Emergency braking malfunction

ICE, Equipment, Options
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Sandsoftime
Posts: 1
Joined: Thu Sep 03, 2020 7:59 am
Qashqai Model: Mk.2 Qashqai Facelift - J11b (2017–present)

Emergency braking malfunction

Post by Sandsoftime » Thu Sep 03, 2020 4:20 pm

Hi, I’m hoping someone can help me get the problem with the ‘Intelligent’ emergency braking system on our 2018 Qashqai N-CONNECTA sorted as I seem to be getting nowhere.
Having bought the car from a Nissan main dealer in March last year we were very pleased with it, however... since last November we’ve had four instances where, without warning the red impact warning light and buzzer have gone off along with automatic braking severe enough to momentarily lock the wheels. Each of these have been at between 30 to 40 miles an hour, on different roads, in daylight with dry conditions, no upcoming junctions or road furniture and with no vehicles directly in front or coming towards us.
Having at the time only had one braking malfunction the car went to the main dealer in January this year (2020) for a full service and software update which I was told would correct the malfunction. Within a week or so of getting it back the emergency braking had incorrectly activated twice again, the second time was when I was passing some adults and children on the pavement and, until I realised exactly what had happened, I really thought I’d hit a child that had had run into the road in front of me.
Needless to say the car went back to the main dealer in February who said they had replaced a sensor, although I have no paperwork from them to show it. Due to lockdown the car had little use since then until a couple weeks ago we were on a ’staycation’ when it happened again. Luckily the van behind managed to pull up without hitting us but it shook my wife up and she is very loath to drive the car on her own again. As we were several hundred miles from home we called out the breakdown vehicle who advised us to disarm the automatic braking system until we could get it to a main dealer.
The car spent yesterday being checked at a second Nissan dealership. Their diagnostics and a road test were unable to find any problems so I’m left with an expensive vehicle that unpredictably applies emergency braking for no reason and in my view is unsafe to drive.
A cursory search on the Internet shows that the owners of the American version have/are pursuing a class action against Nissan for the same problem. Has anyone come across any similar action over here or perhaps reported the fault to the DVSA.
I’d be grateful for any help you can give me.

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MikeGC
Posts: 613
Joined: Tue Feb 07, 2017 11:50 am
Location: Stockport
Qashqai Model: Mk.2 Qashqai Facelift - J11b (2017–present)

Re: Emergency braking malfunction

Post by MikeGC » Thu Sep 03, 2020 4:52 pm

Sounds like you need to get the car into a garage to me (although admittedly I’m regularly wrong about such things)

My emergency brake saved me a couple of years ago when the driver in front brakes hard - with no brake lights in working order so certainly worth having fixed.
And I imagine you might also have a brake problem, the car should have anti-lock brakes and never lock up.
July 2019 Qashqai 1.3DIG-T 160 DCT Tekna in Vivid Blue
previous March 2017 Qashqai 1.5dci n-connecta in Gun Metal Grey
previous September 2014 Juke 1.5dci n-connecta in Gun Metal Grey

Pandjh
Posts: 465
Joined: Sat Feb 04, 2017 11:34 am
Location: South-East England
Qashqai Model: Mk.2 Qashqai Facelift - J11b (2017–present)

Re: Emergency braking malfunction

Post by Pandjh » Thu Sep 03, 2020 5:13 pm

I've had 2 software updates on this and still occasionally get what I would consider false alarms, fortunately it no longer gets to the point where the brakes are applied. I believe I read that the driver can simply/briefly depress the throttle fully to override this, assuming you have presence of mind to do so.

Perhaps it would be worth logging this as a complaint with Nissan CS.
2019 1.3 DiG-T 160 Tekna, black (J11b)
prev 2015 1.2 DiG-T n-tec+, black (J11)
prev 2009 1.5 dCi Acenta, black (J10)

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calnorth
Posts: 1584
Joined: Mon Feb 11, 2019 2:01 pm
Qashqai Model: Mk.2 Qashqai Facelift - J11b (2017–present)

Re: Emergency braking malfunction

Post by calnorth » Fri Sep 04, 2020 7:25 am

Its dangerous and there is evidence on this site and elsewhere that it happens irregularly/unexpectedly and is a known. Its impossible to determine why such false alarms arise. Its front end radar/camera sensing over about 100yds and software processing to both trigger warnings and at worse hard braking at a determinable point.

I don't think a dealer can deterministically recreate such events. Its not clear if the fault is simply random or is due to cumulative radar returns. Is it software behavioural errors? Only lab test gear might determine that.

Also. its likely that error codes don't arise so that diagnostics cannot be simply applied. However, Nissan is very aware of it so a fairly forceful email/letter to Nissan UK is in order stating clearly that it is a very dangerous condition. Meanwhile switch it off.
Last edited by calnorth on Fri Sep 04, 2020 10:17 am, edited 1 time in total.
Thankfully unbusy (retired)
Mk2 Qashqai Facelift - J11b (2017–present)
1.6 Dig-T N-Connecta

phatboy
Posts: 67
Joined: Tue Jul 23, 2019 12:26 pm
Qashqai Model: Mk.2 Qashqai Facelift - J11b (2017–present)

Re: Emergency braking malfunction

Post by phatboy » Fri Sep 04, 2020 8:32 am

Welcome to Qashqai ownership! Mine does it too... had all the software updates but it persists. I find it usually misfires when:
- there are people on a pavement, and a very slight bend / kink in the road
- a traffic island on a narrow road
- trying to overtake a truck
- multi-storey car parks, any trunking or other obstacles on the ceiling cause it.

Sometimes it's full on application of the brakes, sometimes just a red or yellow visual and audible warning.

There are a few hot-spots I know of now, so drive very slowly in those areas. Local dealership were aware of most of the places I told them about, being a small place.

Annoyingly, there is no way to disable the function permanently, and it must be done every time.

IMO the technology isn't road ready, and should be removed.
2019 Qashqai Tekna Dig-T 140

User avatar
calnorth
Posts: 1584
Joined: Mon Feb 11, 2019 2:01 pm
Qashqai Model: Mk.2 Qashqai Facelift - J11b (2017–present)

Re: Emergency braking malfunction

Post by calnorth » Fri Sep 04, 2020 10:19 am

Additional Info - No Reason is a bit of a loose term really. I've yet to experience AEB (where fitted). Although they update my cars firmware, so I assume its fitted. I get odd pings from it...looks like its time of year dependant? Weird stuff that I don't like...Start/Stop being the other.

http://www.nissanproblems.com/aeb/

2020-09-04_11180.png

Last edited by calnorth on Fri Sep 04, 2020 10:43 am, edited 1 time in total.
Thankfully unbusy (retired)
Mk2 Qashqai Facelift - J11b (2017–present)
1.6 Dig-T N-Connecta

User avatar
calnorth
Posts: 1584
Joined: Mon Feb 11, 2019 2:01 pm
Qashqai Model: Mk.2 Qashqai Facelift - J11b (2017–present)

Re: Emergency braking malfunction

Post by calnorth » Fri Sep 04, 2020 10:25 am

Goto 10:30 mins in for an auto braking demo on a Mercedes truck. Not sure if this is a p*ss take?

Thankfully unbusy (retired)
Mk2 Qashqai Facelift - J11b (2017–present)
1.6 Dig-T N-Connecta

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