citroen c5 x7 2008

[Sergiu]

I was the one who (always) managed to get the pump going simply by blowing through my "funnelled" hand into the reservoir.
It does not need much pressure to get things going.
You can always "seal it with a kiss" and blow directly (not recommended, although my friend does it that way because it's easier).

I pump around 8 to 10 psi in to the tank and nothing happened, the pump is still not working

[KennyW]

Check the 40 amp maxi fuse depending year of car is either under engine fuse box or in red box to the side of fuse box next to wing.

Remember if this has blown, the hydraulic pump maybe full of sludge and requires cleaning. Plenty of threads on here about that.

Kenny

[Sergiu]

Check the 40 amp maxi fuse depending year of car is either under engine fuse box or in red box to the side of fuse box next to wing.

Remember if this has blown, the hydraulic pump maybe full of sludge and requires cleaning. Plenty of threads on here about that.

Kenny

I check fuses and clean the pump, i don't have a fault on dash now

[KennyW]

Is the pump working ?

If so did you move the height from low to high after pressurising the system.

Kenny

[dulenator]

@Sergiu
Sorry, I was busy and didn't see your message.
Yeah, the pump needs to be running, and then the tank needs to be pressurised.

[Sergiu]

Is the pump working ?

If so did you move the height from low to high after pressurising the system.

Kenny

the pump works only when i connect directly, but when is conected to the car is not working,

[Sergiu]

@Sergiu
Sorry, I was busy and didn't see your message.
Yeah, the pump needs to be running, and then the tank needs to be pressurised.

my pump does not start, it just stop working on the way to work, i get that fault in the dashboard, and after that i connect lexia, and when i test the pump, is dead, does not seems to work, I am affraid that the pump is gone, that's why i ask you guys, maybe you had a similar problem and you find how to fix it, the faults say no comunication with the height sensors, but both of them are 6 months old,

and even if the sensor will be the problem, i should be able to test the pump and hear it working

[Kees]

Hai,
Did you check fuse G39 ? 10 A (red)
The location is in fuse box BFH1.
You find this behind the glove box, you have to remove this, but also the parts which hold the glove box.
You can see this fuses on the right side
Greetings,
Kees.
P.S. this is for a left hand steering!!

[Jay-Bruce]

Remove the larger plug from the pump motor, which is the one that provides power to the motor, and check for voltage across the pins of it. If you don't have power there, it would suggest the 40a maxi fuse on the back of the engine bay fuse box is blown.

[Kees]

Because he says before, that the high sensors gives a fault on the lexia/diagbox it seems to me, there is a problem with the BHI. The main fuse of this is G39!!
If this fuse is blown, nothing of the hydraulic system works included the h.p. pomp. And you get the message "suspension error, maximum speed 90 Km/H" !!

[Kees]

If G39 is oke, then check fuse MF2 in fuse box PSF1, This is the supply for fuse G39.
Greetings,
Kees.

[Sergiu]

If G39 is oke, then check fuse MF2 in fuse box PSF1, This is the supply for fuse G39.
Greetings,
Kees.

so because you tell me to check fuses, i just go yesterday to the car again and start to check,
and I find a broken fuse F1 in fuse box BFDB, I will replace it today and see how it's going, that's the power to pump. I open that box before and everything was clean there, and now when this situation happen I did not have the right toll to open it, ( you need m8 socket ) so I was think that should be ok. I will write another comment when I'll replace that fuse, and let you know if it's working.

[Kees]

Well, I'm sorry to tell you, but if this fuse is blown, 9 out of 10 means, that the pomp is broken. This fuse is 40 A.
Greetings,
Kees.

[Sergiu]

Well, I'm sorry to tell you, but if this fuse is blown, 9 out of 10 means, that the pomp is broken. This fuse is 40 A.
Greetings,
Kees.

I change the fuse and it blown again, so you think the pump is gone yes? I put a wire there instead, and pump did not start, after this I connect the pump directly to the battery and it runs ok, I don't know how this works, hands down

[GiveMeABreak]

DO NOT bypass the fuse! This may cause a fire otherwise - this is why we have fuses. I suspect your pump motor has been contaminated with LDS fluid which can seep in from over spills from the LDS tank. The oil then mixes with the worn carbon dust to create a paste that then causes overheating / shorting out.

Have a look at this very detailed post with photos to show the repair:

viewtopic.php?p=581404