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beanmasteruk

Member
2002 L322. air suspension pump was getting lazy, so used quality repir kit. reassembled unit. start car up. Nothing. Ride height indicator shows normal ride height. HOWEVER. Rear has sunk completely. Turn dial to up position and nothing happens, although light flashes. turn to down position and compressor cuts in, but nothing happens. press acess button on door and compressor cuts in, but nothing happens, doesn't move. Pulled air pipe off and its compressing air fine, just not raising car. ran diagnostic with latest LAUNCH tool, and shows no faults in air suspension, in fact, no faults anywhere in the car!! so, I have a range rover stuck on its haunches at the rear, a compressor that works, but doesn't move the vehicle up or down! Cuts in on down position but not up. Any ideas, anyone??
 
If the compressor is good the air is going somewhere you need to find out where.
 
Empty air tank maybe...allow the vehicle to run with a door open for 10 minutes to recharge the system

As Datatek suggests, search for a thread by rs2000custom - he has a good thread about problems with the valve block!
 
no leaks, its been fine until I changed the pump ring. I've checked all connections etc, had it running with door open/closed all afternoon,so much so in fact, the thermal cut out activated!
 
beanmasteruk said:
no leaks, its been fine until I changed the pump ring. I've checked all connections etc, had it running with door open/closed all afternoon,so much so in fact, the thermal cut out activated!
Click to expand...
The thermal cut out should never operate if the compressor is making air and there are no leaks.
Either the compressor is not making enough pressure or it's feeding a leak.
 
Datatek said:
The thermal cut out should never operate if the compressor is making air and there are no leaks.
Either the compressor is not making enough pressure or it's feeding a leak.
Click to expand...

+1 tee in a pressure gauge to the pump outlet.

The Valve Block is plastic and has been known to crack internally....
 
Update.

Been plugged into land rover diagnostic today. Pump fine. Ride height sensors fine. Dash switch fine. Pressure fine. Holding tank fine. Valve block fine. These ELECTRONIC items all report as ok, with signals and readings. However, they can't report mechanical failings.......everything seems (electronically) to be working. All door shuts checked too. Vehicle simply refuses to rise. The land rover diagnostic normally allows you to pump each corner, but not on mine! No leaks on any bags or airlines. Compressor kicks in automatically AND when being prompted to. STILL it will not rise....

My theory is valve block. Although diagnostics support thr theory that it works electronically, that doesn't mean to say that mechanically it doesn't. If it DID work, then remote access SHOULD allow diagnostics to inflate any chosen corner. I'm thinking this; Pump builds up air to pressure in storage tank. Tank then distributes air, via valve block, to all four corners. Valve block inoperative hence failure to rise......

Anyone concur?
 
Would concur....aslong as the Pump pressure is filling the tank (via valve block) and so there is pressure in the tank, then the only thing left would be the valve block not opening the valves....most unusual that all 4 corner solenoid valves have failed....unless it is the inlet/exhaust valve solenoid that has failed which is more likely.

What happens is, the ECU commands movement and opens the corner solenoids AND the inlet solenoid this inlet solenoid opens the system to tank pressure and allows the car to rise....

What could be happening to yours (as NONE of the corners rise) is the ECU opens the Corner Solenoids and commands the Inlet Solenoid to open - but it is either stuck or fails to respond hence no air gets to the corners and subsequently no rise!
 
Thanks saint.v8. Using the proper diagnostics have made the difference in diagnosing, although it IS mechanical failure I'm sure. Thanks for your height too. Now where is this inlet solenoid you speak of, I'm afraid I don't know
 
All solenoids are in the valve block, bar the Exhaust valves - these are in with the compressor I believe....

Attached is the pneumatic diagram of the system....inlet valve is item no. 5

I trust you have the RAVE manuals as this will contain the system operation and description and also the workshop repair manuals.
 

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Do diagnostics report tank pressure on the L322? I think not. Could still be the compressor not making pressure as that was the last thing touched before the problem arose.
 
beanmasteruk said:
Simply see if it is man enough to fill the holding tank in the amount of time dictated by the ECU
Click to expand...

Oh I see, you want to swap out the compressor...when you said comp I thought you meant computer!

Mine isn't the best to test the compressor on as I run LPG and the tank is where the spare wheel would be, and the Compressor has been moved so requires a bit more dismantling of the car to get to it as it now sits in a recess under the rear seat floor and is a fiddle to get at!

Take your compressor out and plug 12V into it and see if you can stop the air flow with your thumb, you should not be able to block the air and it should lift your thumb of the pipe on a cushion of air....
 
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