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C4 - DS4 Owners :: Forums :: Coupe and Hatch Pre 2011 cars :: Technical Questions

C4 Grand Picasso 2013 Start Stop issues

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mastercare   
Fri May 19 2017, 05:01am
Member No: #46944
Joined: Dec 02 2016
Location: London
I have a C4 Grand Picasso Diesel Auto 1.6 2013 and only have done 7700 miles.
Suddenly the Start Stop function has stopped working. The ECO light flashes
three times and nothing happens. The battery is fully charged and noting is
draining the battery. I have already checked all requirements for the function
to work to be ok. I have a Autel Maxidas d708 and it throws error A4D4 Fault:
Rear door sills or boot lighting fault : Short circuit to positive ,

I have checked all connections and lights to be working and nothing appears
to be short circuit. However on further diagnosis I found that in BIS system
one item failed ( Number plate illumination control Actuation failed ), however
the lights are working. The rest of functions on car are all ok. The DTC code comes back upon clearing.
Please help. Thanks in advance.
wunny   
Fri May 19 2017, 11:02am
Member No: #42824
Joined: Nov 29 2015
Location: Cardiff
Take it for a half hour drive, not in town and it will start working again.

The eco does what you have described when the battery is at 85% or less, &/or the temperature in the cabin hasn't reached what you've set the heater &/or aircon to.
1 User said Thank You to wunny for this Post :
 mastercare (19 May 2017 : 11:40)
FrankBullitt   
Fri May 19 2017, 11:05am

Member No: #19238
Joined: Apr 12 2011
Location: Cambridgeshire
wunny wrote ...

Take it for a half hour drive, not in town and it will start working again.

The eco does what you have described when the battery is at 85% or less, &/or the temperature in the cabin hasn't reached what you've set the heater &/or aircon to.

Or if the wind is in the wrong direction...there is a 'Y' in the month, the sun has risen in the morning... you get the picture!
1 User said Thank You to FrankBullitt for this Post :
 mastercare (19 May 2017 : 11:37)
mastercare   
Fri May 19 2017, 11:39am
Member No: #46944
Joined: Dec 02 2016
Location: London
I took the car for 100 miles run on M3 motorway and switched off all devices and climate control and yet still it shows the same DTC code and still Start Stop does not work. Every thing else is working. Strange !
gittos   
Fri May 19 2017, 12:19pm
Member No: #30055
Joined: Apr 02 2013
Location: Bolton
To be quite honest, if mine stopped working I wouldn't be bothered, it can be a pain in the neck sometimes.
1 User said Thank You to gittos for this Post :
 mastercare (19 May 2017 : 12:52)
mastercare   
Wed May 24 2017, 04:58pm
Member No: #46944
Joined: Dec 02 2016
Location: London
still the system is not working, its a bit of shame as the carhas only done 7700 miles. any help will be appericiated
FrankBullitt   
Thu May 25 2017, 03:29am

Member No: #19238
Joined: Apr 12 2011
Location: Cambridgeshire
mastercare wrote ...

still the system is not working, its a bit of shame as the carhas only done 7700 miles. any help will be appericiated

People have provided the answer - the stop-start relies on so many parameters being controlled that all too often it doesn't work; it's not a fault.
mastercare   
Thu May 25 2017, 03:51am
Member No: #46944
Joined: Dec 02 2016
Location: London
Hi, if there is no issues then why am i getting the error " A4D4 Fault:
Rear door sills or boot lighting fault : Short circuit to positive , " when I check the ECU with code readers?
mastercare   
Thu Jun 22 2017, 06:21pm
Member No: #46944
Joined: Dec 02 2016
Location: London
Hi guys, thank you all for your kind answers.
I have managed to resolve the issue.

Filled up the tank. Switch off all electronic devices. Switched all auto sensors (rain, lights). Started the car and left it running for 1 hour exact.
Drove the car while all electronic items were switch off on Motorway for 50 miles at 60MPH.
Stopped car and then started to test and it worked all fine.
Tested for 7 days and it is still running.

I will consider this as a fix.
Thanks all.
Clutha   
Wed Sep 20 2017, 02:50pm
Member No: #48826
Joined: Jul 04 2017
Location: Helensburgh
My 2015 GP4 (bought a couple of months ago), stop start took ages to sort itself out, probably battery and all parameters as described here.

Now its working I'm not sure I'm in favour of a starter motor getting so much work when town driving with many traffic lights.
I'm now in the habit of switching it off and have discovered it defaults to 'on' after parking up.

Is this a fixed scenario?
I'm starting to feel like a pilot doing pre flight checks.
routemaster1   
Wed Sep 20 2017, 03:19pm
Member No: #574
Joined: Jul 08 2007
Location: Dorset
Clutha wrote ...

My 2015 GP4 (bought a couple of months ago), stop start took ages to sort itself out, probably battery and all parameters as described here.

Now its working I'm not sure I'm in favour of a starter motor getting so much work when town driving with many traffic lights.
I'm now in the habit of switching it off and have discovered it defaults to 'on' after parking up.

Is this a fixed scenario?
I'm starting to feel like a pilot doing pre flight checks.

I'm not sure whether the 1.6HDi has the same system as the 2.0HDI, but the latter's stop-start system does not use the starter motor to restart. It uses an alternator which doubles as a motor to restart via the ancilliary belt.

The stop/start does reset every time. However, if you don't want the engine to stop, just keep your foot on the clutch if a manual. If an auto, I don't know what you can do.
mastercare   
Wed Sep 20 2017, 03:24pm
Member No: #46944
Joined: Dec 02 2016
Location: London
hi, just to let you know that my original fault with the start stop came back. driven 100 miles with all items switched off but still no joy
FrankBullitt   
Wed Sep 20 2017, 04:29pm

Member No: #19238
Joined: Apr 12 2011
Location: Cambridgeshire
Clutha wrote ...
Now its working I'm not sure I'm in favour of a starter motor getting so much work when town driving with many traffic lights.
I'm now in the habit of switching it off and have discovered it defaults to 'on' after parking up.

Is this a fixed scenario?
I'm starting to feel like a pilot doing pre flight checks.

As RM says, they don't have a starter motor - the stop-start is operated by the alternator firing in reverse to start the engine.

You can't turn it off, Euro 5/6 compliance won't allow it.
routemaster1   
Thu Sep 21 2017, 02:51am
Member No: #574
Joined: Jul 08 2007
Location: Dorset
FrankBullitt wrote ...

Clutha wrote ...
Now its working I'm not sure I'm in favour of a starter motor getting so much work when town driving with many traffic lights.
I'm now in the habit of switching it off and have discovered it defaults to 'on' after parking up.

Is this a fixed scenario?
I'm starting to feel like a pilot doing pre flight checks.

As RM says, they don't have a starter motor - the stop-start is operated by the alternator firing in reverse to start the engine.

You can't turn it off, Euro 5/6 compliance won't allow it.

As a matter of interest, is there a starter motor for the initial start, or does it rely entirely on the alternator?

The reason I commented about not knowing what happens on the 1.6HDi is that our Euro 6 C3 has stop/start, and it works differently to our C4GP, and sounds much more like a normal starter motor. The C4 will stop when the speed is below 12mph, and if you coast down a slope in neutral it restarts at 12mph, but the C3 will only stop when stationary and restarts as soon as it moves. It also starts if you are stationary and move the steering wheel.
 

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