Hi. Yesterday my 2004 C5 was working fine - now, there is no activity from the pumps and the internal switch has no effect, up or down. I've checked both fuses referred to in the manual as being connected to the suspension. Both ok. I'm assuming it is an electrical failure, possibly a relay. The car is now sitting on the driveway getting lower all the time. The LDS reservoir is fine.
Does anyone have any experience of this? (Bizarrely, yesterday a young lad asked for my advice on this very problem!! He'd been given a 'Y' reg C5 which would not rise from the low setting, irrespective of the switch position - now mine has caught the same disease).
I hope someone can help.
C5 - Suspension not working - relay fault?
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C5 - Suspension not working - relay fault?
John
'59 C5 2.2 173 VTX+ saloon, Jaguar 3.8 MkII 1961
RIP - '07 C5 2.2 173 VTX+ Estate
'59 C5 2.2 173 VTX+ saloon, Jaguar 3.8 MkII 1961
RIP - '07 C5 2.2 173 VTX+ Estate
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Ex BX 1.9 TRS - x 1
Thanks, Steve - checking for voltage would be a good start. Do you know where the pump is located? It also occurs to me that the ECU may be on strike, so I'll disconnect the battery tomorrow morning and see if it resets.
Could this be a height corrector issue? If these are electronic, it could be that the ECU needs to see a signal from both before telling the pump what to do.
Could this be a height corrector issue? If these are electronic, it could be that the ECU needs to see a signal from both before telling the pump what to do.
John
'59 C5 2.2 173 VTX+ saloon, Jaguar 3.8 MkII 1961
RIP - '07 C5 2.2 173 VTX+ Estate
'59 C5 2.2 173 VTX+ saloon, Jaguar 3.8 MkII 1961
RIP - '07 C5 2.2 173 VTX+ Estate
- myglaren
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Ooops.
Previously:
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It is on the left of the engine bay below the LDS reservoir. I'll send a photo in the morning, bit dark here now.
I believe that viorelovidiu had a similar problem but just with the rear sensor failing.
Edit to add:
You can just see the pump under the reservoir in this photo, to the left of the power steering pump pulley, above the alternator.
Click the image a few times to get maximum size and resolution.
It is not unthinkable but rather unlikely that both have failed at once.Could this be a height corrector issue? If these are electronic, it could be that the ECU needs to see a signal from both before telling the pump what to do.
I believe that viorelovidiu had a similar problem but just with the rear sensor failing.
Edit to add:
You can just see the pump under the reservoir in this photo, to the left of the power steering pump pulley, above the alternator.
Click the image a few times to get maximum size and resolution.
Last edited by myglaren on 03 Apr 2010, 20:20, edited 1 time in total.
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If the pump is not running it's not getting elecky or it's broke.
Have you checked the MAXI fuses on the engine relay unit in the engine compartment?
Apropos suspension ECU that is in the pump.
cachaciero
Have you checked the MAXI fuses on the engine relay unit in the engine compartment?
Apropos suspension ECU that is in the pump.
cachaciero
2006 Toyota Prius T Spirit
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Thanks, guys. I guess that's my Sunday sorted, then. If the pump is dead, I shall be most vexed - a pump and ECU sold on ebay a month ago for £26! The young chap I referred to in my first post said that the garage that gave him the car (a trade-in) had told the owner that "it'd be £1000 to replace the pump". I think they just wanted to sell him another car...
John
'59 C5 2.2 173 VTX+ saloon, Jaguar 3.8 MkII 1961
RIP - '07 C5 2.2 173 VTX+ Estate
'59 C5 2.2 173 VTX+ saloon, Jaguar 3.8 MkII 1961
RIP - '07 C5 2.2 173 VTX+ Estate
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Ex 2007 C5 2.2 Estate
Ex 2003 C5 2.2 Estate
Ex Xantia 2.1 TD Exclusive
Ex BX 1.7 DTR
Ex BX 1.9 TRS - x 1
A temporary fix has been effected. There was no voltage on the pump primary feed, but there was excitation voltage. I bridged directly from the battery, started up and the car rose to the correct height, with the manual raise/lower working fine. Everything else works, so it would seem that the main power to the pump has been interrupted somewhere. Back to thinking about relays again.
Thanks for your input.
Thanks for your input.
John
'59 C5 2.2 173 VTX+ saloon, Jaguar 3.8 MkII 1961
RIP - '07 C5 2.2 173 VTX+ Estate
'59 C5 2.2 173 VTX+ saloon, Jaguar 3.8 MkII 1961
RIP - '07 C5 2.2 173 VTX+ Estate
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I repeat have you checked the 30 amp maxi fuse in the engine relay unit under the bonnet? This is the principal feed direct to the pump.
cachaciero
cachaciero
2006 Toyota Prius T Spirit
2001 2.2 C5 Exclusive SE
1996 XM 2.1 TD Auto VSX
1995 XM 2.1 TD Auto SX died @ 140K
1987 CX 2.5 Gti Turbo II dead
1984 Ford Scorpio
1981 CX 2.4 Pallas Auto
Renault 21
1220 GS Club
Rover P6 2000TC
2001 2.2 C5 Exclusive SE
1996 XM 2.1 TD Auto VSX
1995 XM 2.1 TD Auto SX died @ 140K
1987 CX 2.5 Gti Turbo II dead
1984 Ford Scorpio
1981 CX 2.4 Pallas Auto
Renault 21
1220 GS Club
Rover P6 2000TC
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I've had a look at my french manual for the C5.
The supply to the suspension motor comes directly from fuse MF8 which is 40 amp (hence the reference to MF I suppose... ). This fuse lives with 7 other large fuses beneath the engine compartment fuse module. This is next to the ECU housing.
Please note, there are 8 very large fuses beneath the engine compartment fuse module. You will only be able to see them if you remove the fuse module from its position. Lift it right up and MF8 is underneath. There is a small fuse 8 on the top. This is not the one you need to check.
The supply comes from the battery to fuse MF8 and then to the pump motor. If the supply is missing then the most likely thing is that this fuse has blown. Otherwise there could be an open circuit. I'd check the fuse first.
Edit Cachaciero just beat me to it..
The supply to the suspension motor comes directly from fuse MF8 which is 40 amp (hence the reference to MF I suppose... ). This fuse lives with 7 other large fuses beneath the engine compartment fuse module. This is next to the ECU housing.
Please note, there are 8 very large fuses beneath the engine compartment fuse module. You will only be able to see them if you remove the fuse module from its position. Lift it right up and MF8 is underneath. There is a small fuse 8 on the top. This is not the one you need to check.
The supply comes from the battery to fuse MF8 and then to the pump motor. If the supply is missing then the most likely thing is that this fuse has blown. Otherwise there could be an open circuit. I'd check the fuse first.
Edit Cachaciero just beat me to it..
Cheers, Kev
02 plate C5 2.2 Hdi Exclusive SE (now 170k miles 03/21).
Used to have:- Xantia 1.9 TurboD SX. 1996 Blue & 1998 Silver Activa. + 1992 BX TZD Turbo.
02 plate C5 2.2 Hdi Exclusive SE (now 170k miles 03/21).
Used to have:- Xantia 1.9 TurboD SX. 1996 Blue & 1998 Silver Activa. + 1992 BX TZD Turbo.
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- (Donor 2022)
- Posts: 154
- Joined: 18 Feb 2004, 18:02
- Location: Milford, Godalming
- My Cars: C5 2.2 VTR + Nav 173
Mazda 6 2.2 Sports Nav Estate
Jaguar 3.8 MkII 1961
Ex 2007 C5 2.2 Estate
Ex 2003 C5 2.2 Estate
Ex Xantia 2.1 TD Exclusive
Ex BX 1.7 DTR
Ex BX 1.9 TRS - x 1
Kev/Cachaciero
Ta for the info. I checked the fuses yesterday and could find none that were blown. Mind you, Kev's note about fuses under the under-bonnet fuse box is a bit of a revelation. I was working from the Owner's Handbook which lists the fuses with each fuse's function - it doesn't mention any 40 amp jobbies to do with suspension! In fact, there is only one 40 amp fuse listed and that is for the air blower.
I'll dig around tomorrow. Of course, a blown fuse always prompts the question - why?
Ta for the info. I checked the fuses yesterday and could find none that were blown. Mind you, Kev's note about fuses under the under-bonnet fuse box is a bit of a revelation. I was working from the Owner's Handbook which lists the fuses with each fuse's function - it doesn't mention any 40 amp jobbies to do with suspension! In fact, there is only one 40 amp fuse listed and that is for the air blower.
I'll dig around tomorrow. Of course, a blown fuse always prompts the question - why?
John
'59 C5 2.2 173 VTX+ saloon, Jaguar 3.8 MkII 1961
RIP - '07 C5 2.2 173 VTX+ Estate
'59 C5 2.2 173 VTX+ saloon, Jaguar 3.8 MkII 1961
RIP - '07 C5 2.2 173 VTX+ Estate
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The reason the handbook doesn't mention these fuses is that they are supposed to be a dealer-only replaeable item.
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