Technical Start/Stop Not Working With Correct New Battery

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Technical Start/Stop Not Working With Correct New Battery

I don't have S/S on the Fiat but I do on my Vauxhall. I recently had the same thing and the dealer reckons the battery has to be connected for four hours for the car to relearn the battery (I don't understand it but it's been fine since). Mine won't work if certain things such as windscreen demister is switched on, it's not up to a reasonable temperature, the aircon is on, etc
 
For people saying it’s a rubbish system, is it?

A rubbish system would be one that fails to start the engine.

Just remember that a new battery might have been sitting on the shelf for weeks or months discharging gently and won’t be fully charged.

Secondly there are a lot of reasons why a car won’t Start Stop. My BMW isn’t start stopping at the moment like it normally would on my 50 mile commute to work, cold will play a massive role in all of this.
 
For people saying it’s a rubbish system, is it?

I'd prefer to say it's a rather crude system which depends on the correct functioning of a number of cheaply made sensors which quite often don't work properly. At least the system is 'fail safe' in so far as it (usually) just stops working if anything is out of limits.

There will be exceptions, most notably for those doing principally urban driving in heavy stop/start traffic, but most folks will never see a financial return on the extra cost and complexity; the extra cost in more frequent replacement of the (expensive) battery will outweigh the fuel savings. From the admittedly selfish perspective of an individual owner, I'd agree with those who say the hassle and expense of trying to keep 500 the S/S system working properly probably isn't worth the candle.

The environmental benefit to the population as a whole of cutting city noise and pollution is another matter; there are sound ecological arguments why S/S should be mandatory on all vehicles in highly polluted cities.

There are other marques with S/S systems that are both better engineered, and better implemented.

And if you know you're going to be stopped for a significant length of time, then regardless of whether you've got S/S, or if it's working, you can always just turn off the engine.
 
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I hate Stop/Start but I love the system on my 2012 JTD. It's the only S/S system I've come across that doesn't reset every time I start the engine, it just stays disabled.
On another subject, I also love the fact that Fiat have done away with the sidelights, completely pointless with DRLs, in fact pointless in any case.
 
Surely if you park in a safe manner you wouldn't need to leave the lights on?

The UK lighting regs are stricter than many folks think, though enforcement is patchy.

Cars, goods vehicles not exceeding 2500 kg laden weight, invalid carriages, motorcycles and pedal cycles may be parked without lights on a road (or lay-by) with a speed limit of 30 mph (48 km/h) or less if they are:

  • at least 10 metres (32 feet) away from any junction, close to the kerb and facing in the direction of the traffic flow
  • in a recognised parking place or lay-by.
Other vehicles and trailers, and all vehicles with projecting loads, MUST NOT be left on a road at night without lights.


I was under the impression that law only applied if you parked facing traffic on the wrong side of the road?

This is illegal at night irrespective of whether you leave your lights on or not, unless you are in a recognised parking space. It's not an endorsable offence, but you can be fined up to £1000 (£2500 for a goods vehicle). I've heard anecdotally that, in some areas, this is seen as a source of easy money by traffic wardens.
 
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It's similar in Germany, outside city limits, parked vehicles must have lights at night. Even in cities, when there is no light or it gets switched off during the wee hours, the vehicle must have lights on - as a minimum on the roadside, a circuit which is not supported in many cars today.
 
It's similar in Germany, outside city limits, parked vehicles must have lights at night. Even in cities, when there is no light or it gets switched off during the wee hours, the vehicle must have lights on - as a minimum on the roadside, a circuit which is not supported in many cars today.

In days past, it was a requirement in the UK even on 30mph roads with streetlights. You could buy a parking light as an accessory; they clipped onto the drivers window and you connected them up to a 12V permanent live feed.

There's still a demand for these today, mainly from classic car owners seeking authenticity.
 

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Saw that quite often. I never knew if the lights could be switched to either side or if the circuit was not modified on some imported cars.

You switched them via the indicator stalk for which side to use, very common on German cars

Have to say the thread is now some way from the original post, but if people don't mind,,,,
 
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