C5 Leccy widows

[Stempy]

Having had time to bed in the BSI I now find I have a funny with the electric windows. The switches on the drivers door for the rears will open the windows but not close them. If you press to close it opens them also. When the wipers are activated the windows will open rather than close. The window close button on the fob will also cause the rears to open. The window buttons on the rear doors work as they are supposed to, so it appears all commands via the window ecu are set to open.

I would hope the problem is not the fresh BSI but that wouldn't surprise me. I have tried to discover the location of the window ecu without success, is it within the door as it doesn't show on any of the exploded views I've found? It doesn't show any faults on the Lexia, but then niether did the BSI.

[myglaren]

I had that a while back.
Pop the controls out of the door and dismantle, clean the contacts with the rubber on a pencil or a cotton wool bud and some isopropanol or contact cleaner - not WD4.

[Gibbo2286]

Can you tell me where I can get one of those leccy widows?

[GiveMeABreak]

Ditto that Steve, that worked for a while on my MK1, but after further issues, I ended up having to replace the button module - comes as a complete unit and that fixed it. It's always where the water drops go when you open the doors and it's raining. I'm paranoid about that now - always wiping the rain off straight away

[GiveMeABreak]

I have tried to discover the location of the window ecu without success, is it within the door as it doesn't show on any of the exploded views I've found? It doesn't show any faults on the Lexia, but then niether did the BSI.

On your car, the windows are commanded so:
Control of the Front Windows from the Driver's Control Panel:

• A command on one of the window switches creates a level of voltage specific to the command;
  the Door Module detects the level of voltage and transmits to the BSI a multiplexed message for the desired command;
  the BSI retransmits to the door module a multiplexed message for actioning the front window;
  the door module actuates the window motor.

Control of Front Passenger Windows:

• A command on the windows switch creates a numeric message (2 bits) representing the desired command;
  the door module analyses the numeric message and transits a multiplexed message to the BSI for the desired command;
  the BSI retransmits to the door module a multiplexed message for actioning the front window;
  the door module actuates the window motor.

Control of the Rear Windows from the Driver's Door Control Panel

• A command on one of the window switches creates a level of voltage specific to the command;
  the Door Module detects the level of voltage and transmits to the BSI a multiplexed message for the desired command;
  The BSI cuts the command to deactivate the rear windows. The authorisation warning lamp goes out;
  the BSI commands the movement of the window.

Control or rear Windows from Rear Passenger Switch:

• A command on the rear window switch creates a binary message which is detected by the window computer of the corresponding door;
  the window motor is actioned in the desired direction of rotation.

There are subtle differences in operation, depending on where the windows are activated from! Not sure this will help but they don't mention an ECU as such only the Driver's 'window station' and the 'window computer' - so I guess this is the same thing back in 2001!

[Stempy]

I've tried cleaning up the switch module but no difference. Will have to fire up the Lexia again and check the switches are registering at the BSI. The stange thing is the rear windows will just open on their own without touching anything. I suspect the 'door module' option on the Lexia is a combination of switch module, window regulator module and BSI rather than a specific ecu.

[Stempy]

Well I did a BSI reset today as I had to disconnect the battery to replace the mirror temp sensor. Still the rear windows are playing silly buffers. Hooked up the Lexia and even from the actuator test page I can only make them open, no closing at all. All the switches register as operating correctly on the Lexia so I'm stumped as to what to try next. It seems to be a BSI issue.

[GiveMeABreak]

Just a small thing here, but have you reset anti pinch on these? Manually lifting button to first notch only a bit at a time until it reaches the top and you get resistance then a click?
Failing that - here's a chap repairing a Peugeot control module (corrosion on the circuit - probably water).
Can't remember - are they going up / down from the driver's control module or is it just the just the individual rear door switches that aren't working? If it's the driver's module that's not working - worth a look as per the vid - as guaranteed it will be the rain most likely!

[Stempy]

The rear door switches work fine up down auto manual. The front drivers door module registers all switches working correctly on the Lexia readout, yet the rear window go down whether you select up or down on the switches. The fob will lower the windows but not close them. The rain makes them open instead of close. I have stripped and cleaned the drivers door switch module. There was no corrosion evident, looked good as new. Have tried resetting the anti pinch which worked once on one side for about 10 minutes, then the problem returned.

[GiveMeABreak]

I've done it again and forgot the link!
The top video:

[GiveMeABreak]

Stempy, have a squiz through this: all about the BSI and the Windows.
http://service.citroen.com/dtt/IFD/AC/d ... iag161.pdf

[Stempy]

Both very interesting. The door switch circuit board is a more flimsy affair on mine so I wouldn't want to attack it with wet and dry but I will take a closer look to see if there is the likelyhood of any tracking between the conductors. It looked pretty clean at first glance so I just rubbed it over with switch cleaner. Looking at the fault flow chart it would indicate that the BSI is not to blame. It has to be something that relates to both windows though and any tracking on a system that relies on resistance is sure to confuse things.

[Stempy]

So I cleaned the switch pcb to a sparkling sheen but still the rears are acting up. To infuriate me even more the mirror select knob fell to pieces having been removed one too many times, so for now I've just pulled the rear window fuse, that way at least I won't come back to the car with the rear windows down and full of rain.

[djoptix]

Those window switches are a bag of s**t. Top Gear were bang on (in their Peugeot pisstake) about them.

However, the fact that your car opens the windows when it rains is hilarious (sorry) there but for the grace of the PSA gods go I...

[GiveMeABreak]

To infuriate me even more the mirror select knob fell to pieces having been removed one too many times, so for now I've just pulled the rear window fuse, that way at least I won't come back to the car with the rear windows down and full of rain.

Well I did need a bit of a laugh as I'm a) in the middle of looking at someone else's DPF issues, b) stripping down and replacing the digitiser and screen on an iPhone, C) Consoling a mate who's just laid out £500 on parts and labour on his C3 for an Air Intake Throttle Valve Housing and Tappets adjustment, and to top it all, D) I've just found Titanic sized proportions of water and condensation in my front fog / indicator lamp, which I've now got to strip off tomorrow and dry out before the damned MOT on Tuesday! Stress ....