My Citroen XM 3.0 PR-Vestige

The place to show off and tell us all about your XMs (or even other cars). Should it be a big project, or just some general pics, start your thread in here.
User avatar
Dean
Global Moderator
Posts: 5892
Joined: Wed Apr 15, 2009 7:53 am
Location: Isle of wight

Re: My Citroen XM 3.0 PR-Vestige

Post by Dean » Mon Aug 06, 2018 10:12 pm

I did check the electrovalve against those specs and it checks out fine from the multiplug by the strut top on the drivers side, i also managed to check the the body movement sensor and the steering angle sensor and they are fine too, so................i gave up and continued to drive it with the ECU plugged back in.

This weekend i went snorkeling with the little one and decided to take the XM, what was surprising was that from first starting the sport light stayed on as the switch was left in sport mode some time ago so i could see if the system came back to life, the suspension has worked faultlessly since with not the smallest hint of a problem..................

This is confusing and annoying but it is now working so.........

D
92 Citroen XM Prestige 3.0i Auto R.P5678
14 Mitsubishi L200 Trojan
89 Talbot Express motorhome Auto-Trail coachbuilt (looking for bonnet, wings, scuttle panels etc)

Addicted to Crackanory

User avatar
White Exec
Citroen God!
Posts: 4563
Joined: Fri Mar 11, 2011 7:38 pm
Orga / RP numbers: RP7165
1996 2.5TD saloon, manual, Polar White
Location: ex-Ealing, Cheshire, W.Sussex & Surrey. Now living in Sayalonga (Malaga, Spain)

Re: My Citroen XM 3.0 PR-Vestige

Post by White Exec » Tue Aug 07, 2018 5:49 am

Sod's Law. Maybe a connection disturbed and now working.
Enjoy while it's working!
Chris
1996 XM 2.5TD Exclusive RP7165 Polar White
2003 RAV4 D4D 2.0 5dr LHD Silver WORKHORSE
1989 BX19RD Delage Red Deceased; 1998 ZX 1.9D Avantage auto Triton Green Company car 1998-2001; 2001 Xantia 1.8i auto Wicked Red Company car 2001-2003

User avatar
Dean
Global Moderator
Posts: 5892
Joined: Wed Apr 15, 2009 7:53 am
Location: Isle of wight

Re: My Citroen XM 3.0 PR-Vestige

Post by Dean » Tue Aug 14, 2018 7:46 pm

Car spotting in Ireland
You do not have the required permissions to view the files attached to this post.
92 Citroen XM Prestige 3.0i Auto R.P5678
14 Mitsubishi L200 Trojan
89 Talbot Express motorhome Auto-Trail coachbuilt (looking for bonnet, wings, scuttle panels etc)

Addicted to Crackanory

User avatar
Dean
Global Moderator
Posts: 5892
Joined: Wed Apr 15, 2009 7:53 am
Location: Isle of wight

Re: My Citroen XM 3.0 PR-Vestige

Post by Dean » Tue Sep 11, 2018 10:28 am

Getting the XM ready for the Isle of Wight car show this coming weekend at the moment, and the fast approaching winter layup.
Looking back through the history I noticed it's been over 8 years since my last LHM change so bought 5ltrs on eBay for £30 and did the deed last night, the fluid still looked pretty clean and the filters only had a few bits in them, water however was plentiful in the tank, looked like hundreds of little flat marbles rolling around in the bottom of the waste oil can so clad it was changed. Priming the pump was a bit of a pain again but all went well in the end.

Next job is to look at the cooling fans, I only ever get both fans on together running slowly with the a/c or 1 fan if the engine gets too warm even when at 100oC so I wonder if there is a duff relay preventing full speed operation, I am still running the 2.0i bitron controller too so I think that needs swapping out, if I can remember which one it is.

D
92 Citroen XM Prestige 3.0i Auto R.P5678
14 Mitsubishi L200 Trojan
89 Talbot Express motorhome Auto-Trail coachbuilt (looking for bonnet, wings, scuttle panels etc)

Addicted to Crackanory

User avatar
White Exec
Citroen God!
Posts: 4563
Joined: Fri Mar 11, 2011 7:38 pm
Orga / RP numbers: RP7165
1996 2.5TD saloon, manual, Polar White
Location: ex-Ealing, Cheshire, W.Sussex & Surrey. Now living in Sayalonga (Malaga, Spain)

Re: My Citroen XM 3.0 PR-Vestige

Post by White Exec » Tue Sep 11, 2018 4:06 pm

If you get only one fan running when High Speed triggers, but both running on Slow, it's for certain a dirty relay contact or base connection.

Lots of water in LHM tank sounds a bit grim - how did it get there?
Thank heavens LHM isn't hygroscopic!
Chris
1996 XM 2.5TD Exclusive RP7165 Polar White
2003 RAV4 D4D 2.0 5dr LHD Silver WORKHORSE
1989 BX19RD Delage Red Deceased; 1998 ZX 1.9D Avantage auto Triton Green Company car 1998-2001; 2001 Xantia 1.8i auto Wicked Red Company car 2001-2003

User avatar
Dean
Global Moderator
Posts: 5892
Joined: Wed Apr 15, 2009 7:53 am
Location: Isle of wight

Re: My Citroen XM 3.0 PR-Vestige

Post by Dean » Tue Sep 11, 2018 4:37 pm

I would imagine 8 years of condensation in the tank is the cause, i hope it is just a relay but i want to swap the controller first, i think that turns the fans on at th right temperature depending on engine, the PRV engine has a bit of an odd coolant sensor positioning with the ECU seeing combined hotest water from both heads exiting the block as does the guages but the fan sensor is positioned on the old end of the front head, which is the coolest of the two. The 2.0i engine has all the temp sensors in the hotest water at the thermostat housing so if the fans were turned on at 90oC on that engine that was the hotest part of the water jacket but with the PRV the fan sensor will be seeing maybe 80oC in its location when the water flowing out of the heads to the rad is nearer 90oC.

Cannot remember exactly but there was a good 10oC difference in coolant temp between the two sensor locations, an issue not present with the 2.0i engine.

D
92 Citroen XM Prestige 3.0i Auto R.P5678
14 Mitsubishi L200 Trojan
89 Talbot Express motorhome Auto-Trail coachbuilt (looking for bonnet, wings, scuttle panels etc)

Addicted to Crackanory

User avatar
White Exec
Citroen God!
Posts: 4563
Joined: Fri Mar 11, 2011 7:38 pm
Orga / RP numbers: RP7165
1996 2.5TD saloon, manual, Polar White
Location: ex-Ealing, Cheshire, W.Sussex & Surrey. Now living in Sayalonga (Malaga, Spain)

Re: My Citroen XM 3.0 PR-Vestige

Post by White Exec » Tue Sep 11, 2018 7:34 pm

Hi Dean,

Have just put together some info on the triple relays, here: viewtopic.php?f=13&t=9137#p110734.
Your loss of one fan at High Speed will be one of the 4-pin relays at fault.
As Slow and one fan at High Speed operate ok, fault not likely to be further upstream.
The controller simply calls for Slow or Fast, but it's the relays that turn on the fans, either in series or parallel.
Chris
1996 XM 2.5TD Exclusive RP7165 Polar White
2003 RAV4 D4D 2.0 5dr LHD Silver WORKHORSE
1989 BX19RD Delage Red Deceased; 1998 ZX 1.9D Avantage auto Triton Green Company car 1998-2001; 2001 Xantia 1.8i auto Wicked Red Company car 2001-2003

Post Reply