Stephen79

A little update. I fitted the suspension pump from a 2004 c5 hdi and reconnected the command wire and multi plug, refilled the lds reservoir and reconnected the battery, started up the car but unfortunately I still have the message 'serious suspension fault'. It's looking like I need lexia involved which I unfortunately do not have nor am I in a position to purchase at the moment. It's probably no use doing a BSI reset but I might try that at the weekend. I'm feeling a bit deflated like the car! I thought I had it cracked when I saw the command wire disconnected but maybe the suspension is 'locked out' or something like that..

Thank you Paul.

Time will tell! With a bit of luck I might find some time to fit the pump this week. I'm itching to get it fitted to see if it works! If it works I will be elated but if not then the car could be on borrowed time.. Will update as soon as I get the pump back in. Incidentally what is the Capacity of the LDS reservoir/system? Thanks for the help.

I think you may have misunderstood me Paul, someone had the suspension pump multi plug removed before I acquired the car, I wasn't familiar with the setup so connected the battery and went through the BSI reset. It was only when I was digging around the pump after checking the fuses that I realised the connector was off the pump. I took the pump off the other day and tested it off a battery and the motor is spinning but I discovered that not only was the multi plug removed but someone had the single 'command' wire disconnected too! I'm going to fit a pump I took out of a 2004 car seeing as I went to the trouble of removing it. Might be a few weeks before I get back at this but at least I seem to be making progress. Thanks for opinions and assistance.

I finally got around to removing the hydraulic pump/bhi unit, a pig of a job when you can't jack the car up. I managed to prise open the bumper and remove the mounting nuts and pipe. I will try fitting another pump but am starting to wonder is my main issue that someone disconnected the multi plug on the ECU above the pump while the battery was connected.. Any advice or opinions welcome? I read a post from a few years ago and the poster said never to remove the multi plug with the battery connected as it will log a serious suspension fault. My car displays this message.. Having gone this far I will try another pump and fingers crossed! It would be a shame to scrap the car as it runs beautifully.

Thanks Paul. I saw a connector plug on the side of the additive tank with two wires in it so I wasn't sure was that a pump or a level indicator. That unit must be faulty. Thanks for clearing that up for me. Not sure whether the fuel is being dosed with the additive but the car flew through its last test emissions wise anyway. I have been driving it away anyway although it seems a bit hard on diesel. Although two wet looking injectors might not be helping that.

I don't think this has the 'accumulator' sphere, unless your model has the hydractive 3+ suspension which has the third spheres on the firmness regulators.

I have a fault in my 2007 1.6 hdi C5 'additive pump open circuit/shorted to ground'.. Does anyone know where the blooming pump is?! Is it in the additive tank itself? I keep getting the dash message 'additive level low', I took down the tank to check and found it was full! Unfortunately my ds150 copy won't allow me to reset the counter. Any help appreciated with this. Thanks.

Problem sorted. I splashed out on some genuine Citroen spheres.. €354! That's euro. This seems to have cured the bouncy suspension. I could have spent €120 on the lizarte spheres again but if they are only going to last another 12 months I felt there was no point. The genuine parts are ridiculously expensive though.. Looks like beans and toast for the month ahead..

I blanked the EGR on my 2007 1.6 HDI with great success. Engine management light is operating correctly too. I was afraid it would stay on. Obviously in my diagnostic check there is a fault 'EGR insufficient airflow' but that was to be expected.

Thanks for the reply Mike. I think this car only has 4 spheres. Is not the hydractive3+ that has the middle sphere front and rear? I'm fairly certain the correct spheres were fitted. I will check the height corrector when I can next week.

Cheers Paul and thanks for the link. I will be lost without the diagrams although I'm 99% sure the pump is the fault.

I recently acquired a 2007 C5 1.6 HDI from an uncle of mine. The car needs a lot of little jobs. It kept cutting out on him but after sticking a new battery in it everything seems ok for me. I put 4 lizarte spheres into the car 12 months ago. Now however the back of the car is extremely bouncy. If you put your foot on the towbar and let go the car springs right back up, no resistance whatsoever and driving along it pitches a lot when you press the brake. My question is, are the rear spheres gone already after only 12 months? It would seem strange if they are. When you get into the car you can hear the pump working and the car rises, I am a little confused! Any help or advice greatly appreciated.

Does anyone know where I might acquire wiring diagrams for a 2.2 HDI C5. I am testing the wiring at the plug entering the hydraulic pump and I have a few lives but I don't know what's doing what. I could probably check my 04 2.0 HDI and cross reference but a diagram would be handy. Any help appreciated.

This evening I decided to see if I could jack up the rear of the car to check if the rear height adjuster was seized.. Unfortunately the car really is sitting at rock bottom and my jack wouldn't fit under it! It seems I will have to get the suspension pump working. It was too cold tonight to stay outside for too long so I will revisit it at the weekend if I get a chance. I must check the wiring on my 2004 2.0hdi for reference before I remove its suspension pump.

I checked all the maxi fuses yesterday while testing the engine bay fuse box. They are all perfect. I'm familiar with the height sensors alright so I will check them out when I get a chance. You could be right about them being seized as the rear of the car is on the ground. Hopefully I can get my trolley jack under it! As far as I know the car hasn't been run in 4 to 5 years so that hasn't helped matters. Thanks Coastline for your advice and support and the kind offer of a pump if I need it. Would the pump out of a 2004 2.0hdi suit? I have one of those parked up and realistically it won't be hitting the road again though there is essentially nothing wrong with it other than being a bit tatty.

I am thinking that perhaps the hydraulic suspension pump is knackered having sat down and taken stock of my work today. There is no noise from that area so it must be dead? Also after going over my diagnostics there appears to be no voltage at the ABS control unit so perhaps I have wiring issues.

Thank you to all for your replies and advice. I went at the car this afternoon and removed the shunt fuse and performed the BSI reset as Coastline suggested. At first it didn't seem to work and the hazard lights kept coming on when the battery was reconnected. I kept checking for faults using my Delphi diagnostic, I also checked all the engine bay fuses for current. While in the engine bay I noticed a disconnected multi plug under the hydraulic pump.. Reconnected this and performed the previous operations. After this the car started! However it's a bit bitter sweet as on the dash it's displaying 'serious suspension fault' and the suspension is unresponsive. If you press the suspension button the dash displays an outline of the car with an X through the car. Also the ABS doesn't seem to be communicating with the BSI. However the car selected gear and moved a bit which is great news in my book! I'm presuming I need to invest in lexia to diagnose the suspension issues? At least it's running which I am delighted about. Also the key fob is unresponsive in locking/unlocking the car even with a new battery in it. The buttons seem sticky, unfortunately there is no second key. Thanks again for all the assistance. I'm getting there by degrees.

Thank you so much for the positive outlook and the helpful advice Coastline. Much appreciated. I will do everything you listed on Saturday and report back with the results. Fingers crossed it will give the C5 a lifeline! I don't really want to send it off to the scrapper but my wife was shaking her head when she realised what I was dragging into the driveway last month! Love to prove her wrong!

My 1.6 hdi is just very oily, the orange rubber at the intake side of the turbo is split and a couple of the injectors are wet looking so this needs further investigation along with two new spheres being needed at the rear.. Lots of little things! 2.2 is cranking fast enough but there is a genuine immobiliser fault so need. Must check on my Delphi to see if it recognises the key. I really need to invest in lexia but that will have to wait until next month unfortunately! I think a lot of things are dead on the 2.2 as the suspension is doing nothing.. It's only a project really and if it's going to cost big money to get it sorted then I won't bother but I do like a challenge. Might be just a wiring issue or something simple.. Or maybe not!

The guy that owned it previously was a former Citroen main dealer but he was sketchy about the problems with it. It's turning over fine on the starter just not firing. It's rolling as well so brakes aren't completely stuck on. It's probably not worth doing it up really but I am a heavy vehicle mechanic by trade so not afraid of getting stuck into it. It's sitting on driveway outside the house so I can just do a bit every evening weather permitting. If I got it running and the suspension to rise it would be a good start. It wouldn't bother me putting €700 or €800 into if I had a good car at the end of it. But it's true, I don't need my heart ruling my head! I also have an 07 1.6hdi that's a bit of a fixer upper too so plenty to empty my wallet!

I may have to invest in lexia so! Unfortunately the car has no spare key but I might stick a battery in the key fob. The battery is only a spare I have in the shed so voltage could very well be down. The car has the look of a car that was loved one time so would be a shame to scrap it. Thanks for the advice Paul.

Hi. Thanks in advance if anyone can assist me. Basically I took pity on a 2001 2.2 hdi auto that was heading for the crusher and wasted €300 on it. I know nothing about it other than it is telling me on the dash that I have an immobiliser problem and won't start. It also has a braking problem.. Suitably vague! I connected my knock off DS150 to it but it will not connect to the engine ECU, it connected to all the other systems so I cleared a large number of faults. After connecting the battery the suspension is doing nothing, does the car need to be running for it to rise or is my battery voltage too low? I will check the fuses tomorrow. Car has been off the road since 2011. It was originally a UK car although it's in Ireland since 2002. It has a low mileage of only 114k miles and is amazingly straight so I'm hoping to get it back on the road. Having said that if it's going to be a complete money pit I won't be going too far with it. I may also have access to 2003 2.2 hdi auto for parts so that might help. Hopefully I can get a few pics up in the next couple of days.

Hello, Stephen is the name and I just signed up to the forum. I am from Ireland and recently acquired a dead 2001 C5 2.2 hdi automatic. I wasn't specifically looking for one but stumbled on this car and felt sorry for it as it was heading to the scrap yard if I didn't take it. I had many Citroens over the years, mainly 2CV and GSA models. I drifted away from them but Loved them all and loads of regrets for not holding on to some of them but such is life!