Technical Fiat 500 Start Stop System

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Technical Fiat 500 Start Stop System

I have one question about the Start Stop system. I have quite enjoyed having it on, I feel like I'm doing something about pollution whether it saves me any money or not, and it's just have a nice new car that does fancy things like that!

Now I've had it for a few weeks, it seems to have run down the battery a little bit so Start Stop sometimes works, and sometimes doesn't - it normally works on the way to work, but not on the way home, for example. That's fine, I understand that it won't work if he battery isn't charged enough, and nobody wants a flat battery!

But sometimes Start Stop will activate and switch off the engine, then say 'Start Stop unavailable', and the engine doesn't come back on when I push the clutch in, so I then have to use the key to restart the car. Is this normal? It seems to always happen at work when I get out of the car to unlock the car park gate in the morning. Could it be to do with me getting out of the car, do you think? Or is that just a little bit too clever?
 
I have one question about the Start Stop system. I have quite enjoyed having it on, I feel like I'm doing something about pollution whether it saves me any money or not, and it's just have a nice new car that does fancy things like that!

Now I've had it for a few weeks, it seems to have run down the battery a little bit so Start Stop sometimes works, and sometimes doesn't - it normally works on the way to work, but not on the way home, for example. That's fine, I understand that it won't work if he battery isn't charged enough, and nobody wants a flat battery!

But sometimes Start Stop will activate and switch off the engine, then say 'Start Stop unavailable', and the engine doesn't come back on when I push the clutch in, so I then have to use the key to restart the car. Is this normal? It seems to always happen at work when I get out of the car to unlock the car park gate in the morning. Could it be to do with me getting out of the car, do you think? Or is that just a little bit too clever?

Yes - if you leave the car after the SS has stopped the engine you get the 'Stop Start unavailable message' and have to re-start the car manually.

It's a safety feature to prevent it automatically re-starting the engine after 3 mins. if there is no body in the drivers seat.
 
Thanks guys, that solved that problem! It's a very minor nuisance because I have to get out of the car every morning to get into work, but this morning I just turned SS off for a few minutes. All sorted!
 
May I ask people's opinions on the detrimental affect that the stop/start system places upon a car?

I switch it off usually and cope with the orange light. But I might just be over cautious. If it were still an optional extra, as it used to be, I wouldn't have specified it that's for sure; tax, fuel and environmental benefits or not.

I am concerned that the car doesn't get to be properly hot with the engine off and cooling every stop, the sort of long term heat on a good run that burns off the condensation mayonnaise-type gunk sometimes found at the top of the engine/rocker. The car thinks it is hot, otherwise it doesn't work but our car thinks it is warm after only a few miles, I don't agree.

Exhausts usually rot from the inside-out on cars that are used for short journeys due to acidic condensation, again is not getting decent heat in to it going to accelerate this process?

There is the obvious additional use and wear on the starter, although I have never had to replace one on any of my cars so I cannot really say that would definitely cause me an issue even though I intend on keeping our car for 10yrs, around 60k miles.

I am also concerned about the extra strains on the cambelt, all those stops and starts. Fiat recommend replacement after 4yrs if used for short journeys instead of 5yrs. Is this a pointer towards my thinking? Our car will only have 24k after 4yrs so low on miles so do I wait until 5yrs? It is left to owner's own opinion what is classified as short journeys.

I am not too concerned about the battery, it is of upgraded type to supposedly deal with the extra strain, it is easily replaced even if it is for more money over a basic lead-acid. If the charge is low the SS system doesn't work anyway.

When selected, our SS has worked faultlessly by the way.

Thanks in advance.
 
The amount of heat being generated by an idling engine is minimal, s&s is not going to be the difference between a good engine and one with mayo in it. You try warming a 500 up in the winter just by idling (dumb idea btw) and you'll see how long it takes, it's actually far better just to get in, start it, wait a couple of seconds for the oil to make its way around the engine and just drive off. I digress of course, but S&S isn't going to cause issues in that sense.

Exhausts, much the same tbh. Perhaps a touch more wear if you stop for long amounts of time, but I doubt it.

Starter is beefed up to cope with the demands of S&S :) I turn my car off and on when I stop and I have a non-s&s 500, I just ticked over 57k miles today and I'm not having any issues with my starter!

Cambelt, I also doubt this would be much of an issue tbh, but then again I have no reasoning for this other than that's what I think.

S&S is now common in cars, I doubt you'll stuggle to find a battery when the time comes, a good smart charger like a Ctek will prolong the life of your battery as well.
 
As Maxi has said above. You're worry far to much imo.

Regarding timing belt changes, the interval is no different to what Fiat have been using for years.

You've got to think that Fiat, and other manufactures that use similar tech, place warrantees on these setups, although its no answer to how it'll perform in 7-10 years time, they're hardly going to be designing them in a way that'll allow premature failure and it possibly failing within warrantee.

Weather you agree with it or not, petrol engines get up to temp very quickly, especially if the thermostat is working correctly. When up to temp its up to temp, running it for longer, or leaving it running, isn't going to make it get any hotter. In addition to this leaving it off for 2 min isn't going to be long enough for it to cool.

Start stop being used doesn't stop the car stretching its legs when on a run either and heating the exhaust up. SS isn't going to stop the exhaust heating up.

You doing 6k a year is fairly low mileage, so personally I'd have said you should be looking at a 4 year belt change. Then again it depends upon how often the car is left un-used ultimately, but its your choice.
 
It defaults to on. You can press the button to disable it, but this only lasts till the engine stops at the end of a particular journey. The minute you start off again the S&S is engaged. There is no way you can disable it permanently, not on my car anyway.
Hi Guys, I picked up my new Lounge 2 weeks ago dreading the S/S
I pressed the button to disable it, and the light came on saying it was off, but it hasn't re engaged for the next 13 days :)
 
Hi Guys, I picked up my new Lounge 2 weeks ago dreading the S/S
I pressed the button to disable it, and the light came on saying it was off, but it hasn't re engaged for the next 13 days :)

This is the correct operation of the stop start. Mine will do the same if I turn it off. Fiat changed it so that the car remembers that you don't want it.
Why you should 'dread' it is beyond me. The car does its thing and the world keeps on spinning, no great disaster has befallen me because I didn't turn off the stop start, sometimes it engages when I stop, sometimes it doesn't , sometimes I forget to select neutral so it won't work and sometimes I forget its there and it surprises me. The one thing I can say is that it has had no detrimental effect on my life.
 
Has anyone had this fault on their car?

Pull up at the lights for instance, go into neutral and the engine stops, S&S logo appears on the clocks. lights go green, press the clutch and nothing happens. The motor does not restart. You then have to quickly turn the keys fully off and restart the car whilst everyone behind you thinks your sending a text etc.

in testing out this problem, if I don't restart the motor and just wait, I will eventually get "start/stop unavailable" I may even get "ELD unavailable" "ESC unavailable" and once had "airbag fault"

Typically this problemis intermittant with the car working great 75% of the time and everytime the dealer has had it in it flaming works fine.

Any pointers would be much appreciated.
 
Hi Guys, I picked up my new Lounge 2 weeks ago dreading the S/S
I pressed the button to disable it, and the light came on saying it was off, but it hasn't re engaged for the next 13 days :)

So basically you got are scared of s&s because the ignorant and moronic don't like it so you turned it off and now your car is more expensive to run, great.
 
With mine the button seems to disable it for one journey only. The dealership people were surprised because they believed the button disabled it until reabled by pressing again.

I think it might be because my car is over three years old and newer systems/models are configured differently.

Either way, it works well enough when it feels like it, but I have to be careful because the button is down between the seats near the ESP button - I don't want to disable that!
 
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