Traction control inactive at high speed

[stevedee3]

Hi all,

I've noticed on my C that the traction control doesn't seem to work at high(ish) speeds. Above about 60 km/h (40 miles/h) it seems that car is quite happy to let the wheels spin. For example, in second gear at 70 km/h on a wet road it's quite easy to get the speedo (but not the car!) up to around 100km/h without the TC system intervening. Does anyone know why this is the case? I'm assuming it's a design restriction and not a fault... Car is a manual 3.2V6 with ESP/TC.

Ta.

[ed taylor]

I may be wrong, but I was under the impresion that the TC did not work at speeds above 40mph...

[AJA]

I think Ed is on the right track here. I'm sure it turns itself off above a certain speed.

[stevedee3]

I recall reading that in various places. I'm just wondering why - surely it's not impossible to detect and control wheel slip at high as well as low speeds.

[ukanalyst]

I read a thread on here the other day where someone stated that Traction switches off above 56mph on the Vectra-C. Can't vouch for how correct or not this is.

Dave

[AJA]

I wonder if it has something to do with safety. At high speeds it's sometimes better to slightly spin a wheel or wheels rather than have a dip in power.

[TechWolf]

Hi all,

I've noticed on my C that the traction control doesn't seem to work at high(ish) speeds.

Mine does ... the same did my Astras ....

[ed taylor]

That is what I was thinking Alex, if the engine shuts down at speed or the car automaticaly slows down it might be considered to be a safty aspect, in any case if you are doing say 50mph and you get wheelspin the momentum of the moving car will make you "go over" the slippy patch anyway....

[Bainie]

I thought it was the other way round, even if you manually switch the TC off it turns itself back on after 30mph ? This is why you need to pull the fuse on an RR ?

[AJA]

I have the TC switch and turning it off allows my car to run on a Rolling Road with no problem. I'm confused now!