Flinders Trip - minor air susp issue / but LLAMS very useful

[CSBrisie]

Took the D4 (now with 20K on the clock) to Argadells Station in the Southern Flinders. Towed Kimberley Kamper with ease as you'd expect. A very pleasant week bush camping with some "mild" 4wd'ing on the station tracks around Mt Arden. Had the 19inch MTR's performing as well as they did in the VHC over Xmas last year. Only issue was we had the air suspension go into limp mode ("vehicle will raise when system cools") during a particularly rough section near South Gorge. We did not experience this in our holiday in the VHC last year despite some long periods with Off Road height combined with LLAMS at +30 and even +50mm briefly.

We banged our way to the bottom of the track in access mode and turned off the car for 10 mins and tried the three open/close door lock reset etc to no avail. As everyone in our group was waiting for us I tried using LLAMS to raise the suspension. It worked perfectly so we slowly headed back along the track to camp. After about another 15 minutes on the track the system obviously cooled and the vehicle raised to off road height (which ofcourse with LLAMS in +50mm mode already meant super extended). We turned off LLAMS and it was business as usual at Off Road height. Cause?? Not sure. I've checked whether the compressor was covered in mud (we have the GOE protection plate so mud does get in there) but it seemed OK. I admit I had been using Off Road Height combined with LLAMS at +30 for a while around Mt Arden - so I wonder if we had been "over doing it" (Graeme, thoughts / comments????)

Cheers

Chris

[Graeme]

Something must be missing from the chain of events, as Llams can't cause the compressor to run and lift the vehicle when the compressor's temperature sensors indicate the compressor is too hot to continue operating. An overheated compressor wont trigger a lowering to access height (not that I know of anyway), only pausing the current raise and the dumping of the pressure from the airlines to facilitate the restarting of the compressor when it is cool enough to continue.

What caused the vehicle to go down to access height? If it was a brake system fault then Llams will still work, albeit from a lower base-line, as long as the compressor wasn't waiting to cool.

Anyway, it was good that Llams helped.

[gghaggis]

HI Chris,

I agree with Graeme - seems odd. If the compressor was offline, how did the LLAMS module lift the vehicle? At that stage (when you used the LLAMS), it would seem that the compressor must have cooled down. Something else must have triggered the drop to access that then corrected itself later. Can you check the diagnostic codes?

Cheers,

Gordon