997.2 Traction Control

[hondansx]

Hi Guys,

I have been making the most of the recent weather in the C4S; i've been hitting the button to turn off the aids as soon as i start up. The car slides nicely before the 4WD gets a hold and impressively brings oversteer into an a neat four-wheel slide.

However, tonight on my drive home i felt the throttle being interrupted and the slide died. I glanced at the dash and it was flickering at me - something was stopping me!

There seems to be no drawn out procedure; if i hit the button it beeps and tells me ESP is off. I tried holding down the button but it beeped instantly once more. Am i doing something wrong? Is the car telling me it doesn't want to abused? I'm sure it's not done it before...

Cheers!

[scarebus]

Might have some thing to do with resetting itself if you've triggered the ABS, used to catch me out...

[scarebus]

Might have some thing to do with resetting itself if you've triggered the ABS, used to catch me out...

[hondansx]

Happened again this morning, it's not like VAG cars where it's never truly off, is it? Very unlike Porsche though...

This morning i was on a large, empty roundabout and prodded the throttle (no problem), then backed off a little, reapplied throttle and i saw the light flashing away at me again.

[SkinnyP]

Was the light on permanently before it started to flash?

If so I believe thats the automatic brake differential in action, and you can't turn it off. Irornically I was meaning to make a thread about it.

[SkinnyP]

OP is yours a 997 or 991? Iirc PSM off on the 997 means off.

[hondansx]

It's a 997.2, like it says in the title

So is it trying to brake individual wheels then or something? I remember when i forgot to turn everything off on my CSL once and i absolutely ruined the brakes within an hour on a track day as a result!

[Magic919]

The 997.2 C4S has apparently got a locking diff, unlike the C2S. I'd expect it is the PSM kicking in when it detects you letting off the throttle. I'll have a read of my book and see what it says.

Is this in Sport or Sport plus mode?

[SkinnyP]

Err yes, I knew that

ABD brakes the spinning wheel to send power elsewhere, there is not much in the manual other than ‘stops one-sided spinning’.

Not sure why you’d need it on a C4S, maybe it’s because it’s the girl’s version

[Magic919]

It reads as though ABD stays on at all times. PSM should stay off unless a wheel needs ABS. PSM threshold higher in sport mode. That's about all I can glean.

[SkinnyP]

Thats my understanding.

Normally these systems turn off at a certain speed, I know on something like a Focus ST it stops working above 25mph but I cant find any such limit for the 987/997.

[Magic919]

There is mention of them being more relaxed up to 45 mph.

[hondansx]

SkinnyP said:

Not sure why you’d need it on a C4S, maybe it’s because it’s the girl’s version

Should have seen that coming!

Interesting. A little disappointing; i'd like to see if the speed makes a difference but not sure trying to get the car sliding above 45mph is the most intelligent decision.

Thanks for doing the research!

[SkinnyP]

To be honest I'm surprised it slides at all, four wheel drive, huge chunky tyres and an LSD!

[hondansx]

Yeah, it has to be provoked in a quite unsubtle way! I have wider tyres than stock too, but they are not good in wet so that helps. It is much easier and more progressive in the GT3.