Merged thread: Automatic Emergency Braking activating for no reason

[Surfdog]

Finally. Had to upload video to Google drive and paste shareable link. Site didn't like adding link from Google photos.

 

[Tig170]

@Surfdog : Wow - well if you didn't have that on dashcam I wouldn't have believed it, I've never had anything like that before on mine (20k miles: I have a very early model, with sensible defaults on start up) - take care bud!

 

[siteguru]

It's said that the radar detector unit is not behind the square block front and centre of the front bumper, rather it is higher up and off to the left side behind the bumper. Is that perhaps why RHD versions of the car may be more temperamental regarding AEB, in that the software was originally designed for LHD models and hasn't been appropriately tweaked for RHD? (Or maybe over-tweaked in terms of sensing angles?)

 

[Surfdog]

It happened in way back from 1st service. Took it straight back to dealer who kept for a day and took for road tests but couldn't find a fault. Would easily have been a rear end shunt if driver behind was a bit close or not paying attention. Had a few of these. I find at speeds below say 15 or 20 mph, brakes will lock instantly. Above those speeds brakes will be applied more gradually. When turning right into my estate I would normally enter a box in centre of road and wait till road is clear but can't do so as entering it, no matter how slowly I do so, will activate AEB if cars are travelling towards me.

 

[JonnyG]

Wow, that was from a long way back from the car in front. I've had similar but at much closer distances (perhaps a car's length).

 

[NLMGSAN]

I think it wasn't the car ahead. It was the small Fiat that provoked AEB.

 

[GrayCat]

I think:

rain ( ==> water drops on the windscreen in front of the camera)
+ light from Fiat headlamps
====
...gave "bad" image to the camera, it couldn't recognize the situation, and produced a command to Stop!

 

[Ian Key]

I think it detects the direction the front wheels are pointing. So if you have them slightly turned to bring you towards the centre white line the car thinks you are going to continue with that turn and into the oncoming traffic.

I've found if I'm going to overtake a parked car and keep the steering straight until the oncoming traffic has cleared there is no emergency braking even if I'm still moving slowly. But if I've turned the steering in anticipation of going around the parked vehicle and still moving it slams the anchors on.

 

[JonnyG]

I think it wasn't the car ahead. It was the small Fiat that provoked AEB.

Yes, that makes more sense on second viewing ?, plus the above comments plus the right indicator was also on ? .. so the car might also think a right turn was imminent ?

That happened to me once when turning right into a side road, however I was crawling in a separate right turn lane and was judging when an oncoming car would pass but the car obviously had a different opinion to me ?

 

[OriginalBigAl]

The major problem with these modern systems is that they are made to pass specific tests in a controlled environment. On the road there are too many variables which will the algorithms cannot cope with , and so will fire off a signal to the braking control unit once parameters have been passed even though we think it everything is fine and dandy. This makes us mistrust the car and question whether its fit for purpose? So we either live with it or as we presently can, turn it off . As more of these cars come onto the roads , we are going to see more of these incidents take place, some right in front of us, so we are going to leave an extra few metres gap to the car in front. ( just in case ). Maybe that's what the powers that be wanted in the first place and this is a roundabout way of achieving it.

 

[NLMGSAN]

The major problem with these modern systems is that they are made to pass specific tests in a controlled environment. On the road there are too many variables which will the algorithms cannot cope with , and so will fire off a signal to the braking control unit once parameters have been passed even though we think it everything is fine and dandy. This makes us mistrust the car and question whether its fit for purpose? So we either live with it or as we presently can, turn it off . As more of these cars come onto the roads , we are going to see more of these incidents take place, some right in front of us, so we are going to leave an extra few metres gap to the car in front. ( just in case ). Maybe that's what the powers that be wanted in the first place and this is a roundabout way of achieving it.

First part:agreed.
Second part: don't think so. Overly crowded roads will continue to cause 'incidents'. System will become smarter until they reach a point that these 'incidents' hardly occur anymore.

 

[hawleybeach]

Well I had spent most of the last 8000 kilometres since I got my MG4 in late January with AEB set to Alert, but I was tiring of going through the "Full Flight Routine" each time before I started driving. Mistake

I had experience numerous instances of the Cruise Control automatically slowing the car for no apparent reason, but that is minor. You just learn to rest your foot lightly on the throttle for those MG "Brain fart" moments

But the Emergency Stop is another league altogether. Was pulling out from the side of the road at night and BANG, the whole car just stopped. Had I hit something? No, there was a brief red flashing warning on the display

What I have now done is to set "Towing Mode" to disable all these annoyances. This doesn't turn itself OFF when you stop driving. You just need to turn it OFF before you reverse the vehicle. The towing symbol on the display may not go away, but at least your reversing sensors will work

At some point this technology will work properly, but not in 2024

 

[NLMGSAN]

Well I had spent most of the last 8000 kilometres since I got my MG4 in late January with AEB set to Alert, but I was tiring of going through the "Full Flight Routine" each time before I started driving. Mistake

I had experience numerous instances of the Cruise Control automatically slowing the car for no apparent reason, but that is minor. You just learn to rest your foot lightly on the throttle for those MG "Brain fart" moments

But the Emergency Stop is another league altogether. Was pulling out from the side of the road at night and BANG, the whole car just stopped. Had I hit something? No, there was a brief red flashing warning on the display

What I have now done is to set "Towing Mode" to disable all these annoyances. This doesn't turn itself OFF when you stop driving. You just need to turn it OFF before you reverse the vehicle. The towing symbol on the display may not go away, but at least your reversing sensors will work

At some point this technology will work properly, but not in 2024

One question about ACC slowing the car: does it happen when you overtake another car?

 

[pjmmk]

We are just used to it, not nonchalant. It can be very alarming and there is a risk of an accident but we are told statistically these systems prevent more accidents than they cause and so that's why they are effectively mandated and have to default to on.

Studies and statistics frequently prove whatever the people paying for them want them to prove. Unless you get to see the raw data for yourself, you, sadly, can't trust anything you see/hear these days. There's a very lucrative industry out there spinning stats for all it's worth, you can see it mostly in the pharmaceuticals and politics where it's exploded out of control.

 

[jollyman]

Well I had spent most of the last 8000 kilometres since I got my MG4 in late January with AEB set to Alert, but I was tiring of going through the "Full Flight Routine" each time before I started driving. Mistake

I had experience numerous instances of the Cruise Control automatically slowing the car for no apparent reason, but that is minor. You just learn to rest your foot lightly on the throttle for those MG "Brain fart" moments

But the Emergency Stop is another league altogether. Was pulling out from the side of the road at night and BANG, the whole car just stopped. Had I hit something? No, there was a brief red flashing warning on the display

What I have now done is to set "Towing Mode" to disable all these annoyances. This doesn't turn itself OFF when you stop driving. You just need to turn it OFF before you reverse the vehicle. The towing symbol on the display may not go away, but at least your reversing sensors will work

At some point this technology will work properly, but not in 2024

Yes I’ve had the same thing happen to me absolutely mental ,scared the life out of us.doing about 1 mile an hour just taking off from a temporary traffic light no other traffic around when bang emergency brake operated.I think the camera picked up the hedge as it pulled away and thought it was a danger.Twice this has happened now luckily no other vehicle involved and no damage,along with LKA, this vehicle is becoming a menace.\

 

[graham1311]

Yes I’ve had the same thing happen to me absolutely mental ,scared the life out of us.doing about 1 mile an hour just taking off from a temporary traffic light no other traffic around when bang emergency brake operated.I think the camera picked up the hedge as it pulled away and thought it was a danger.Twice this has happened now luckily no other vehicle involved and no damage,along with LKA, this vehicle is becoming a menace.\

I’ve now had the LKA fix at my first service, and it is certainly a lot less sensitive and far less frequent in giving the jerk to the wheel. Does anyone know if the fix also improves the emergency braking sensitivity. Logically it should as I assume it’s the same camera?

 

[NLMGSAN]

Studies and statistics frequently prove whatever the people paying for them want them to prove. Unless you get to see the raw data for yourself, you, sadly, can't trust anything you see/hear these days. There's a very lucrative industry out there spinning stats for all it's worth, you can see it mostly in the pharmaceuticals and politics where it's exploded out of control.

I would like to put it this way.

What we are expressing individually, yet in large numbers, is this poor overall quality of these systems, and the discomfort. However, those that make the rules about these systems never look at large scaled dissatisfaction or discomfort of the individual drivers. It is not a Key Performance Indicator of their policies. They don't even care. They only look at the number of road accidents on population level.

They only way to have a discussion with them is to bring up the numbers. As an example, if there is no evidence after 2022 (when lka became mandatory) that eg the number of frontal or near frontal collisions or overtake collisions on highways are dropping, then we could have a point. But I'm not confident they will even listen..

So best you can do is select a brand and type that has the best systems. Let the market itself solve the problem. That is what our governments are hoping for.

 

[DixieTGS]

The question becomes: do most people prefer a small increase in more serious head on collisions, or a larger number of rear end shunts plus feeling scared/nervous all the time while driving. This is effectively what we're weighing up each time it gets switched off.

P.s. I have no information to backup the proportion of each type of accident stated above.

 

[NLMGSAN]

Even Ncap has them so don't be 'ashamed'...

 

[WonkoTheSaneUK]

Studies and statistics frequently prove whatever the people paying for them want them to prove. Unless you get to see the raw data for yourself, you, sadly, can't trust anything you see/hear these days. There's a very lucrative industry out there spinning stats for all it's worth, you can see it mostly in the pharmaceuticals and politics where it's exploded out of control.

Mark Twain reportedly once said:-

There are three kinds of falsehood - Lies, damn lies and statistics