RS2000CUSTOM
Active Member
(2002 - 05) - ..... regardless of all you are told or read jump straight in and replace the compressor in the boot area.
I am lucky enough to be able to spend my own time and use of my Snap-On Solus Ultra to look after my TD6
On Monday I get the Air Suspension Inactive error on dash
I had only 1 code - pressure static when filling
Cleared easily drove all ok
Tuesday morning dash message again - now a different code - Pressure drops when filling
Error again cleared but within a mile dash message again - now error codes keep swapping between static and drops after each reset !
Prior to me buying my motor in Sept it had a new compressor fitted so in boot unit is only 3 months old (doesnt mean it not faulty though of course)
No leaks ANYWHERE on pipes, bags etc etc
Rear suspension is constantly trying to settle itself - front stays stable
Whilst monitoring live data the compressor kicks in and out but no or little increase in reservoir pressure - compressor eventually overheats and cuts out - and so on
Ride heights are all good except slight fluctuation of rear
Here begin the diagnosis
All height sensors I removed each link bolt and watched voltage reading - all good with no erratic data just smooth rise and fall of readings
Checked again still no leaks anywhere
Disconnect compressor air pipe to blow off valve - loads of air expelled from system (not compressor) and rear suspension went to bump stops on N/S/R and then shortly followed by O/S/R - front heights remained stable
With the use of a controllable air line I introduced air into the blow off valve T piece and I can (key off doors open or closed) raise and lower the rear suspension like Snoop Doggy Dog on a gangster rap video !
My conclusion is a one way valve somewhere wihtin the system is letting compressor air go straight to the rear air bags
Well I have found it !!!!
On the O/S under sill is the air tank receiver and in front of receiver is a solenoid assy
Having stripped the rear air bag solenoid within the unit I find that in the end of the brass plunger is a (wait for it ) a 1 way valve !
So I set about cleaning etc but sadly the end of the plunger is peened over and I am unable to repair the valve - so sadly its game over new solenoid block needed !
A shade under £400 - dealer part only but will keep looking see if I can get a better price
Having stripped the solenoid I can now see why the Static error occurs - it is because the compressor air is going straight to the rear air bag and the receiver pressure remains "Static" or the receiver is passing air straight to the airbag so the Pressure reading now drops
Hope this may help some of you to not dive straight in with a new compressor
I am lucky enough to be able to spend my own time and use of my Snap-On Solus Ultra to look after my TD6
On Monday I get the Air Suspension Inactive error on dash
I had only 1 code - pressure static when filling
Cleared easily drove all ok
Tuesday morning dash message again - now a different code - Pressure drops when filling
Error again cleared but within a mile dash message again - now error codes keep swapping between static and drops after each reset !
Prior to me buying my motor in Sept it had a new compressor fitted so in boot unit is only 3 months old (doesnt mean it not faulty though of course)
No leaks ANYWHERE on pipes, bags etc etc
Rear suspension is constantly trying to settle itself - front stays stable
Whilst monitoring live data the compressor kicks in and out but no or little increase in reservoir pressure - compressor eventually overheats and cuts out - and so on
Ride heights are all good except slight fluctuation of rear
Here begin the diagnosis
All height sensors I removed each link bolt and watched voltage reading - all good with no erratic data just smooth rise and fall of readings
Checked again still no leaks anywhere
Disconnect compressor air pipe to blow off valve - loads of air expelled from system (not compressor) and rear suspension went to bump stops on N/S/R and then shortly followed by O/S/R - front heights remained stable
With the use of a controllable air line I introduced air into the blow off valve T piece and I can (key off doors open or closed) raise and lower the rear suspension like Snoop Doggy Dog on a gangster rap video !
My conclusion is a one way valve somewhere wihtin the system is letting compressor air go straight to the rear air bags
Well I have found it !!!!
On the O/S under sill is the air tank receiver and in front of receiver is a solenoid assy
Having stripped the rear air bag solenoid within the unit I find that in the end of the brass plunger is a (wait for it ) a 1 way valve !
So I set about cleaning etc but sadly the end of the plunger is peened over and I am unable to repair the valve - so sadly its game over new solenoid block needed !
A shade under £400 - dealer part only but will keep looking see if I can get a better price
Having stripped the solenoid I can now see why the Static error occurs - it is because the compressor air is going straight to the rear air bag and the receiver pressure remains "Static" or the receiver is passing air straight to the airbag so the Pressure reading now drops
Hope this may help some of you to not dive straight in with a new compressor
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