General Traction control and understeer

[ozzy1993]

Hi,
The issue i have is that traction control seems to cut in very late compared to other cars

1. From a standing start the car will spin it wheels until i get into second and the TC light flashes(ASR).
2. When going around corners traction control seems to kick in very late and no light flashes until a lift of a little (approx a 1 second delay)

I have tried the exact same thing in a golf gti and bmw 535 with TC kicking in immediately

car has decent tyres all round, plenty of tread (goodyear efficentgrip performace) set to the correct pressure.

any ideas?
Thanks

 

[aurick86]

On my bravo ASR kicks in really fast.. like when starting from a stop light, if it's about to slip it cuts power and bogs down a little...it feel like someone is learning to drive manual and releases the clutch a little to fast. BUT i don't see the light on the dash unless it really spins it's wheels.

What i do notice is that the ESP does work even if the ASR light does not flicker.. i've felt it many times pulling the car to a safer path and the light stayed off (mind you it could have been the smallest of adjustments like a 10th of a second.. not enough to set the light but enough to correct the path). If you've got snow/ice and a flat place like a parking lot, try to unsettle the car while doing 40km/h by steering right-left-right-.... you will feel the esp working to stabilize the car.

 

[cardinalbiggles]

Before anyone goes trying to make their car slide remember that not all Bravos have ESP.

 

[ozzy1993]

I always have the clutch in a bit when in 1st gear (not to much where it rides on the clutch), until i reach 2nd i will release quick, even then TC doesnt kick in.
When releasing clutch up quickly traction control should still be interfering no matter how fast you release the clutch.
Could it be that is how TC works for this model?

esp works fine and i dont think it can be turned off.

thanks

 

[cmosfxx]

-ESP systems is not my field of expertise- but I can tell you that what you are doing is totally wrong.

Not because you putting a lot (even though you think you don't) pressure on slave cylinders' clutch bearing (with all the negatives this can cause), BUT...

Clutch pedal has a sensor (a simple switch) that tells ECU when the clutch is pressed.
This switch is activated even with slightest pressure on clutch pedal.

This switch has a lot of functions. Fast-Fuel-cut on hard accelerations during gear changes, Cruise disabling, Hill holder activation (that's actually an ESP function) etc.

Maybe this has some affection on ESP traction system too but like I said this is out of my field so I can't tell for sure.

 

[lyubohar]

Could it be that is how TC works for this model?

Don't think so, my ASR kicks in the moment I stretch my leg to the accelerator without even touching it I mean it's almost impossible to make it spin wheels.

The ESP is not so sensitive though, I also find it hard to make it kick-in, which may be intentionally.

 

[aurick86]

Another thing you need to check is that you don't have any errors in the abs system..as that is how it knows if the wheels are rotating at different speeds.

The ASR uses lot of sensors.. so if one of them is not ok.. the you will have problems; check out the functional description for the system:


View attachment eLearn - ASR ESP.pdf

 

[carlorff]

It may sound like a silly question...but what kind of tyre sizes do you have front and back?

 

[RobW]

the car allows wheelspin in first gear and appears to start cutting wheelspin when in 2nd gear and actually moving

better to allow wheelspin than cut the power just when you need it

 

[l3v1athan]

the car allows wheelspin in first gear and appears to start cutting wheelspin when in 2nd gear and actually moving

better to allow wheelspin than cut the power just when you need it

Agree with Rob with this one. I still get wheelspin in first, especially when the wheels aren't straight. I have the factory standard tyres for my car, the Bridgestone Potenza RE50A 225/?45? R17 and these have pretty good grip. They slip for less than a second in first gear, until the grip and ASR kick in. They don't squeal much, but you can feel them on the edge of grip. So the car was designed to work allowing for slip in first until there is grip and the ASR will kick in to get it to a stage of grip. I've even gotten slip when changing into second, but that's because of uneven road surface and fine dirt on the road usually

 

[lyubohar]

Now when I think you guys are correct. I so rarely launch hard from stationary position, that I have forgotten how the car behaves

 

[ozzy1993]

Just had a quick go and the same results. Had it checked for error codes and came back with nothing. Was told by the dealer it was normal for the sport models to allow spin in 1st.

Tyre size 225-45-17

 

[l3v1athan]

Just had a quick go and the same results. Had it checked for error codes and came back with nothing. Was told by the dealer it was normal for the sport models to allow spin in 1st.

Tyre size 225-45-17

I dunno why you're making it as if it's a bad thing? It's allows for a quicker pull off, but won't wear tyres as much as having ASR completely off. If you don't want it spinning I suggest you pull off a bit differently. Rev at about 2000rpm to pull away and as soon as you release the clutch floor it if you still wanna get up to speed quickly

 

[ozzy1993]

I dunno why you're making it as if it's a bad thing? It's allows for a quicker pull off, but won't wear tyres as much as having ASR completely off. If you don't want it spinning I suggest you pull off a bit differently. Rev at about 2000rpm to pull away and as soon as you release the clutch floor it if you still wanna get up to speed quickly

I am not making it to be a bad thing, i just wasn't sure if it was a fault with my car or if that is how they are designed.
It would have been nice/beneficial if i didn't spin in first, especially in snow.

Still enjoying the car

Thanks all

 

[RobW]

I am not making it to be a bad thing, i just wasn't sure if it was a fault with my car or if that is how they are designed.
It would have been nice/beneficial if i didn't spin in first, especially in snow.

Still enjoying the car

Thanks all

have you considered winter tyres?

 

[cardinalbiggles]

I am not making it to be a bad thing, i just wasn't sure if it was a fault with my car or if that is how they are designed.
It would have been nice/beneficial if i didn't spin in first, especially in snow.

Still enjoying the car

Thanks all

If its ice or snow on the ground the traction control should kick in almost straight away with the amount of spin you will get.

My car will wheelspin on wet roads for a second then stop, if its icy the first you know about it is the amber light flashing.

Remember that the traction control works in two different ways as well so you may have spin but it may only be from one wheel.

 

[ozzy1993]

have you considered winter tyres?

not really had any use as there is no snow, will be considering them if and when it arrives