Stop start stopped working

[Lexman8]

Originally Posted by ChrisSW

Oh, and apparently to trickle charge the XC90, you need a charger costing around £450..

The dealer will be using a high output commercial charger. No need for that in a domestic setting. An intelligent charger like this will do the job: http://www.ctek.com/gb/en/chargers/MXS%205.0

I've been using one of these for years. It's safe to charge the batteries while they're still connected to the car and that's made simpler by the supplied permanent cable/plug connector. (However, personally, I wouldn't run the reconditioning programme with the battery connected to the car.)

That said, a car being used 'normally' shouldn't need trickle charging. The exception would be many short journeys with a high electrical load (heated screens, seats, etc). I don't know if the XC's charging system favours the start/stop battery over the main battery or vice versa.

[RoyMacDonald]

Originally Posted by Lexman8

The dealer will be using a high output commercial charger. No need for that in a domestic setting. An intelligent charger like this will do the job: http://www.ctek.com/gb/en/chargers/MXS%205.0

I've been using one of these for years. It's safe to charge the batteries while they're still connected to the car and that's made simpler by the supplied permanent cable/plug connector. (However, personally, I wouldn't run the reconditioning programme with the battery connected to the car.)

That said, a car being used 'normally' shouldn't need trickle charging. The exception would be many short journeys with a high electrical load (heated screens, seats, etc). I don't know if the XC's charging system favours the start/stop battery over the main battery or vice versa.

I think the main battery has priority as it is used to start the car while the small second battery only powers the display radio etc while the engine is waiting to start again in stop start mode and it uses the main battery to start up again.

Roy

[Dave©]

Originally Posted by Lexman8

The dealer will be using a high output commercial charger. No need for that in a domestic setting. An intelligent charger like this will do the job: http://www.ctek.com/gb/en/chargers/MXS%205.0

I've been using one of these for years. It's safe to charge the batteries while they're still connected to the car and that's made simpler by the supplied permanent cable/plug connector. (However, personally, I wouldn't run the reconditioning programme with the battery connected to the car.)

That said, a car being used 'normally' shouldn't need trickle charging. The exception would be many short journeys with a high electrical load (heated screens, seats, etc). I don't know if the XC's charging system favours the start/stop battery over the main battery or vice versa.

So if I charge the main battery will I also be charging the start/stop battery? My start stop has not worked in three weeks. It makes driving smoother but the gph indication bugs me when stopped in traffic - it has got to affect mpg.

It would be good to be able to see details in car diagnostics about what has stopped start/stop...

[Clan]

Originally Posted by Lexman8

The dealer will be using a high output commercial charger. No need for that in a domestic setting. An intelligent charger like this will do the job: http://www.ctek.com/gb/en/chargers/MXS%205.0

I've been using one of these for years. It's safe to charge the batteries while they're still connected to the car and that's made simpler by the supplied permanent cable/plug connector. (However, personally, I wouldn't run the reconditioning programme with the battery connected to the car.)

That said, a car being used 'normally' shouldn't need trickle charging. The exception would be many short journeys with a high electrical load (heated screens, seats, etc). I don't know if the XC's charging system favours the start/stop battery over the main battery or vice versa.

Things have moved on in the last 10 years ... the alternator is no longer self contained , it is controlled by the car's main computer , once the battery gets to 80% charged , it only charges when the throttle is up or the brake pedal is down ... Hence sometimes you need to top it up that upper 20% if driving conditions become severe for power consumption .

The main battery is priority as usual , the secondary battery gets charged whilst driving .

[ErnieS]

Volvo set the Stop Start system to cut off at 72% of the battery rated cca so usually it is a good early warning that the battery is on it's last legs... Not sure what the battery is rated at on an XC90 I'm not that rich but I suggest you have it tested as that is usually free at most Motorist shops... Oh and if it is that which is causing your problem the message in your Stop Start settings would be Battery Charging.

[Jabbslad]

My Start/Stop stopped working about a week or two after it came back from the AC recall. I had only been on one or two really short trips (1 or 2 miles) over the past couple of weeks.

However, today I went on a decent 30 minute drive out of town. It still wasn't working on the outbound leg, but on the return leg Start/Stop was working again, so that seems to corroborate with what a lot of guys said on here about the battery.

[Driver Dave]

I have thr same problem as many of the previous posters, a lot of my day to day journeys are quite short (approx 5miles each way. Perhaps Volvo would like to look into providing a battery that will cope with these situations, or reprogramme the charging system so the alternator does it's job more effectively, because at the moment I don't think it is fit for purpose.

[AB-UK]

Original message deleted - Just asked DriverDave to post some photos, then saw his post plus picture in another thread.

[GMTRB5]

Originally Posted by Driver Dave

I have thr same problem as many of the previous posters, a lot of my day to day journeys are quite short (approx 5miles each way. Perhaps Volvo would like to look into providing a battery that will cope with these situations, or reprogramme the charging system so the alternator does it's job more effectively, because at the moment I don't think it is fit for purpose.

Personally I'd prefer the start / stop to not work in this situation anyway .. it can't be good for a cold engine to be starting and stopping regularly? Every car I've driven doesn't activate start / stop until the engine is warm that I've noticed (although I tend to disable it anyway as soon as I get into the car!)

[Lexman8]

In certain situations or conditions, the engine may not auto-stop when the vehicle comes to a standstill, such as when:

• the vehicle's has not reached a speed of approx. 8 mph (12 km/h) after starting.
• after several auto-stops, the speed must again exceed approx. 8 mph (12 km/h) before the next auto-stop.
• the driver's seat belt is unbuckled.
• the main battery's charge is below the minimum level.
• the engine has not reached its normal operating temperature.
• the ambient temperature is below approx -5°C or above approx 30°C.
• the windshield's heating function* is activated.
• the climate system cannot keep the desired settings in the passenger compartment.
• the vehicle is backing up.
• the main battery's temperature is above or below the permitted limits.
• the driver is turning the steering wheel hard