Grand Picasso II (2015) Lane Departure Warning

This is the Forum for all your Citroen Technical Questions, Problems or Advice.

Moderator: RichardW

WillyR
Posts: 74
Joined: 18 Aug 2013, 21:24
x 1

Grand Picasso II (2015) Lane Departure Warning

Post by WillyR »

The Lane Departure Warning (LDW) function on my (July) 2015 2.0 hdi Exclusive EAT6 Grand Picasso died around 6 months ago. At the time, the car battery was approaching 7 years old, and I did not worry unduly then.
I have now replaced the battery with the recommended AGM096, from Halfords, and the Stop-Start has been reborn, but the LDW has stayed dead.

The side cameras work (360 view is fine), and the seat belt vibrator function works perfectly on reaching6-10mph, and, as I remember (not had reason to jam on brakes recently) the seat belt tighten function still works on heavy braking or vehicle ahead too close (imminent crash).

The LDW, I believe, is controlled by a camera in the windscreen. How can I check that? Or anything else pertinent to this fault?

All advice most gratefully received.
Please help.
User avatar
GiveMeABreak
Forum Admin Team
Posts: 28088
Joined: 15 Sep 2015, 19:38
x 3393

Re: Grand Picasso II (2015) Lane Departure Warning

Post by GiveMeABreak »

It may be possible there is a fault with the camera itself, so any safety-related functions can be deactivated as a result. Without a diagnostic though it will be difficult to say for sure. These need specialist attention for calibration. They can also go wrong if the windscreen has been replaced and a camera calibration has not been undertaken.

A dealer will be able to advise whether it's hardware, electrical or a software issue.
WillyR
Posts: 74
Joined: 18 Aug 2013, 21:24
x 1

Re: Grand Picasso II (2015) Lane Departure Warning

Post by WillyR »

Thanks for your helpful comments, Marc. The only system not working currently is the LDW, so the big question is... is the LDW camera system only responsible for LDW?
There are currently no OBD codes indicating or stored.
Will

Anyone else got any ideas? Crossing the threshold at my dealer is not high on my agenda at present, as we all know that dealers rarely deal in low costs.
User avatar
GiveMeABreak
Forum Admin Team
Posts: 28088
Joined: 15 Sep 2015, 19:38
x 3393

Re: Grand Picasso II (2015) Lane Departure Warning

Post by GiveMeABreak »

Diagnostics do cost in the region of £90, but they can do advanced checks on the system that you may not find with your own diagnostic device and remember, that basic OBDII readers will not pick up any constructor-specific faults codes - which in this case the LDWS will be.

If you pop your VIN up (automasked on post submission) I can see which system you have, as there are 2 types, depending on build date.
WillyR
Posts: 74
Joined: 18 Aug 2013, 21:24
x 1

Re: Grand Picasso II (2015) Lane Departure Warning

Post by WillyR »

VF7**************[VIN obfuscated, can be read by forum staff]
User avatar
GiveMeABreak
Forum Admin Team
Posts: 28088
Joined: 15 Sep 2015, 19:38
x 3393

Re: Grand Picasso II (2015) Lane Departure Warning

Post by GiveMeABreak »

Ok, so first check the obvious - has the system been switched off from the Driver Assistance menu on the touchscreen? (press the icon of the Car on the touchscreen) and check on the list of functions that it has not been deactivated from there. Later systems tend to have the system automatically re-enabled the next time the ignition is started, but on earlier systems, I believe it was possible to deactivate it, as on your system the state of the LDWS is memorised and retained after the ignition is switched off according to the data I have on this.

Try that first.
WillyR
Posts: 74
Joined: 18 Aug 2013, 21:24
x 1

Re: Grand Picasso II (2015) Lane Departure Warning

Post by WillyR »

I read your reply above, thought I knew the answer but erred on the side of caution, so I'm just going to take the car out and double check the indicators etc.

Will
WillyR
Posts: 74
Joined: 18 Aug 2013, 21:24
x 1

Re: Grand Picasso II (2015) Lane Departure Warning

Post by WillyR »

OK... With Ignition on LDW shows green. After Starting engine the green indicator goes OFF. At around 20mph an orange EXCLAMATION mark shows in the LDW indicator. This disappears after about 5-10 seconds.
NO LDW.
If I try to reactivate the LDW, the exclamation reappears and disappears after 5-10 seconds. NO LDW
I have read elsewhere that failed seatbelt actuators (no agitation on start off from parked or sudden stop / impending accident) will inhibit LDW, but my seatbelts work as they are supposed to , except for no LDW actuation.
My windscreen was replaced at around 2000 miles, and LDW worked fine from that point until about 3 / 4 months ago, which I thought might have had something to do with the battery no longer being such a happy bunny at almost 7 years old (it stopped the STOP/START working about 18 months ago).
Any ideas?

Will
User avatar
GiveMeABreak
Forum Admin Team
Posts: 28088
Joined: 15 Sep 2015, 19:38
x 3393

Re: Grand Picasso II (2015) Lane Departure Warning

Post by GiveMeABreak »

Any and All of the above Will can cause the issue. If the lamp on the button flashes momentarily then goes out, there is a fault with the system and unfortunately it needs specialist diagnostics to troubleshoot, so either leave it non-functioning or take the plunge at the dealer.
WillyR
Posts: 74
Joined: 18 Aug 2013, 21:24
x 1

Re: Grand Picasso II (2015) Lane Departure Warning

Post by WillyR »

Thanks again for your help and suggestions, Marc. The dealer it is, then...

Cheers
Will