Hi, new to forum after acquiring 2002 TD5 Auto.
Just asking advice-
Car sitting up okay, not low by any means, but rear O/S lower than N/S (or is it the N/S is simply higher?). It still has pleanty clearance, just standing behind car the height difference is just noticeable.
No Fault lights whatsoever.
When I do press the suspension height button, nothing much SEEMS to happen except the amber light on dash stays lit while button is pressed, that is all. When you let go, light goes out. No alarms, no height difference etc, height of car just seems to stay the same.
Is this a problem, other than looking slightly tilted? If so any body else have similar ideas? If it were (combination) of air bag, height sensor and or compressor would some fault light not be present somewhere?
Thanks (very much) in advance.
Would maybe even consider coil springs if it only brings on light!
A mis-match in rear airbag heights, is most likely to be a faulty height sensor on one side... Could be another cause, but this is the most likely. If any part of the air suspension system fails, there are no warnings on the dash - it's just obvious from looking at the car, that it's not working - especially if a height sensor goes... I've had it so that one corner is fully up and the other fully down! (Looked like a clown car driving it to the garage!). The only warning light you'll get on the dash is from the ACE system if you have it fitted (yellow car wobbling from side to side icon), which warns when the fluid reservoir is low and you're ****ing out ACE fluid from somewhere!
If the system drops over a period of 24-48 hours, it could be a small air leak in one of the airbags, as they tend to crack and leak where they fold at the "roll over" point as they move up and down over the years.
Any decent Landy specialist will have it diagnosed in no time at all. Sensor's are reasonably priced - even for new genuine. Airbags less so for the gen if you buy new - but you can get excellent used OEM (Conti) bags from any breaker for about 25-30 notes.... I'd avoid the Dunlop non-OEM myself, although a lot of people will say that they're just fine.
When you hold down the offroad height button on the dash as you describe, the dash should ping three times and the light flash as air is pumped into the bags and the back end rises for more clearance. If you sit nice and still in the driver's seat and keep your eyes fixed on the wing mirror, you should see it rise up slowly - takes about 70-80 secs to fully rise. Yellow light on dash will flash until it finishes it's run and then the light will stay solid when it's reached full height. Yellow light will stay on until it returns to normal height, and as already stated, will only run the process at all if all five doors and bonnet are firmly closed.
If yours is going straight off again and doing nothing straightaway - not even trying to rise or stay lit, again tends to point to a height sensor stopping the process from even starting.
Am presuming that the compressor does actually work? And the truck's not just sitting flat (ish) with a buggered compressor that doesn't work at all, but you've been lucky that the system is still air-tight and not losing air?! Seems unlikely, but not impossible. You don't want it to be the compressor as a new Wabco unit is big bucks from a MD, and even fairly big bucks from a breaker used (with no guarantee of likely residual life either!)
If the compressor isn't doing anything - it might be something else stopping it from working. Could be a relay/fuse type issue (if you're lucky), or worse something in the ECU not sending the signal to start/stop it when required.
Time for a good relationship with a really good local independent specialist - they can diagnose this far quicker than any DIY'er, as they'll have seen it all before - many, many times. Can recommend someone brilliant if you're in Kent!
