I have checked the dash settings and there are check marks on the brake assist icon and there is nothing on the dashboard. And is there a way to make the "blind spot warning" beeps louder ?. I am assuming that the AEB warning is the same and It is very quiet beeps right now. Thank you, Steve

[Rogue One]

Please read this thread: 2020 Rogue - AEB (Automatic Emergency Braking) ?

[VStar650CL]

While driving it home I purposely would go and tail gaited my wife's vehicle back on the throughway and then back off trying to see how the AEB warning signals and beeps would work. We were never able to get the thing to beep and were wondering what the issue was or if it only works in a true "accident" situation. I have a parking lot I can use at a business so I went there and put two cones out with 5 ft posts in them and put a tarp over the posts to make a barrier of about 4x5 ft and went at it from 5 mph to about 20 mph and the vehicle never braked automatically or beeped. It DOES NOT have the pedestrian warning device FYI.
So I ask the dealer and he said it only works at 30 or 38 miles per hour ??? which to me seems too fast because if I'm going 20 mph and a person slams on their brakes in front of me for say a kid or a deer and I hit them in the back end it will be a lot of damage and costly issue in this day and age of parts and labor. And to bring it to them they said: "if something is wrong then we will fix it but if nothing is found then it's 168.00 and hr on your dime". So my question is how can I test it to see if it really is not working or is ?. And yes I have checked the dash settings and there are check marks on the brake assist icon and there is nothing on the dashboard. And is there a way to make the "blind spot warning" beeps louder ?. I am assuming that the AEB warning is the same and It is very quiet beeps right now. Thank you, Steve

I'll double-check it next week when I'm back at the shop, but I'm pretty sure the minimum activation speed is 20mph. That's the same as the minimum for most of the "non-parking" driver aids like BSW and LDW. Tailgating won't cause it to function, it's looking at closing speed delta and not distance to an object. Most people don't realize how quickly an ABS can panic-stop a car, so if you actually want to test it, you'll very likely need to pee your pants.

[smetzger]

Appreciate the info "Rougue one" and would like to know what you find when at the shop "VStar650cl" Thank you

[VStar650CL]

If I don't post back by Wednesday night next week, freshen up this thread to remind me. Memory is the first thing to go in old age, and the second thing is... umm... hmm... patience, it will come to me....

[smetzger]

If I don't post back by Wednesday night next week, freshen up this thread to remind me. Memory is the first thing to go in old age, and the second thing is... umm... hmm... patience, it will come to me....

Hello, I figured I’d give you some time as requested and see what you came up with. Thank you, Steve

[D1dad]

I’m not sure on my wife’s 18 but it’s gone off before. I’m sure she sets that sucker off every time she goes up town. I know it saved me on my 21 in traffic in Chicago when traffic took off then slammed on the brakes. I can’t imagine at the time I was going over 10-15 miles an hour though.

[VStar650CL]

I just found it in the SM and the minimum engagement speed is 5 kph / 3 mph, but it appears it will only "panic brake" at an unspecified higher speed. That makes sense, since hydraulic effort to stop the vehicle at parking lot speeds is pretty small and might be difficult for the ABS to modulate smoothly.

[II Kings 9:20]

Hello. I just bought a 2018 Rogue and had questions about the AEB. I picked it up from the dealer on 12.10.21 as a CPO vehicle. While driving it home I purposely would go and tail gaited my wife's vehicle back on the throughway and then back off trying to see how the AEB warning signals and beeps would work. We were never able to get the thing to beep and were wondering what the issue was or if it only works in a true "accident" situation. I have a parking lot I can use at a business so I went there and put two cones out with 5 ft posts in them and put a tarp over the posts to make a barrier of about 4x5 ft and went at it from 5 mph to about 20 mph and the vehicle never braked automatically or beeped. It DOES NOT have the pedestrian warning device FYI.
So I ask the dealer and he said it only works at 30 or 38 miles per hour ??? which to me seems too fast because if I'm going 20 mph and a person slams on their brakes in front of me for say a kid or a deer and I hit them in the back end it will be a lot of damage and costly issue in this day and age of parts and labor. And to bring it to them they said: "if something is wrong then we will fix it but if nothing is found then it's 168.00 and hr on your dime". So my question is how can I test it to see if it really is not working or is ?. And yes I have checked the dash settings and there are check marks on the brake assist icon and there is nothing on the dashboard. And is there a way to make the "blind spot warning" beeps louder ?. I am assuming that the AEB warning is the same and It is very quiet beeps right now. Thank you, Steve

I set up a cardboard slab from a box using the sides as support about the size of a car in my driveway.

My 2015 Volvo S60 slammed on the brakes and stopped. My 2015 Genesis plowed right through it.

The Genesis claims to have AEB and has beeped on the road but has never braked. Apparently this gen won't detect stationary items.

[VStar650CL]

Different radars respond differently to non-metallic materials. Very good sub-millimeter units can detect cardboard (and pedestrians), but even then the gain is crappy and braking may be late and ineffective. Most of the radars out there today are "traffic" types which won't detect cardboard until they're inches away if they detect it at all. Covering or striping the target with kitchen tinfoil would be a fairer test.

[II Kings 9:20]

Different radars respond differently to non-metallic materials. Very good sub-millimeter units can detect cardboard (and pedestrians), but even then the gain is crappy and braking may be late and ineffective. Most of the radars out there today are "traffic" types which won't detect cardboard until they're inches away if they detect it at all. Covering or striping the target with kitchen tinfoil would be a fairer test.

Did not know that, I thought cameras were involved but the Gen is 7 years old. I will test the genesis against painted cardboard to represent a car. Foil would be unfair since most cars aren't that reflective. Wil foil test if paint fails.

[VStar650CL]

If your Gen is like a 7-year-old Nissan, then the lane cams are used solely for lane keeping and don't play a role in obstacle detection. That task falls exclusively to the radar. Some newer stuff does integrate optics into the obstacle detection, primarily for detecting pedestrians and road debris which the radar has difficulty detecting. Ultra-short wavelength radars capable of ranging cardboard have only existed commercially for a few years, and I'm not even sure if any are being used in cars (at very short wavelengths radar is prone to be "rain blind"). The bottom line is, your Gen is almost certainly dependent on a "traffic wavelength" radar that will only respond to metal.

[smetzger]

Thank you and some interesting information.

So to test it I gather I need to do the cardboard in foil and go at it over Say 3, 5 -10 mph ?. And the Nissan tec guy in New Jersey said 30 or more mph ( which as mentioned is a little crazy imho).

Like I need “Myth Busters” to my car ..

I’d be surprised if I’m the first person that has been wanting to test it.

[VStar650CL]

So to test it I gather I need to do the cardboard in foil and go at it over Say 3, 5 -10 mph ?. And the Nissan tec guy in New Jersey said 30 or more mph ( which as mentioned is a little crazy imho).

Like I need “Myth Busters” to my car ..

I’d be surprised if I’m the first person that has been wanting to test it.

Yah, even a large patch of tinfoil should suffice, say, a foot by two feet. It doesn't take much to generate a radar return, the "chaff" they use to fool radar-guided missiles is basically metallized mylar in strips. I don't know what the minimum operating speed would be for your Gen, since I don't have access to much Hyundai documentation. But it's definitely 3 mph on a Nissan and not 30 mph, that's straight from the Rogue ESM.

So you're being a Mythbuster, not needing one. I think it's very cool.

[smetzger]

The 3 mph is for the Forward Collision WITH the pedestrian feature.

Mines not equipped with pedestrians part of it.

Sooo that’s back to the “ what speeds it work at” ?.

[VStar650CL]

You may need to figure that out empirically. I.e., start busting!

[casperfun]

The 3 mph is for the Forward Collision WITH the pedestrian feature.

Mines not equipped with pedestrians part of it.

Sooo that’s back to the “ what speeds it work at” ?.

No pedestrian feature for AEB in you’re system? Well throw that out the door for any unfortunate human. You would think it would, I guess it’s no Tesla.

Not that I came close to running over any in the decades of driving.

A rear collision pedestrian feature is a must since all those stories of families backing up into kids in their driveways.

Curious if your particular system can stop before hitting a kid running between 2 cars or retrieving a ball in front of you.

[VStar650CL]

No pedestrian feature for AEB in you’re system? Well throw that out the door for any unfortunate human. You would think it would, I guess it’s no Tesla.

Not that I came close to running over any in the decades of driving.

A rear collision pedestrian feature is a must since all those stories of families backing up into kids in their driveways.

Curious if your particular system can stop before hitting a kid running between 2 cars or retrieving a ball in front of you.

Pedestrians are a tough problem, Casper. Like I explained, no metal. Most of the RAB (Reverse Braking) setups use sonar and not radar for that reason, but reverse speeds are slow and ranges are limited. Even high-powered sonar isn't good past about 50 feet, so for pedestrians in front at higher closing speeds, it's insufficient. That's why the pedestrian feature is a pricey extra, it almost has to be done optically+radar and that means some very sophisticated computer processing and coordination.