Suspension + DSC + handbrake + brake warning lights

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Originally Posted by Graeme

...Did the suspension rise after a restart or did it stay permanently on the stops until the 2 faults were fixed?

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The suspension stayed down after a restart and also after a spell with the battery disconnected. I can't say it was honest to god on the stops, but it was lower than access height (at access height I can still just get my toes in between the wheel arch and tyre, whereas I couldn't with the fault). Moreover every little bump in the road came right through, much more so than when driving at access height.

The dealer diagnosed only one fault, the busted ABS sensor (it was physically broken in two). I'm hoping to hear tomorrow that it's all fixed.

Ben

Hi guys

I had a low washer fluid level sign come up around the same time as these fault lights and have eventually refilled the washer bottle back up. I then watched it leak over the garage floor. Like most things on the Disco its tricky to get at. I removed part of the inner wheel arch and the left fog light and could feel lots of fluid, but no obvious cracks. Regardless, I am now wondering if the location of this is incidental to the fault lights that appear in the original post on this thread?
Or could some water be leaking into something in the front left wheel arch near the washer bottle and cause all these fault lights and suspension drop?

Thoughts appreciated
Cheers
Karl

I just had exactly the same set of circumstances happen to me on a trip from Sydney to Brisbane, except I had Llams set to -20, I went around a corner a little too fast, enough to activate the DSC just a touch,and then a Couple of minutes later going around another corner all the warning lights came on and suspension lowered and reduced gears etc.

Luckily for me though I just pulled over, shut down the car locked the doors, waited a minute and opened and restarted and everything reset to normal. Whew. Needless to say I don't think I will be using the Llams -20 on the highway again.

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Originally Posted by AnD3rew

..and suspension lowered and reduced gears etc.

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Reduced gears shows that this was an ABS fault not a suspension system fault so wasn't caused by using Llams at -20mm. Fault codes would likely indicate a particular wheel ABS sensor fault.

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Originally Posted by Graeme

Reduced gears shows that this was an ABS fault not a suspension system fault so wasn't caused by using Llams at -20mm. Fault codes would likely indicate a particular wheel ABS sensor fault.

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I don't think it is a Llams fault per se, but my theory is that with a heavily loaded car with the suspension lowered and then going through a high speed corner with a few unsettling bumps it got all kinds of strange wheel movements and sensor indications which caused a fault. I have never had it before, and it didn't repeat for another 6 hours of driving once I went back to normal suspension settings.

May be nothing at all to do with the Llams setting but the car was at maximum wieghts with maximum load on the roof racks etc and maybe the Llams was just one straw too far.

As that height is the 160 kph+ height I doubt it had anything to do with the fault(s).

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Originally Posted by Graeme

As that height is the 160 kph+ height I doubt it had anything to do with the fault(s).

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True, but I suspect that that was designed for 160 kph on a German autobahn at, not 100kph on the New England Highway at maximum weights, but we will see if it appears again. I cold be wrong, it may be a dodgy ABS sensor.

If we assume it has nothing to do with the -20, Does this ever just happen as a one off, or do I need to assume there is something dodgy going on?

I've not known a height sensor electrical or plausibility fault to trigger reduced gears, being a more normal result of a wheel speed sensor fault due to the vehicle speed being unreliable. It is feasible to get an ABS fault that doesn't re-occur for a long time, perhaps a flake of rust affecting the regularity of the sensor signals, a loose sensor or damaged wiring. DSC relying on wheel speed sensors increases the liklihood that it was at least a plausibility fault, if not an electrical fault. With all my experimenting that sometimes caused suspension faults, not once was there a fault that caused reduced gears. Reading ABS and suspension ecu stored fault codes would be the only way to establish or discount a cause.

I agree that the LR probably expect the lowered stance to be used only on smooth roads. I use the height only in special circumstances and on relatively smooth roads mostly because more bumps cause the suspension to thump.

Quite a few years ago, I had a peculiar fault that froze the D3 at extended mode. Driving 400km home, I had quite a few DSC activations and then finally a "reduced gears" fault. So something cascaded the error into the TCM.

I'd note that when the car drops itself to the -20mm setting, it knows about it, and can adjust DSC calibration etc accordingly. If you modify the heights with LLAMS or rods, it doesn't. I always caution people fitting the two-way rods to only use the additional heights when required. I doubt that it could cause a permanent fault or problem though.

Cheers,

Gordon