Vehicle & Technical > Range Rover
Air suspension pump testing.
DAVE39V8:
--- Quote from: "Range Rover Blues" ---OK I had a quick look at the system schematic and there is a pressure relief valve so you can't over-inflate the system.
If the system is totally flat the pump needs to run for at least a minue before there is enough pressure to lift the back end, remember the back end will lift first.
IIRFC the pressure switch is located on the tank but I'll go check that.
One way to check for pressure in the system would be if you can open the drain valve in the bottom of the tank, it needs a very big allen key though. Just crac it open, the bolt has a channl cut into it to relief pressure and blow out water without blowing the plug out.
--- End quote ---
I've just had quick look..There is no power getting to the compressor or the pressure switch(checked with bulb technique etc).
I have checked fusebox and all fine.
Haven't found an allen key big enough yet for the tank..
I tried pumping up susp just connecting compressor to battery and no height gained.
But when using the inflation kit(which is fitted on each corner seperately)the bags fill up individually as inflated. :?:
Patience is wearing thin :evil: :evil:
Range Rover Blues:
--- Quote from: "Jonny Boaterboy" ---I'm not sure about this but I think it takes 6 min to fill an empty tank as Mr Blues said you can't over inflate so leave it running for a while with the door open or inhibit switch on (under drivers seat) then close the door and see if it works. If you send me a PM with your address I have a very helpful few pages I found on a web sight which I can drop in the post to you, it tells you in detail how the air works and common problems and fixes
Let us know
Jonny
--- End quote ---
Wouldn't mind a copy myself.
Range Rover Blues:
Ok let me get this straight.
1]You can make the pump work by connecting to the battery but no power comes from the ECU to the pump.
2]Even after you have run the pump to fill the air reservoir the suspension will not go up.
3]You can manually inflate each corner in turn so you are happy there are no leaks between the valve block and the air springs (at least no fast leaks).
1] if the ECU thinks the tank is full it will not run the pump, so I still think it could be the pressure switch. If you can get hold of the wiring diagram then you could test the output from the switch with a multimeter. If you can find the switch you could manually over-ride it with say a blade type fuse or paper clip.
2]How long did you run the pump for? are you sure the pump is building up pressure and not leaking internally?
Do you hear the valves open and close (ticking) as it tries to inflate the corners? can you hear it self-leveling if you inflate each corner manually?
This last point is important, if the system is not self-levelling, say after you turn off the ignition or close the last door then something may be wrong. So what does your car do if you inflate the suspension manually, this may be a clue.
BTW, the inhibit switch just works like a door open switch, it suspends the EAS below 50mph. Check that yours is not inhibited, the garage may have done this at some point.
If you fancy a drive up then I will put it only Rovacom for you and try to get to the bottom of it.
Jonny Boaterboy:
Mr blues, I have just don a copy for Dave I will try and get one do for you next week (read you note after doing Dave's copy!)
send us a PM with your address
Jonny
DAVE39V8:
--- Quote from: "Range Rover Blues" ---Ok let me get this straight.
1]You can make the pump work by connecting to the battery but no power comes from the ECU to the pump.
2]Even after you have run the pump to fill the air reservoir the suspension will not go up.
3]You can manually inflate each corner in turn so you are happy there are no leaks between the valve block and the air springs (at least no fast leaks).
1] if the ECU thinks the tank is full it will not run the pump, so I still think it could be the pressure switch. If you can get hold of the wiring diagram then you could test the output from the switch with a multimeter. If you can find the switch you could manually over-ride it with say a blade type fuse or paper clip.
2]How long did you run the pump for? are you sure the pump is building up pressure and not leaking internally?
Do you hear the valves open and close (ticking) as it tries to inflate the corners? can you hear it self-leveling if you inflate each corner manually?
This last point is important, if the system is not self-levelling, say after you turn off the ignition or close the last door then something may be wrong. So what does your car do if you inflate the suspension manually, this may be a clue.
BTW, the inhibit switch just works like a door open switch, it suspends the EAS below 50mph. Check that yours is not inhibited, the garage may have done this at some point.
If you fancy a drive up then I will put it only Rovacom for you and try to get to the bottom of it.
--- End quote ---
Here we go....
1)Correct!
2)Correct!
3)There is a leak but a slow one.
I will try the paper clip method in morning.
I ran the pump for approx 1.5mins so might not be long enough.
I haven't driven it with the inhibit switch on while pumped up manually(because I know it will lower itself eventually on bump stops :?: ) but it drives ok.
When I picked the car up from getting the ECU faults cleared they said it were all pumped up(manually) and ready to drive home but when I got to car it were on bump stops(from it self levelling over the few hours stationary).
They had to pump it up manually so I could drive home(with inhibit switch off).
So I would say the self level/opening door aspect were ok.
I will have another go in morning and let you know how it goes.
If it doesn't work then expect me in Sheffield :lol:
I hope all this makes sense only trying to write this and stay awake to do a nightshift is abit tiring(especially when during the day i'm under the car and coming up against a brick wall) :)
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