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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.
 

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