Thread: When does TC not work

If youve stopped and shut down the restarted and dont go over about 7KPH then the TC wont activate as it wont have a base line to work from.

If youve blown a fuse that controls the TC or ABS the same deal applies.

so far thats the only reasons I know of that it wont try to do its job. If its a second hand vehicle the posability exists that someone has fitted a disable switch and hasnt told you about it. (dont ask me why they do, they just do)

it wont help you but it will work if your so badly hung up that the pull required to get you moving exceeds the traction you have availalble.


IF you dont get the ABS/TC/HDC lights turn on when you first turn on the ignition then you have electrical hassles.

Yours would have the CDL that you can activate with a spanner - 10mm I seem to recall. Put a $2 supermarket one in your glovebox or under the seat.

Lucky it wasn't a toyota driver that came along

TIM.

hed probabley just get out and whinge about his seats if he did.

Thanks Dave, Dan,

I cannot recall switching the ignition off, maybe I did for a while. The ABS TC HDC are still functioning, no amigos. Very good advice to know that in the future. cheers

I pack a 10mm spanner all the time, a very necessary addition as this also is the only essential tool to change the SLS airbags in an emergency. Getting to the spigot would have been near on impossible though, but yes, that was plan C.

Yes my biggest worry was a Toyota, but as it turned out the guy that stopped owned two 4WD's (dont know what) so my apologies to every LR owner for ruining our reputation.

The TC is pretty crude in the D2 compared with later cars, and you also need to aviod giving them too much throttle when traction is very limited as it sounds in your case. Clearly the stupid BMW engineer who signed off on taking out the diff lock lever should be shot, cos I bet you would have had a better chance with at least a back wheel helping out.

Did you try the extended mode for the rear suspension? I wonder if it makes any difference when articulated like that? May have increased the weight on the front.

Originally Posted by 4X4V8

The TC is pretty crude in the D2 compared with later cars, and you also need to aviod giving them too much throttle when traction is very limited as it sounds in your case. Clearly the stupid BMW engineer who signed off on taking out the diff lock lever should be shot, cos I bet you would have had a better chance with at least a back wheel helping out.

Did you try the extended mode for the rear suspension? I wonder if it makes any difference when articulated like that? May have increased the weight on the front.

Thanks 4X4V8, I tried all throttle speeds from a crawl to ..all of it!
I went in to the ditch with the SLS pumped up in Offroad Mode, so there was no more height that Extended Mode could have added.
My initial thinking is that there may be a maximum braking force that the TC brain will apply to the spinning wheel and not beyond, maybe to avoid unnecessary stress on the axels of the other wheels. But I'm just guessing here.

Now and then I engage the HDC to shake up the shuttle valve (on a small bitumen hill near my home), I think I'll check it again tonight and make positively sure its all still working, assuming if the HDC works the TC should be working.