beauty2007 Posted January 9, 2015 Posted January 9, 2015 Hi thereI am new to this site. I have a Citroen C4 Picasso 2.0 HDI Exclusive 2007. The rear suspension has failed and I have ordered new parts. The new pump has arrived and has a separate relay for the compressor included with it. Unfortunately they did not give me a diagram as to where the relay is situated and I want to replace it tomorrow. Can anyone help me please? The Haynes Manual does not give any info on the air suspension or the electric handbrake and the Emanual I bought is a lot more helpful, I got a wiring diagram but still do not know the location of this relay.Cheers Paul Quote
paul.h Posted January 9, 2015 Posted January 9, 2015 Welcome to the forum. According to Citroen's procedures the suspension ecu is located behind the front left seat under a flap - so possibly the relay is there, if not you could try in the engine fusebox area. To disconnect the pump piping it says to push down around them with a tool to release them. It also says to pressurise the suspension before lowering the car back on to its 4 wheels and this needs a Lexia diagnostic tool. Then to get the car to its driving height to use the boot switch to lower and raise the suspension to the stops 4 times and then drive the car above 6 mph. Quote
beauty2007 Posted January 9, 2015 Author Posted January 9, 2015 Thank you for your response. I have looked in both of those areas you mention and I cannot find the relay at all. I have looked on other forums and typed the question into Google and other search engines and cannot find any information. I rang a local Citroen dealer and they said it was part of the pump, but the pump I have been supplied with comes complete with a separate relay so it cannot be part of the pump otherwise it would be in there already. Knowing that the suspension is a common problem with these C4's it seems very strange that no-one seems to know or publish anything about this mystery relay!!!Paul Quote
beauty2007 Posted January 10, 2015 Author Posted January 10, 2015 Hi here is an updateToday I fitted the new pump I received from Germany but (surprise) it won't work because there is no power to it. They supplied me with a separate relay, but I still don't know where to fit it? I am getting more and more frustrated. I cannot find any answer. People tell me different things but everywhere they say to look produces no results. Somebody out there must know where this relay is situated. Please HELP.Paul Quote
paul.h Posted January 11, 2015 Posted January 11, 2015 In the handbook, it lists a fuse in the engine fusebox, F14, 30 amp air pump and in the dash fusebox F10, 15 amp height corrector - check if these are in good order and there is power to each of them. It also mentions activation/deactivation using the boot switch on page 145 pneumatic suspension which may be worth a look. Possibly, whilst using the boot switch, you may be able to hear the existing relay clicking so that you can find it. If you look at the forum home page there is a link to our Picasso forum. I would also join this form and ask for the same help (you could link to this topic) since there will be many more Picasso owners using that forum than this one http://www.citroenpicasso.org.uk/picasso/ - but a quick search of this refers you to another forum where the topic of the suspension failure has been extensively covered and leads to the following question:Have you spoken to your Citroen dealer about the air pump failing, since it looks as if Citroen will pay 80% of the cost on cars up to 10 years old for the pump and the suspension air bags if they fail - see this http://c4owners.org/plugins/forum/forum_viewtopic.php?198527.15 Quote
beauty2007 Posted January 11, 2015 Author Posted January 11, 2015 Hi Thank you so much for this information. I have looked at the other topics you sent links for and they are very interesting. I am going to contact Citroen and see if I can get help with the parts I have paid out for. In the meantime could you tell me how I go about doing the link to this topic from the other Picasso forum please.I have discovered today that the new pump does work, I seem to now have a problem with the ECU. I have removed the ECU and tested the circuit. I have power coming to the main plug and I then powered the relevant two pins which go direct to the pump and away it went so I know that there is nothing wrong with the loom and the brand new pump I fitted works. This means that the ECU is at fault. I would advise people to be very careful and make sure that the car is properly checked and do not assume that the pump has failed straight away because it may not be the case. Unless the checks that I have done are carried out, then you could pay out for a new pump which is not necessary. By the way, I still do not know where the relay is!!. Quote
paul.h Posted January 12, 2015 Posted January 12, 2015 To copy a link in to a post, I have found the easiest way is to use the mouse right button to copy the address of the page at the top of internet explorer and then paste it (again with a mouse right click) in the post. Quote
Porsche430 Posted January 20, 2015 Posted January 20, 2015 I'm pretty certain Citroen were putting faults with these right after BBC1's Watchdog gave they a good stone kicking pretty much free of charge. Quote
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