DTSC wtf is that all about

[MoleT-5R]

yeah you have to go through a menu on the stalk, just like your trip comp but its more fiddly than pushing the button on your dash

to right it's a fiddle and if it's already active it doesn't seem to be disabled until it's inactive, which is a fiddle when you suddenly realize that you need to disable it in a hurry as the conditions dictate it will hinder you rather than help, suppose it's just one of those plan a head things that I'll get used to doing, can't she the Mrs's doing it until it stops though....oh no, then finds it diffcult to get going again...lol

[volvokid]

to right it's a fiddle and if it's already active it doesn't seem to be disabled until it's inactive

What do you mean by that? I really should be getting to bed now lol

[MoleT-5R]

What do you mean by that? I really should be getting to bed now lol

I meant that you can't switch it off if it's working, until it stops working. Good night, I must get off to, work tomorrow unfortunately

[volvokid]

Ah I see now, Yeah that is a pain

[LeeT5]

The point that I'm trying to make that in rural hilly locations dtsc is useless,.........

Reducing the dtsc level........

I doubt if Lee will ever experience this as I would think his beautiful V70R awd would be safely tucked away from any severe weather like this and who could blame him

Firstly it's DSTC, not DTSC.

Secondly my car is parked outside come rain or shine. It's not wrapped in bubble wrap nor cotton wool. it's used as a daily runner and at weekends when i'm not working and i don't care if it's raining monsoon, snowing white out or 30+...my car is driven in all conditions and has been driven in deep snow.

pushing the button 5x doesn't totally disable it, I did it in the snow and it still kicked in.

Pressing the button 5 times for 1 sec each depress Fully disables the Dynamic Stability program

Aaah but was that the DTSC or the ESP? The anti-skid control system doesn't get turned off and has the ability to cut the throttle if it things are really bad (IIRC)

DSTC / ESP (Electronic Stability Program) are tantamount to the same thing. They are just called different things by Manufacturers.

Depending on whether you have DSTC or STC will depend on whether you can reduce or totally disable the system.

As you say Martin, as it appears in the handbook, that the spin (wheel-spin) control is the only one that can be lowered Active Yaw Control (stability) can't be switched off and would still be able to cut power and apply the brakes when it things it's needed to keep stability, I'll have a play with it on my way to work tomorrow, as I can't remember what was said on the dash as I attempted to turn the functions off and there's no snow to play in now, who would believe we could go from 6 inches to nothing in less than 24 hours

Active Yaw Control minimizes under-steer and over-steer. This is all controlled by the ABS module and cannot be disabled unless you have an R model.
To fully disable AYC you need to press the DSTC button 5 times, pressing on 1 sec and off 1 sec. 'DSTC REDUCED FUNCTION' will be displayed on the DIM display.
In other models, inc R - pressing the STC/DSTC button once will fully disable Stability Control and partially disable the AYC.
There is no such thing as 'spin control' and as I've said, AYC can be partially disabled in ALL cars that have the STC/DSTC button and in R models can be FULLY disabled.

If you push the button once, it says stability control reduced, or something like that, if pushed 5 times it tells you its off, mine was off but it still functioned to some extent.

I suspect you were seeing the yellow triangle flashing in the middle of the DIM. This flashes when either the TC is working, AYC is working or SC (skid control) is working. It will illuminate all the time if there is a fault.
Traction control cannot be disabled in any system whether you have DSTC or STC.
AYC (Active Yaw Control) is functional in all systems, however, in the R models AYC is also controlled by the shock absorbers and activates sooner.

Terminology

TC - Traction Control - Transfers power from spinning wheel to wheel that is now spinning by braking the spinning wheel (cannot be disabled, ALL models)
SC - Stability Control - prevents wheels spinning when accelerating (Recommended to disable when in deep snow
AYC - Active Yaw Control - Stabilizes the car if it starts to skid by braking one or more wheels automatically (Cannot be disabled except R models)

In R models the DSTC is a lot more sophisticated and controls the following:

Dive and Lift control, Brake Grip control, Dynamic body control, Load dependent control, Bump and Rebound control, Wheel Hop control, Dynamic Cornering control, Active Yaw control, Advanced Sport control.

If anyone wants a breakdown of any of these functions and how they work then PM me and i will en devour to enlighten you.

[M-R-P]

Firstly it's DSTC, not DTSC.

DSTC / ESP (Electronic Stability Program) are tantamount to the same thing. They are just called different things by Manufacturers.

I was under the impression the DSTC (Dynamic Stability Traction Control), when turned off, showing the message "anti-spin control off" turned the anti - spin (traction control) off, allowing wheelspin but the ESP being an anti - skid system, which controls brake distribution and throttle was kept on as a means of preventing the car skidding under emergency conditions like simultaneous hard braking and cornering?

[LeeT5]

I was under the impression the DSTC (Dynamic Stability Traction Control), when turned off, showing the message "anti-spin control off" turned the anti - spin (traction control) off, allowing wheelspin but the ESP being an anti - skid system, which controls brake distribution and throttle was kept on as a means of preventing the car skidding under emergency conditions like simultaneous hard braking and cornering?

Nope.

You cannot fully disable (turn off) the DSTC, unless you own an R model, therefore you are merely reducing its functionality when you press the DSTC button. Forget R models for a minute...when you press the DSTC button you will deactivate the SC (Stability Control) NOT THE TRACTION CONTROL and reduce the AYC. All other functions are not affected. With the R models its the same, the only difference is we (meaning R owners) can FULLY DISABLE the AYC and the SC. This does not affect the AYC that the shock absorbers control on the Four-C system....that is totally different.

Don't confuse anti Spin control and traction control, they are NOT the same thing.

I reiterate...you CANNOT disable the Traction control on ANY system, even on the R models, only the Stability Control.

[M-R-P]

So, DSTC on - I can't wheelspin on ice/slush/puddles as it cuts the throttle (much to my annoyance, as I was trying to show-off the nice turbo chatter inducing device I fitted) but when I turned the DSTC off I got wheelspin and as much as I wanted. That was the stability control? I thought "traction control" controlled traction? If you can't turn it off, what was going on?

If there's no such thing as spin control - why does my DIM say "Spin control off/on" when I press the DSTC button?

[LeeT5]

So, DSTC on - I can't wheelspin on ice/slush/puddles as it cuts the throttle (much to my annoyance, as I was trying to show-off the nice turbo chatter inducing device I fitted) but when I turned the DSTC off I got wheelspin and as much as I wanted. That was the stability control? I thought "traction control" controlled traction? If you can't turn it off, what was going on?

If there's no such thing as spin control - why does my DIM say "Spin control off/on" when I press the DSTC button?

"Spin control off/on" --- its just Volvo terminology. In my car it says "DSTC FUNCTION REDUCED".

Traction control transfers the motive power from a driving wheel that spins on the road surface to the drive wheel that does not spin by braking the wheel that starts to spin. You will hear a pulsing sound when it is working and is completely normal. It cannot be deactivated. If you were flooring it then the TC will not work and you will get wheel spin. If you do it again on low revs and gentle acceleration then the TC system will work (unless yours is faulty), however if it was faulty then the yellow triangle would be illuminated all the time.

[M-R-P]

Interesting - the vail of confusion is gradually lifting...

So it was the stability thingy that was cutting the throttle and because both front wheels were spinning at roughly the same speed, the TC didn't get involved.

[LeeT5]

Interesting - the vail of confusion is gradually lifting...

So it was the stability thingy that was cutting the throttle and because both front wheels were spinning at roughly the same speed, the TC didn't get involved.

precisely.

[stribo]

Interesting - the vail of confusion is gradually lifting...

So it was the stability thingy that was cutting the throttle and because both front wheels were spinning at roughly the same speed, the TC didn't get involved.

precisely.

Not even close I'm afraid, the T/C monitors all 4 wheels so even if both your front wheels are spinning at the same speed, the y will be rotating faster than the rear wheels, and the T/C will step in and cut the power. This is why you have to turn T/C systems off on rolling roads, otherwise you won't get much of a power reading. I think what is happening when you press the button, the T/C is turned off, but the stability control is still on, so you'll still struggle to get, say, lift off oversteer.

[M-R-P]

Not even close I'm afraid, the T/C monitors all 4 wheels so even if both your front wheels are spinning at the same speed, the y will be rotating faster than the rear wheels, and the T/C will step in and cut the power. This is why you have to turn T/C systems off on rolling roads, otherwise you won't get much of a power reading. I think what is happening when you press the button, the T/C is turned off, but the stability control is still on, so you'll still struggle to get, say, lift off oversteer.

The stibility control has the ability to cut the throttle/power awd would work differently but on my fwd, the stability control would see the different hub speeds and read it as a skid, albeit a weird one and cut the power.

It took me a while to click onto what Lee was saying but I get it now. This is why AMGs burn their rear brakes out when the driver aids are turned - off. The TC is constantly stabbing away at the rear brakes, trying to get them to turn at the same speed as the front wheels.

[stribo]

But if your T/C was still on it wouldn't let the front wheels spin quicker than the rears, and you wouldn't be able to put it on a rolling road. As for Mercs, you can never fully turn off the driver aids.

[M-R-P]

But if your T/C was still on it wouldn't let the front wheels spin quicker than the rears, and you wouldn't be able to put it on a rolling road. As for Mercs, you can never fully turn off the driver aids.

The driver aid that doesn't turn off on the merc is the TC.
It's the stability that needs to be turned off on the rollers - on a fwd, the TC will only react if one of the driven wheels is moving faster than the other, it's the stability control that measures the speed of all four. You can run on the rollers with a fwd P2 and the yellow (don't drive like a prat) light will be going nuts, hence turning it off. Put an awd on the rollers and all the wheels will be going at the same speed anyway.

[LeeT5]

But if your T/C was still on it wouldn't let the front wheels spin quicker than the rears, and you wouldn't be able to put it on a rolling road. As for Mercs, you can never fully turn off the driver aids.

Read page 19 of your drivers hand book, under heading Traction Control, TC. The last sentence clearly says....(and i quote)....It cannot be deactivated.

The only part of the DSTC that can is the Stability Control and (R models ONLY) AYC.
AYC (Active Yaw Control) is reduced in ALL models and can be switched OFF in R Models.
AYC Cannot, i repeat cannot be turned off in non R models only reduced.

[stribo]

Read page 19 of your drivers hand book, under heading Traction Control, TC. The last sentence clearly says....(and i quote)....It cannot be deactivated.

Our's doesn't, we've got an R

[LeeT5]

The driver aid that doesn't turn off on the merc is the TC.
It's the stability that needs to be turned off on the rollers - on a fwd, the TC will only react if one of the driven wheels is moving faster than the other, it's the stability control that measures the speed of all four. You can run on the rollers with a fwd P2 and the yellow (don't drive like a prat) light will be going nuts, hence turning it off. Put an awd on the rollers and all the wheels will be going at the same speed anyway.

Hallelujah!!

[LeeT5]

Our's doesn't, we've got an R

What do you mean, it doesn't? what doesn't?

[MoleT-5R]

Firstly it's DSTC, not DTSC.

Secondly my car is parked outside come rain or shine. It's not wrapped in bubble wrap nor cotton wool. it's used as a daily runner and at weekends when i'm not working and i don't care if it's raining monsoon, snowing white out or 30+...my car is driven in all conditions and has been driven in deep snow.



Pressing the button 5 times for 1 sec each depress Fully disables the Dynamic Stability program



DSTC / ESP (Electronic Stability Program) are tantamount to the same thing. They are just called different things by Manufacturers.

Depending on whether you have DSTC or STC will depend on whether you can reduce or totally disable the system.



Active Yaw Control minimizes under-steer and over-steer. This is all controlled by the ABS module and cannot be disabled unless you have an R model.
To fully disable AYC you need to press the DSTC button 5 times, pressing on 1 sec and off 1 sec. 'DSTC REDUCED FUNCTION' will be displayed on the DIM display.
In other models, inc R - pressing the STC/DSTC button once will fully disable Stability Control and partially disable the AYC.
There is no such thing as 'spin control' and as I've said, AYC can be partially disabled in ALL cars that have the STC/DSTC button and in R models can be FULLY disabled.



I suspect you were seeing the yellow triangle flashing in the middle of the DIM. This flashes when either the TC is working, AYC is working or SC (skid control) is working. It will illuminate all the time if there is a fault.
Traction control cannot be disabled in any system whether you have DSTC or STC.
AYC (Active Yaw Control) is functional in all systems, however, in the R models AYC is also controlled by the shock absorbers and activates sooner.

Terminology

TC - Traction Control - Transfers power from spinning wheel to wheel that is now spinning by braking the spinning wheel (cannot be disabled, ALL models)
SC - Stability Control - prevents wheels spinning when accelerating (Recommended to disable when in deep snow
AYC - Active Yaw Control - Stabilizes the car if it starts to skid by braking one or more wheels automatically (Cannot be disabled except R models)

In R models the DSTC is a lot more sophisticated and controls the following:

Dive and Lift control, Brake Grip control, Dynamic body control, Load dependent control, Bump and Rebound control, Wheel Hop control, Dynamic Cornering control, Active Yaw control, Advanced Sport control.

If anyone wants a breakdown of any of these functions and how they work then PM me and i will en devour to enlighten you.

Thank you for clearing this up for us, I see what your saying and I apologize for making it sound that your car is bubble wrapped, but the last time I saw it, it looked that amazing I would never think that it lives outside rain or shine and driven in all weathers, well done to you for keeping it in such great condition