I removed a heavy load from the boot of the C5 this morning, which had been standing all night, and heard the suspension pump running for about two minutes. Was about to pull the fuse to ensure that the motor didn't overheat, when the pump stopped and I noticed that the front was on maximum height, but the rear was on normal.
Did a Citrobics session, and it became clear that the front suspension would go to max or min, but nowhere in between. Out with the axle stands to examine the height sensor, which looked fine, and seemed free (the dogbone connector, similar to earlier height correctors, was still in place too).
With thoughts turning to the expense of a Lexia session, I thought it might be worth doing a system reset first. Disconnect battery, discharge across leads, reconnect, wait while the system boots (trying not to panic about the 'immobiliser fault' message in the meantime
All OK, suspension behaves normally at all levels!
Thought this might be worth posting in case anyone else has the same issue
C5 suspension height glitch
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It obviously got a bit confused for some reason!
Did you try and drive the car to see if that would have sorted it out?
Did you try and drive the car to see if that would have sorted it out?
Chris
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Hmm in some ways the C5 is a simplified , if more computer based, car as far as its suspension goes. Generally C5s suspension is good and reliable.
Still, you have not had to actually spend any money or do much, apart from disconnect the battery. Thats not bad!
Still, you have not had to actually spend any money or do much, apart from disconnect the battery. Thats not bad!
Chris
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Pity they did'nt / haven't and now probably won't do the development to the next logical phase. i.e position feedback on each strut together with a raise and lower valve for each strut, that with the right software could have made anti roll bars redundant and turned Activa owners green with envyCitroenmad wrote:Hmm in some ways the C5 is a simplified , if more computer based, car as far as its suspension goes. Generally C5s suspension is good and reliable.
Still, you have not had to actually spend any money or do much, apart from disconnect the battery. Thats not bad!
cachaciero
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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
Ah well...it's never as simple as it seems, is it?
Suspension decided to misbehave again today, and a reset was no help this time.
Removed, cleaned and lubricated the height sensor, including a squirt of switch cleaner on the connector. I also drilled a small hole in the body of the sensor, injected a drop of cleaner, and thoroughly exercised the sensor. Sealed the hole by melting some soft plastic into it, then reassembled.
All seems fine again now, but time will tell...
I suspected that there was a dirty / worn / intermittent spot on the sensor (like a 'crackly' volume control), which initially confused the ECU, and more recently gave the permanent fault. The only thing is that I would have expected it to be OK on intermediate height in that case, as a different spot on the track would then be in use; the fault was more like a poor connection to one end of the pot, perhaps on the connector. We'll see!
Suspension decided to misbehave again today, and a reset was no help this time.
Removed, cleaned and lubricated the height sensor, including a squirt of switch cleaner on the connector. I also drilled a small hole in the body of the sensor, injected a drop of cleaner, and thoroughly exercised the sensor. Sealed the hole by melting some soft plastic into it, then reassembled.
All seems fine again now, but time will tell...
I suspected that there was a dirty / worn / intermittent spot on the sensor (like a 'crackly' volume control), which initially confused the ECU, and more recently gave the permanent fault. The only thing is that I would have expected it to be OK on intermediate height in that case, as a different spot on the track would then be in use; the fault was more like a poor connection to one end of the pot, perhaps on the connector. We'll see!