Loss of power in rock mode.

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Originally Posted by Disco-tastic

Ive tried both. I leave it on for slow rocky stuff but have tried turning it off to climb a sandy ledge. Didnt make a difference - as soon as the wheels were slipping it would cut power.

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Makes sense because dynamic stability control is about loss of control of the vehicle at speed (yaw) whereas traction control is about limiting wheel slip and is how Land Rover control cross axle slippage in open diffs. DSC at low speed should do very little. On the beach though, where you have ruts etc that cause the vehicle to randomly yaw when going in a straight line, this can be seen by the vehicle as an uncontrolled movement that may be leading to a complete loss of control - hence DSC tries brake the respective wheels to stop the yawing motion. In sand this is bad news and slows the vehicle, bogging it.

I’m the same. DSC off for sand, it’s on for everything else with no ill effect.

For me - DSC off for everthing offroad - it stays off unless you overdo it in the power area or throw the car around too much. DSC kicking in in muddy tracks can throw the car sideways in the opposite direction the initial yaw direction was with possible dangerous ramifications.

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Originally Posted by DiscoJeffster

Makes sense because dynamic stability control is about loss of control of the vehicle at speed (yaw) whereas traction control is about limiting wheel slip and is how Land Rover control cross axle slippage in open diffs. DSC at low speed should do very little. On the beach though, where you have ruts etc that cause the vehicle to randomly yaw when going in a straight line, this can be seen by the vehicle as an uncontrolled movement that may be leading to a complete loss of control - hence DSC tries brake the respective wheels to stop the yawing motion. In sand this is bad news and slows the vehicle, bogging it.

I’m the same. DSC off for sand, it’s on for everything else with no ill effect.

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DSC will also limit power,particularly at speed in soft sand, the driver can have the loud pedal pushed to the floor, and revs disappear.
All forward motion will stop suddenly.

A Toyota Fortuna does the sama thing on sand according to a mate who went on the beach with me for the first time.
He commented that when he hit dry sand humps he lost power.

I asked him whether he had disabled DSC or whatever Toyota calls it and he looked at me blankly. He then tried with it disabled and bingo.

So it’s not only Land Rover.
Even my 19 MY Jazz has it for Gods sake.

March of the lawyers and bureaucrats.

regards PhilipA

Had similar in the work LV last week.
I have a 20km+ stretch of dirt to access my site. We’ve had quite a bit of rain and it was well awash last week.

Having driven it thousands of times I was motoring along and on a slight left found some very slippery sections.

Front goes left, rear goes right....

Tried to power drive out of it and the Toyota has decided to cut all power - zip, zero, zilch.... not fun when throttle would have solved the problem and the vehicle says no!

Had a bit of a play this weekend, at the same hill I was having problems with previously. Tried it again in rock mode, DSC on. Got exactly the same results. Tried mud and ruts mode, DSC off, much better. It was still cutting power a little, but not too bad. I will endeavour to do more testing.

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Originally Posted by Spence

Had a bit of a play this weekend, at the same hill I was having problems with previously. Tried it again in rock mode, DSC on. Got exactly the same results. Tried mud and ruts mode, DSC off, much better. It was still cutting power a little, but not too bad. I will endeavour to do more testing.

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I hope you are in low range. I didn't see any reference to that in your replies.

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Originally Posted by BobD

I hope you are in low range. I didn't see any reference to that in your replies.

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Yes, low range.