This is on my latest 406, I have fixed most of the other faults but had forgotten about this, I attacked it today thinking it would be simple ...
There is voltage on the brown lead which I assume is park but nothing on the other one, on looking at the circuit diagram I was horrified to find that both leads come from the BSI. I have had the pp2000 on it but it wont talk to me or the car, keeps telling me its not connected but it is and the light is on., I have tried both Lexias on both cars and can't get any sense out of either of them, is it my computer?
I can't rationalise the frequently random behaviour of PP2k comms, but I would be thinking snapped cables in the rear door wiring loom as more likely suspects for this kind of problem. Changing them is a pig, but proving whether you have continuity between the connectors near the fixed end of the hinge and (for example) the wiper motor connector is fairly easy.
Had this problem with my Xsara estate and my bro's 306 estate and his D8 406 estate.
2002 HDi 2.2 Exec Estate, (2008-12) (wonderful)
2003 HDi 2.2 6-speed Exec Estate (2012-19) (also a gem)
2009 Citroen C5 2.0 HDi VTR+ Estate (godawful heap)
2008 BMW E91 330i touring (great fun - murdered by a reversing SUV)
2007 BMW E91 325i touring (slower smoother quieter)
I suspect a duff PP lead is more likely than your pc Try reinstalling PP first, then clock the leads.
I've done it meself, we have so much confidence in modern* electronic gizmos we suspect them first, rather than go for the traditional stuff we've known about for decades What would it be, ecu paranoia? Ecunoia? Multiperplexity?
I have two Lexia's and two complete leads and the effect is the same on all of them, I frequently have problems getting it to connect but this time it resolutely refuses. The laptop I am using is very old and slow, maybe it needs updating, it could take up to half an hour to get it to work before.
Most problems I have been able to sort without the PP2000 so I shall probably continue to do so.
Had similar on my 406 rapier estate.... wiper died at 2 o clock position and after testing for voltage, which I had, I left it for 5 months hoping I might drop by a scrapyard. I then heard that a solution for this is to spray penetrating oil down the wiper spindle and then turn on and push the wiper over manually and pull back. Did this until all loosened and it has worked perfectly ever since. Got a lot of use yesterday mind.
I have done further investigation and find that there is no voltage on the 'go' lead but there is on park, I suspected as suggested by someone else that the lead was broken where it goes between tailgate and body, I have had this problem on other cars, I thought I would be able to tell by measuring its resistance to earth, to my surprise it was a dead short, I had another look at the circuit diagram and found a relay in the BSI, which is where the lead went which when not activated connects the lead to earth, so nothing wrong with the wiring.
I have three handbooks which all show a different fuse layout and all different from mine, what I did discover though was that there is a fuse on the BSI for the rear wiper, I have a spare unit and found it on there. If the fuse has gone it probably points to a faulty motor but that's not a problem as I have a complete spare car - minus the bit I have already taken off!
All I have to to now is get to the BSI and remove the fuse
The one on my D8 came pre-seized, the previous owner (a mechanic ) had tried to have it apart but only succeeded in breaking the casing, then just stuffed it back, removing the relay to stop it even trying to work . I un-seized it and glued the casing back together, I can't remember what I used but it was still going when I flogged it 4 years later.
Try reinstalling PP first, then clock the leads.
What would it be, ecu paranoia? Ecunoia? Multiperplexity?
) had tried to have it apart but only succeeded in breaking the casing, then just stuffed it back, removing the relay to stop it even trying to work . I un-seized it and glued the casing back together, I can't remember what I used but it was still going when I flogged it 4 years later.