Another suspension request L320

Hi All

I am back looking for some help with my 05 L320 again.

I have read a number of threads in relation to the suspension but I would like some opinions before I go down the route of a new compressor and that turns out not to be the fault.

I have the orange suspension light on all the time and it has been on a while.

I have put a diagnostic tool on and checked the following modules for faults and this is what came up.

ALL TERRAIN MODULE
UO471 invalid data received from Ride Level Control Module.

RIDE LEVEL CONTROL MODULE
C1A26 Temp sensor Circuit -This re-appeared straight after a code clear
C1A13 Pressure does not decrease when venting gallery -This re-appeared after pressing the suspension lift button when codes where cleared
C1A36 Exhaust valve- this re-appeared after pressing the suspension lift button when codes where cleared

I would appreciate any help to let me decide what avenue to take with this.

Thanks again

Gary

That looks very much like a wiring / connection issue - check the multipole connector behind the NSF wheelarch liner, there's two at the bottom of the 'A' pillar (they were usually cut out and the wiring joined with heatshrink covered inline crimp connectors when they suffered water ingress - LR sanctioned repair method). If OK (which I doubt), then check the 5A fuses in the Battery Junction Box that are marked with the EAS icon, if they're OK, check the multipole connector at the compressor assembly for correct voltages and ground - if they are all OK, then replace the compressor assembly.

Thanks for the reply.
I'll do that tomorrow and post the results.

I did do a data test and it gave the following result

All four corners have 5v feed with zero amp current.

The height sensor voltages are as follows
FL= 1.85
FR=1.90
RL=1.60
RR= 1.33

Thanks again

The height sensors go through a different pair of connectors in the NSR wheelarch, the voltages look a bit off but bear in mind the compressor is in 'lockout' and no doubt you weren't parked on a 'calibrated level surface', so I wouldn't put much store in those voltages TBH

Graculus said:

The height sensors go through a different pair of connectors in the NSR wheelarch, the voltages look a bit off but bear in mind the compressor is in 'lockout' and no doubt you weren't parked on a 'calibrated level surface', so I wouldn't put much store in those voltages TBH

Click to expand...

Thanks for clearing that up.

I'll check the connectors tomorrow

Replace the compressor a new 1 is less than £150 off the bay.