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2019 Leaf 40
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Discussion Starter #1
Is it only Nissan Dealers that can do the full 4 wheel align and then make sure the radar unit is properly aligned? I'm beginning to think the slightly weird behaviour of mine under both pro pilot and ICC is due to the radar being slightly off.

If you follow a larger vehicle on a non straight road it rushes up to the back of it then brakes, then rushes up to the back of it then brakes again. Seems to be most noticeable on right hand curves.

It also does it sometimes with smaller vehicles on right hand curves. I've not noticed it on left hand ones.

The propilot with active steering engaged also zig zags on straight roads so I definitely think something is a bit weird.

The local nissan dealer isn't open and I have no idea when they will. There aren't any HEVRA garages at all anywhere near so I'm wondering if a normal tyre place would have the right gear these days?

I didn't know that the radar units were aligned as part of the wheel alignment. The behaviour hasn't really changed that much after changing tyres but it makes me wonder whether everything is set up correctly.

If you align the radar do the cameras then need further alignment?

ICC without the assisted steering is quite useful sometimes but with these faults it's basically too incompetent to use on roads when you need it. Seems a bit silly to have to use basic dumb cruise control because the car can't do the advanced things it's meant to.
 

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Following for interest. This is going to get more and more common.

It's probably really obvious and I'm sure you have done this, but have you checked the radar is clean and not loose?
 

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2019 Leaf 40
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Discussion Starter #3
It's been washed a few times and doesn't tend to behave differently. Hadn't checked it was loose but haven't noticed any wobble when cleaning the car.

The front parking sensors are a bit slow to react compared to the rear ones as well.
 

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My adaptive cruise works well at keeping distance on straight roads & very mild curves but if the bend tightens to much it looses sight of the vehicle in front & will attempt to increase speed to whatever the cruise is set at untill it picks up signal again or I slow it down.... I tend to only use it on motorways as this is where it works best..
My assisted steering bounces slowly from left to right same as yours, so I turn that part off.. I just put it down to Nissans software/cameras not been as high tech/accurate as some manufacturers..
Will be good to see how others compare...
 

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2019 Leaf 40
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Discussion Starter #5
I've only tried it on wide duals and the odd bit of motorway. It's definitely worse on duals.

Looks like it's basically a complete waste of time using cruise at all then. I rarely travel on motorways but cruise on duals while it's quiet is quite useful. It does do a bit of acceleration when you indicate to pull out which is quite clever. Although you can over ride cruise with more gas.

I assume I can turn off intelligent cruise in the settings so pressing the pro pilot button and doing set for the speed gives normal dumb cruise that I can use + or - button to control distance myself

I guess you can't use dumb level cruise with active steering?

It's rather disappointing. I expected it to be better. Is it worse or better with E Pedal on? Never tried that combination.
 

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As with all cars it does take a while to work out how the tech works + when & where it works best..
For me Pro Pilot works best in heavy, slow, stop start traffic & motorways, anywhere else I find I'm having to correct it too many times & becomes a bit annoying...
I'm not sure if you can turn off the adaptive cruise part, I can't think why that would help.. I find it easier to just turn off pro pilot until traffic conditions allow it to work ok again..
Keeps my driving skills in check too, use it or loose it they say 😊
Not noticed any difference with E-pedal on or off in regards to pro pilot..
 

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2019 Leaf 40
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Discussion Starter #7
I did try E Pedal on its own in the stop/start crap traffic. It's good at that. Not sure what happens in a very heavy braking situation but it does stop fairly sharply if you lift suddenly. Nearly collected a few dozy people in the boot lid while I was getting used to it...

If I can find somewhere that's got the right kit then I will try and get it checked to see whether it's a) off and b) when it's correct it's any different.
 

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I did try E Pedal on its own in the stop/start crap traffic. It's good at that. Not sure what happens in a very heavy braking situation but it does stop fairly sharply if you lift suddenly. Nearly collected a few dozy people in the boot lid while I was getting used to it...

If I can find somewhere that's got the right kit then I will try and get it checked to see whether it's a) off and b) when it's correct it's any different.
I use Pro-pilot in heavy stop/start traffic as it will keep the distance from vehicle in front & come to a stop without touching any pedals when they do, then if they move within a few seconds Pro-pilot follows... If it's longer you just press button on steering wheel or tap quiet pedal & off you go again following vehicle ahead at the set distance & up to the set cruise speed...
A good body shop repair center is more likely to have the equipment to check/ set up radar & cameras than a dealer...
Might be worth trying them?
 

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2019 Leaf 40
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Discussion Starter #10
Didn't think about a bodyshop. Don't think any are open locally yet. A proper tyre place should as well but many are still using the old machines not the fancy new ones.

Most of the roads I use with heavy traffic have slip roads and joining cars. Pro pilot slows down and speeds up in weird way especially when folk turn off so I can't really use it at all. It slows too long then boots it too much. May have to experiment with distance setting to see if it's better on shorter following.
 

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It does sound like yours isn't quite right & needs adjusting or software update/re-set..
I had an Ionic before the Leaf & have to say that was better at reacting to other vehicles whilst using adaptive cruise & steering, you could set it to react quickly or slowly in the settings menu depending on what you wanted... Even had an option to set the number of flashes for the indicator to 3/5/7 for the tap to indicate.. ( set mine to 5 as 3 isn't quiet enough IMO )
I was thinking of getting my Leaf checked out for the slow zig zag when using assisted steering but as I've heard others do the same I just thought that's just how it is..
I'll be interested to see if yours improves if it is recalibrated..
 

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2019 Leaf 40
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Discussion Starter #12
I hope alignment does make it better. It's almost unusable at the moment. It's also a cheap fix really. The newer Leafs have an updated pro pilot that is supposed to be better.

I keep meaning to put something round the top dead centre of the steering wheel to compare how much it moves in various settings compared to me steering it.
 

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Mine is the newer leaf ( got 2 usb ports in rear of car ) so if mine is the improved version then older ones must be really bad 🙄 although adaptive cruise is ok in mine..... I think I was spoilt with the Ionic as that was spot on, had the Leaf been my 1st car with assisted steering I wouldn't know any different..
 

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2019 Leaf 40
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Discussion Starter #14
I will get the alignment checked though just in case it dampens the ping ponging and indecision.
 

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A bit tangential re this discussion, but I regard these assisted driving issues a real problem for any move to autonomous vehicles.
What happens when they've gone wrong? How do you know when they've gone wrong? How do you deal with intermittent faults? Are repair services capable of diagnosing and repairing faults? From my experience with almost any, but the most obvious, faults the dealers and independents are pretty hopeless at engine management faults.
 

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The wonderful world of technology is a double edged sword, most of us like the tech & features they offer but solving faults can be a nightmare, even more so when they are intermittent...
The electronics do seem to be more reliable now than they used to be but solving issues really require an IT specialist to understand how the whole system works...
I can get my head round basic systems but the way things have gone/going sometimes your going to need a genius to understand & fix a modern vehicles electrical workings...
 

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2019 Leaf 40
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Discussion Starter #17
That new self driving chinese car with the 30 sensors springs to mind. My first thought was what happens when one or two go wrong or a bird craps on a few of them?

The Leaf got upset in sleet and squeaked about something. That was only sleet.
 

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That new self driving chinese car with the 30 sensors springs to mind. My first thought was what happens when one or two go wrong or a bird craps on a few of them?

The Leaf got upset in sleet and squeaked about something. That was only sleet.
It's okay if they are just driver assistance. It's Tesla I worry about, what happens if your robotaxi gets bird muck on it? There are no wipers for most of the cameras. Do the passengers have to get out and clean it off? And how does that work if the car is empty on its way to pick them up?
 

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2019 Leaf 40
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Discussion Starter #19
I'd imagine they'd get out of the car and clean it and it would drive off without them :D
 

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Well indeed, an itermittent fault with a radar/camera, steering or brake actuator could cause serious accidents. Most of the time it would drive fine. Some may disabree, but I can't imagine an autonomous vehicle driving round the North Circular, let alne the South Circular.
 
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