Range rover td6 airride

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oneofakind17

Member
Posts
30
So bought a cheap td6 that surprisingly aint rotten as a pair shocker ino
But does have faults

For and the main one the beloved air suspension inactive fault on dash
Will not air up
However I put it on my mates autel maxisys and scanned for codes and guess what no issues found
So did so more dogging scanner had a few things it could test so tested them
1st test Compressor works dunno if its correct but it pumps air
2nd managed to get into to testing a function that would allow the air to go up however
It - x amount of psi in 3 bags 4th was just flat 0 so pressed test on 4th bag and boom goes up inflated to 60 psi
Now the other 3 the took a while to air up so as test was running on each bag it was counting down from -60psi to 0 then on to + got it up to +60 for all bags but still says no faults or air suspension inactive
Any idea i dear I'm think it dodgy level sensor just want 2nd 3rd and 4th opinion


3rd issue no heating controls so can't seem to use heating no button on heater controls work or anything
I have replaced the hedgehog
 
oneofakind17 said:
So did so more dogging
Click to expand...
Not sure how this will help you but anything is worth a try :)

If the light is on on the raise lower button and stays on when pressed it won't do anything as it is fault mode.
A faulty ride height sensor would show as a fault.
Is the car at normal ride height, on the bump stops, or not level?
If the compressor is weak or worn it will overheat and shut down, but again that would show as a fault. Usually too much energy required to raise car (or something along those lines).
What Year car? do you have the touch screen as that will show some suspension issues?
 
Light on next to air ride is on the - if u set to raise it just flashes
No touchscreen it's a 2002 it's on bumpstops now last time scanned and raised was about 2 months ago
 
Scrap what I said. Blonde moment.

Light on the left is correct as is the light on the button flashing when turned.
Perhaps a more recent scan would help. I would still suspect the compressor first but it could also be a leaky airbag or pretty much anything else. Check the compressor is pumping air out and if so a good squirt around the airbags and air lines to look for leaks.
 
Also check "RAVE All Models" which contains detailed description of the L322 EAS.

Autel MaxiSys needs to be >> V3.10 to cover the L322 EAS.

1744549841293.png
 
oneofakind17 said:
Dunno what version it is but connect yo sys fine I was able to run tests but no code were showing it's a 2024 version with active subscription so it's up to date should be for 4.5k
Click to expand...
In that case, look at the live data for clues on what the suspension is doing. If the pump runs, check the pressure switch to see if it fills the tank. If I remember correctly it should be about 180psi. Then see if the ECU is opening valves correctly.

Your location might help in case there's someone nearby with alternate diagnostics.

I'm assuming that "connect yo sys fine" = "it connects to the EAS ok" ?
 
So scanned tonight on a launch scanner
Could access eas and do some tests but not active the Compressor I've attached some pics of what I could access any ideas
 

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Your compressor is cold at 13 degrees C so you need to see why it's not running.
The last image says there's no increase in pressure when it should be filling up.
Again pointing at the compressor.
 
Coming at it from a slightly different angle, I would expect it to show a compressor fault if it wasn't pumping air rather than the pressure is static when filling. Not had it personally but I know the air tanks can rot out on these (usually at the front where they get battered by the weather and debris). If there's a hole in that it would give static pressure wouldn't it? Didn't spot anything in the pics that tell us what pressure it gets to though.

Having said that, there is a changeover valve of sorts on the compressor that should make it lift the car from the bags and then fill the air tank so it could reasonably be expected to go up even with a hole in the air tank couldn't it? Or would it changeover and let the air back from the bags to the tank with path of least resistance. I'd be out there with the soapy water from this point.
 
Blob said:
Coming at it from a slightly different angle, I would expect it to show a compressor fault if it wasn't pumping air rather than the pressure is static when filling. Not had it personally but I know the air tanks can rot out on these (usually at the front where they get battered by the weather and debris). If there's a hole in that it would give static pressure wouldn't it? Didn't spot anything in the pics that tell us what pressure it gets to though.

Having said that, there is a changeover valve of sorts on the compressor that should make it lift the car from the bags and then fill the air tank so it could reasonably be expected to go up even with a hole in the air tank couldn't it? Or would it changeover and let the air back from the bags to the tank with path of least resistance. I'd be out there with the soapy water from this point.
Click to expand...
Sorry forgot to take a pic live data said tank was at 2.7 psi which is obviously too low and I can open all the valve on the air system they all appear to open/close through the scanner but nothing i tested let the compressor run so I'm thinking about buying a compressor unless my launch scanner can't activate compressor gonna bypass the relay later see if compressor will run if it does ill try opening valves etc to get some pressure in tank and bags
 
Blob said:
Coming at it from a slightly different angle, I would expect it to show a compressor fault if it wasn't pumping air rather than the pressure is static when filling. Not had it personally but I know the air tanks can rot out on these (usually at the front where they get battered by the weather and debris). If there's a hole in that it would give static pressure wouldn't it? Didn't spot anything in the pics that tell us what pressure it gets to though.

Having said that, there is a changeover valve of sorts on the compressor that should make it lift the car from the bags and then fill the air tank so it could reasonably be expected to go up even with a hole in the air tank couldn't it? Or would it changeover and let the air back from the bags to the tank with path of least resistance. I'd be out there with the soapy water from this point.
Click to expand...
I would agree with you if the compressor temp was warm as it would be feeding a leak. I don't believe the car looks at pressure from the pump, only the pressure in the tank./system. So my guess is that the pump is either not running when the ECU thinks it is, or the piston is completely knackered and not pumping any air so not under load.
@oneofakind17 can you hear the compressor running? Scrap that, just saw your reply too late.
 
backinblack said:
I would agree with you if the compressor temp was warm as it would be feeding a leak. I don't believe the car looks at pressure from the pump, only the pressure in the tank./system. So my guess is that the pump is either not running when the ECU thinks it is, or the piston is completely knackered and not pumping any air so not under load.
@oneofakind17 can you hear the compressor running?
Click to expand...
No not when I had it running yesterday compressor was dead but I have inflated bags in the past off a autel scanner was able to run compressor I'm 100% if my launch scanner can just run compressor seriously debating spending 160 quid on a icarsoft scannerv2 off Ebay
 
2.7PSI ain't gonna lift a bicycle let alone one of those :)
Not sure there's too much in it between the iCarSoft and Launch but it will depend on which ones of course. I've got a few different ones.

The compressor should be running, I don't know if I'd bother buying a diagnostic to try and activate it as the car should do that itself and it feels like an expensive plaster for the problem. The lack of errors makes me think that the car doesn't know it's not operating so I'm wondering if it's something as simple as motor brushes that are causing the problem. Now were digging in a bit more, I think I'd simply unplug the motor harness and test the voltage there with the car running and then perhaps try putting power to the motor on the compressor and seeing if it powers up. Elimination steps at this point.
 
If you can run the compressor (either with diagnostics or simply apply 12V to it), and monitor the pressure sensor. If you can get some air in the system, get some soapy water & look for leaks.

Also have a read of these docs to understand how the L322 EAS works.
 

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pwood999 said:
If you can run the compressor (either with diagnostics or simply apply 12V to it), and monitor the pressure sensor. If you can get some air in the system, get some soapy water & look for leaks.

Also have a read of these docs to understand how the L322 EAS works.
Click to expand...
Thanks will do
Wen I'm home from work I will volt test relay and power wires will post results
 
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