c5 fuse box b
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Re: c5 fuse box b
thanks GiveMeABreak, but i cannot raise the car to normal height or the highest setting and that seems to be the way to bleed it
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Re: c5 fuse box b
Ok, so if you are sure the pump motor is operating (should be easy to hear that), you may have introduced air into the system when you disconnected the LDS tank hose supplying the fluid to the pump.
If the system has depressurised, then you may need to introduce 0.5 Bar of pressure into the tank, whilst the engine is running to get the car to rise - but it can take some minutes to do after it has been depressurised. Whilst it is flat on the floor, try bleeding it anyway by very slowly turning the wheel from lock to lock a few times. This will allow the fluid to circulate and get any air out - but may take a good few attempts.
If the system has depressurised, then you may need to introduce 0.5 Bar of pressure into the tank, whilst the engine is running to get the car to rise - but it can take some minutes to do after it has been depressurised. Whilst it is flat on the floor, try bleeding it anyway by very slowly turning the wheel from lock to lock a few times. This will allow the fluid to circulate and get any air out - but may take a good few attempts.
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Marc
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Re: c5 fuse box b
I cannot personally confirm this will work, but citroenxm has said he was able to pressurise the system by blowing hard into the reservoir. I would imagine he did this by initially setting the suspension to a working height, turning the engine on, and then (sealing his lips around the opening in the tank with the cap removed) blowing hard into the tank.
James
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Re: c5 fuse box b
that image will be hard to remove from my mind !
Alasdair
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Re: c5 fuse box b
And even more difficult to remove the taste from his mouth.
Man is, by nature, a lazy beast, he does not need twice encouraging to do nothing.
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Re: c5 fuse box b
I bought (from a scrapyard) an LDS reservoir cap, drilled a hole in it, and fitted a tyre valve. Now all I will have to do (to re-pressurise the system) is to fit this cap, start the engine, set a height, and give a couple of strokes with a bicycle pump.
James
ex BX 1.9
ex Xantia 2.0HDi SX
ex Xantia 2.0HDi LX
Ex C5 2.0HDi VTR
Ex C5 2.0HDi VTR
C5 2.2HDi VTX+
Yes, I am paranoid, but am I paranoid ENOUGH?
Out amongst the stars, looking for a world of my own!
ex BX 1.9
ex Xantia 2.0HDi SX
ex Xantia 2.0HDi LX
Ex C5 2.0HDi VTR
Ex C5 2.0HDi VTR
C5 2.2HDi VTX+
Yes, I am paranoid, but am I paranoid ENOUGH?
Out amongst the stars, looking for a world of my own!
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- Posts: 44
- Joined: 20 Nov 2016, 11:18
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c5 2.2d auto estate-spare parts
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01 xantia 1.9d estate gone
98 xantia 1.9d estate gone
97 xara 1.4 gone
99 saxo 1.1 gone
85 cx2500d gone but not forgotten
and several million mk6 transits
Re: c5 fuse box b
so heres where im at, pump works when it should, no bubbles in fluid, i can pressurise the fluid so that the container expands a little -so that should be enough. pump will run forever if i turn on the engine, although i stop it after a few mins and the car is still on the deck.
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Re: c5 fuse box b
Then I'd suggest you take a closer look at the height correctors and especially the connectors to them, are they copper corroded?
Man is, by nature, a lazy beast, he does not need twice encouraging to do nothing.
- GiveMeABreak
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Re: c5 fuse box b
I think it extremely unlikely that both the height sensors would of failed to operate at the same time Eric and would of given some indication of prior failure - riding too high or too low at either the font or rear - but for both to go just like that is extremely unlikely.
I'm going back to basics and will be putting some info up shortly on the system so the we can try and look at the likely areas.
I'm going back to basics and will be putting some info up shortly on the system so the we can try and look at the likely areas.
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Marc
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Re: c5 fuse box b
I was thinking more of electrical back feeds caused by corroded connections etc, I know mine did all sorts of peculiar things when the front HC played up.
Man is, by nature, a lazy beast, he does not need twice encouraging to do nothing.
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- Posts: 44
- Joined: 20 Nov 2016, 11:18
- Location: ireland
- My Cars: 06 c5 2.0d auto
c5 2.2d auto estate-spare parts
ford transit h3 l3 rwd 115 04
01 xantia 1.9d estate gone
98 xantia 1.9d estate gone
97 xara 1.4 gone
99 saxo 1.1 gone
85 cx2500d gone but not forgotten
and several million mk6 transits
Re: c5 fuse box b
i shall figure out how to jack her up as either of my jacks wont go under it at this point and have a look at the sensors
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Re: c5 fuse box b
If you reverse it up on a few short planks of wood you should be able to see the rear one....and get the jack under the rear sill lift points...that's how I got access to mine, it had rusted the shaft and the head had completely come off !
Alasdair
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Re: c5 fuse box b
Is the F4 fuse in the engine bay box ok?
If its blown it could be one of the ride height sensors shorting out(Don't ask how I know this ).
To get my hydraulic jack under I used the scissor one supplied with the car and axle stands to lift one side and proceeded from there, fairly easy at the rear not so easy at the front.
If its blown it could be one of the ride height sensors shorting out(Don't ask how I know this ).
To get my hydraulic jack under I used the scissor one supplied with the car and axle stands to lift one side and proceeded from there, fairly easy at the rear not so easy at the front.
Last edited by C5 and P2 2-8-2 fan on 03 Mar 2020, 14:37, edited 1 time in total.
- GiveMeABreak
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Re: c5 fuse box b
Parts of the BHI on a C5 MK II
Integrated BHI
The BHI, a monoblock which cannot be taken apart, is composed of the following components:
Key:
So can you confirm that the Suspension switch in the cabin is not in 'Sport' Mode as no height correction takes place when in 'Firm' status.
I would also double check the electric plug sockets to the BHI and make sure you can see the pins - if there is any electrical break then it may affect the operation of the electrovalves internal to the BHI (even though the pump motor is working).
Reference | Designation |
1 | Suspension ECU |
2 | Hydraulic valve block |
6 | Hydraulic pump air intake aperture |
11 | Suspension ECU connector |
12 | Electric motor supply connector |
13 | Electric motor control connector |
14 | Electric motor |
The BHI, a monoblock which cannot be taken apart, is composed of the following components:
- An electric motor to drive the hydraulic pump
- A hydraulic pump with 5 axial pistons
- An anti-pulse accumulator, flow regulator
- 4 electrovalves: 2 per axle, 1 for inlet (raising the vehicle), 1 for outlet (lowering the vehicle)
- An electronic suspension ECU
- 2 anti-sink valves
- 6 hydraulic fluid filters: upstream and downstream of the electrovalves
- 1 overpressure valve
Key:
- Single arrow: Wire connection
- Triple arrow: Multiplexed connection
Reference | Designation |
BSI1 | Built-in systems interface |
A | Door switches. Luggage compartment switch (Estate only) |
0004 | Instrument panel |
1320 | Engine ECU |
7020 | ABS ECU |
CV00 | Steering wheel angle sensor (hydractive 3) integrated in the switch module under the steering wheel |
7702 | Front body height sensor |
7703 | Rear body height sensor |
7710 | Sport mode suspension switch (hydractive 3+) |
7715 | Suspension ECU |
7745 | Vehicle height push button |
N° | Connections | Emitter of the signal | Nature of signal |
1 | Request for change of height | 7745 | All or nothing |
4 | Vehicle height information | 7702. 7703 | Digital |
6 | Hydraulic pump motor functioning status (petrol only) | 7715 | CAN |
8 | Status of the openers | BSI1 | Digital |
11 | Request to light height correction fault. Lighting of height warning lamps | BSI1 | COMFORT CAN |
12 | Request for change of height. Request for change to sport mode | 0004 | COMFORT CAN |
13 | Ignition switched "+". Request for change of height. Principal brake switch | BSI1 | CAN |
14 | Vehicle speed. Longitudinal acceleration. Distance | 7020 | CAN |
15 | Steering wheel speed (vehicle not equipped with ESP) | CV00 | COMFORT CAN |
16 | Steering wheel angle (vehicle not equipped with ESP) | CV00 | Digital |
17 | Engine speed. Starting in progress. Accelerator pedal position | 1320 | CAN |
18 | Request to light the height correction fault lamp. Vehicle height information | 7715 | CAN |
19 | Information on the status of the doors | A | All or nothing |
20 | Lighting of hydractive 3+ activation warning lamp | 0004 | All or nothing |
21 | Request for hydractive 3+ suspension | 7710 | All or nothing |
So can you confirm that the Suspension switch in the cabin is not in 'Sport' Mode as no height correction takes place when in 'Firm' status.
I would also double check the electric plug sockets to the BHI and make sure you can see the pins - if there is any electrical break then it may affect the operation of the electrovalves internal to the BHI (even though the pump motor is working).
Please Don't PM Me For Technical Help
Marc
Marc
- GiveMeABreak
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XM 2.0 Turbo Prestige Emerald Green Pearlescent
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XM 2.0 SX Polar White
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Re: c5 fuse box b
F4? That's for the Headlamp washer system in the PSF1 engine Fusebox (if fitted) supposedly...C5 and P2 2-8-2 fan wrote: ↑03 Mar 2020, 14:27 Is the F4 fuse in the engine bay box ok?
If its blown it could be one of the ride height sensors shorting out(Don't ask how I know this ).
7702 & 7703 (Front & Rear Height Sensors) are supplied directly by the Suspension ECU. So if there is an electrical problem with the suspension ECU on the BHI - then it is entirely possible this will affect the operation of the electrovalves - which is why I've suggested a close look at the circuit / connectors there. The pump itself is supplied independently.
Please Don't PM Me For Technical Help
Marc
Marc