Citroen C5 (facelift) Suspension Pump Problem

[Tsunami]

Hi all,

I have bought 06 Citroen C5 (facelift) II 1.6HDi five months ago. I counldn't investigate too much when i had bought it. And after 3 days later, while i was trying the suspension, i saw some smoke near right head light. I stopped the engine and removed cables from the battery. Then i dismantled the right head light and bumper for clearly saw what happened. I saw that there were some cables burned and the electric motor was damaged.




The BHI and the pump motor was badly repaired before i had bought. There were no socket on the old electric motor. They were directly connected the motor with relays. And they were soldered a cable inside the BHI to control the relays.




I have bought a new used pump and mounted it yesterday. But there was a problem. There is no any thin cable (one thin cable with socket). I found a purple thin cable which was cutted before. I have connected it to small connector on the electric motor. But i don't know it is true or not.



And i have filled the reservoir then tried to start the engine. But the car wasn't raised. And an error code seen on dashboard which is suspension failure. When i pushed the raise button, maximum height written on dashboard but actually not.

1. I don't have Lexia to defined the BHI to BSI.
2. I don't do bleeding operation. Only fill the reservoir then start the engine.
3. I don't know the correct cable which is for control the motor. (I have connected purple cable)
4. I don't know the part code of the old pump, the was no label on the BHI. And there is one character missing on new used one.
5. I didn't check the maxi fuses but i think that they are ok.

And I don't know what i have to do. Please help me.

[Hell Razor5543]

You will need to pressurise the LDS reservoir first (so that the pump gets primed). It does not need much pressure, about 7PSI (or 0.5BAR). What some people do is to fit buy a second hand reservoir cap, fit a tyre valve to it, pop it onto the reservoir (keeping the normal cap safe) and them pump that up using a bicycle pump.

I do NOT know if this will fix your problem, but you WILL need to get the reservoir pressurised. Once the suspension is working you can undo the cap safely (just carefully, so the cap does not leap off) and fit the normal cap; the pressure is only needed to prime the pump.

[myglaren]

First thing I would do would be to check the maxi-fuse as this often blows when the motor develops a fault.

[GiveMeABreak]

If after trying all the above tips, you think you may need a new or second hand unit, let me know your 17 digit VIN number and I'll be able to get you the part number.

[Tsunami]

If the pump is not primed, is it runs or not? I think it must be turns. It will hard to prime. I don't have spare cap. But i can try it adding some piece of hose to return pipe and connect bicycle pump with T-fitting. I am thinking about adding a led paralel to motor armature winding brushes to see it runs or not.

VIN number is VF7**************[VIN obfuscated, can be read by forum staff]. By the way new used pump is X3.

[Hell Razor5543]

I would go down to your local scrap yard to see if there were any compatible C5s there, and then buy a cap from them.

[Tsunami]

I have tried to find cap but i couldn't.

[GiveMeABreak]

I haven't managed to find one with that part number anywhere as yet. As you probably know, these pumps have not been available from Citroen for some time now. Your PSA part numbers are:
5277 A1 (part to be configured)
5277 A2 (Part configured for vehicle)

If you can get a pump from the same model you should be ok. I've lifted this relevant extract from 'Wheeler' from an older post - but helps with location of the maxi fuse and the programming options:

Good point about the maxi fuses, the BHI main fuse is hidden beneath the under bonnet fusebox, you need to partially remove it to see & check them.
If you get a 2nd hand one off a similar spec car there should be no need to program anything. If i remember right there are only 3 options to program in the BHI. Tyre size, whether it has Xenons or not & whether it has variable power steering (which i believe is only the V6 models).
As for the extra return pipe, if you buy a new one from Citroen there was a superseded part & it comes with a blanking off kit.

There are several pumps available from these suppliers, but not the exact one that you need. The estate versions are probably slightly more heavy duty for the additional weight they carry - but I can't confirm this for sure.

This Dutch company offer several:
https://bartebben.com/online-parts-sear ... Stap4=true

and a few on ebay UK here -
http://www.ebay.co.uk/itm/2005-mk2-Citr ... SwYIxX4vqM

[Tsunami]

I found something suspicious. But i don't know correct value of the fuse.

[Paul-R]

It says on it 80. So that's an 80 amp maxi-fuse.

[Gibbo2286]

If the pump is not primed, is it runs or not? I think it must be turns. It will hard to prime. I don't have spare cap. But i can try it adding some piece of hose to return pipe and connect bicycle pump with T-fitting. I am thinking about adding a led paralel to motor armature winding brushes to see it runs or not.

VIN number is VF7**************[VIN obfuscated, can be read by forum staff]. By the way new used pump is X3.

You should hear the pump running even if it is not primed. If you can't hear it run then you need to test its electrics, you can do that by checking that there is 12v between the two heavy pump wires, if that's ok run a live wire to the third connector (the one with the thin wire) and the pump should run, if it doesn't the pump is faulty.

[GiveMeABreak]

This is not the first time we have heard of this issue regarding the suspension Maxi Fuse. According to the wiring diagrams for your car, Maxi Fuse 8 (MF8) is 40A and that is for the Central Electronic Block Motor - which should be the suspension pump motor. So it is possible that this has been changed by somebody for a higher amp fuse because it kept blowing. It does not address the underlying issue of why it is blowing of course. The motor is obviously under strain and drawing a higher current. I'm sure I've read of some who have stripped the unit down and cleaned up all the muck from the motor brushes. Here's a few pics further down in the thread:

http://www.aussiefrogs.com/forum/citro% ... usted.html

[citroenxm]

I discovered that X7 c5 pumps will fit MK.1 cars too BUT the top mounted ecu needs swapping over but that is also not an issue just simply undo the screws holding the ecu to the motor and swap it across. The same motor/pump has been used right from the birth of lds to the end.
when I swapped there was no need to lexia it in or anything.. I pressured a system by throughly cleaning the filler neck and simply blowing and applying pressure from my own lungs.. it worked.