ASR & ESP

spotty
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ASR & ESP Jul 3, 2015 19:56:37 GMT 1 Hooters likes this

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Post by spotty on Jul 3, 2015 19:56:37 GMT 1

Many cars have a traction control system which is designed to improve grip when the driven wheels lose traction, the method by which traction is restored is by means of cutting the power or applying the brake to the spinning wheel. It usually has a switch with something like ASR (Anti Slip Regulation) written on it which when operated will disable the system and illuminate a warning light on the dash.

Some cars may have an Electronic Stability Program (ESP) which is a system designed to correct a skid and keep the car on the road. This works by monitoring the cars position, lateral & longitudinal acceleration and steering wheel angle to determine if the car is skidding, to correct the skid it will brake individual wheels/cut the power to keep the car on course.

The MOT testers manual only mentions ESP (ESC in the manual), so given that both systems have a switch and often use an identical graphic for the warning light, has anyone got confused between the two systems?

Hooters
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ASR & ESP Jul 4, 2015 9:14:07 GMT 1 David likes this

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Post by Hooters on Jul 4, 2015 9:14:07 GMT 1

The forum had a discussion similar to this some time back and this contribution would have been well-placed there.

The acronyms used by manufacturers is staggering. I sometimes have to Google to find out what I'm looking at.

Liking the post spotty.

Hoots.

All advice is given in good faith and may reflect personal opinion only. It is always your own decision whether or not to follow this advice/opinion. The author accepts no responsibility for your actions and any consequences of these.

David
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ASR & ESP Jul 4, 2015 9:26:39 GMT 1

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Post by David on Jul 4, 2015 9:26:39 GMT 1

Jul 3, 2015 19:56:37 GMT 1 spotty said:

Many cars have a traction control system which is designed to improve grip when the driven wheels lose traction, the method by which traction is restored is by means of cutting the power or applying the brake to the spinning wheel. It usually has a switch with something like ASR (Anti Slip Regulation) written on it which when operated will disable the system and illuminate a warning light on the dash.

Some cars may have an Electronic Stability Program (ESP) which is a system designed to correct a skid and keep the car on the road. This works by monitoring the cars position, lateral & longitudinal acceleration and steering wheel angle to determine if the car is skidding, to correct the skid it will brake individual wheels/cut the power to keep the car on course.

The MOT testers manual only mentions ESP (ESC in the manual), so given that both systems have a switch and often use an identical graphic for the warning light, has anyone got confused between the two systems?

We actually test all forms of ESP/ESC or any other acronym meaning an abbreviation formed from the initial letters of other words and pronounced as a word spotty. The list is quite large and continually growing too. We have;

1. VDCS - Vehicle Dynamics Control System (automobile traction control)
2. ABC - Active Body Control
3. ACE - Active Cornering Enhancement
4. ARC - Active Roll Control
5. ASTC - Automatic Stability and Traction Control
6. ETC - Electronic Traction control
7. TCS - Traction Control System
8. DSC - Dynamic Stability Control
9. ESP - Electronic Stability Programme
10. PSM - Porsche Stability Management

...to name but a few.

We have to be certain that an illuminated lamp indicates an ESC malfunction. This may require reference to the owner’s handbook if one is available.

If not P&A mate

Last Edit: Jul 4, 2015 9:28:50 GMT 1 by David -

It’s not that I’m so smart, it’s just that I stay with problems longer.
—Albert Einstein

Hooters VTS Council member Posts: 1,122 Class tested: 4, 5L, 7 Last Online: May 2, 2024 17:16:52 GMT 1 Likes: 783	ASR & ESP Jul 4, 2015 10:00:42 GMT 1 David and pete like this Back to Top Quote Select Post Deselect Post Link to Post Back to Top Post by Hooters on Jul 4, 2015 10:00:42 GMT 1 A bit off-topic here, but I could do with a few of those when I walk home from the pub. lol.
	All advice is given in good faith and may reflect personal opinion only. It is always your own decision whether or not to follow this advice/opinion. The author accepts no responsibility for your actions and any consequences of these.

nitros44
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ASR & ESP Jul 19, 2015 21:22:10 GMT 1 via mobile

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Post by nitros44 on Jul 19, 2015 21:22:10 GMT 1

Jul 4, 2015 9:26:39 GMT 1 David said:

Jul 3, 2015 19:56:37 GMT 1 spotty said:

Many cars have a traction control system which is designed to improve grip when the driven wheels lose traction, the method by which traction is restored is by means of cutting the power or applying the brake to the spinning wheel. It usually has a switch with something like ASR (Anti Slip Regulation) written on it which when operated will disable the system and illuminate a warning light on the dash.

Some cars may have an Electronic Stability Program (ESP) which is a system designed to correct a skid and keep the car on the road. This works by monitoring the cars position, lateral & longitudinal acceleration and steering wheel angle to determine if the car is skidding, to correct the skid it will brake individual wheels/cut the power to keep the car on course.

The MOT testers manual only mentions ESP (ESC in the manual), so given that both systems have a switch and often use an identical graphic for the warning light, has anyone got confused between the two systems?

We actually test all forms of ESP/ESC or any other acronym meaning an abbreviation formed from the initial letters of other words and pronounced as a word spotty. The list is quite large and continually growing too. We have;

1. VDCS - Vehicle Dynamics Control System (automobile traction control)
2. ABC - Active Body Control
3. ACE - Active Cornering Enhancement
4. ARC - Active Roll Control
5. ASTC - Automatic Stability and Traction Control
6. ETC - Electronic Traction control
7. TCS - Traction Control System
8. DSC - Dynamic Stability Control
9. ESP - Electronic Stability Programme
10. PSM - Porsche Stability Management

...to name but a few.

We have to be certain that an illuminated lamp indicates an ESC malfunction. This may require reference to the owner’s handbook if one is available.

If not P&A mate

Where did this list come from?
Some of these systems listed have no bearing on stability and are more to do with passenger comfort.!!!
Traction control is not testable

I might not be the best,but i was always in the top one

David
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If the facts don't fit the theory, change the facts. Albert Einstein

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ASR & ESP Jul 20, 2015 11:38:22 GMT 1 nitros44 likes this

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Post by David on Jul 20, 2015 11:38:22 GMT 1

VDCS used by Subaru for corner stability

ABC used by Mercedes and it allows control of the vehicle body motions and therefore virtually eliminates body roll in many driving situations including cornering, accelerating, and braking

ACE used by Land Rover and basically it's an system that controls body roll and adjusts the suspension accordingly

ARC is an electric active roll control (ARC) system controls body roll angle with motor-driven actuators installed in the centers of the front and rear stabilizer bars

ASTC is a computerised technology that improves a vehicle's stability by detecting and reducing loss of traction (skidding). When ESC detects loss of steering control, it automatically applies the brakes to help "steer" the vehicle where the driver intends to go

ETC See above

TCS is a traction control system (TCS) is typically (but not necessarily) a secondary function of the electronic stability control (ESP) on production motor vehicles, designed to prevent loss of traction of driven road wheels. TCS is activated when throttle input and engine torque are mismatched to road surface conditions. Typically, traction control systems share the electrohydraulic brake actuator (which does not use the conventional master cylinder and servo) and wheel speed sensors with ABS.

DCS Dynamic Stability Control used by BMW adds to safety by facilitating vehicle control even in adverse driving conditions or on tough surfaces. It ensures the highest possible levels of stability when driving, and it maximizes traction of all wheels when setting off or accelerating. It is able to detect the first signs of oversteering or understeering and helps keep the vehicle safely on course, even if the tyres have varying levels of grip

ESP See ATSC

PSM Porsche Stability Management (PSM) is fitted as standard. This system automatically maintains stability and traction even at the limits of dynamic driving performance. Sensors continuously monitor the direction, speed, yaw velocity and lateral acceleration of the car. Using this information, PSM is able to calculate the actual direction of travel at any given moment. If the car begins to oversteer or understeer, PSM applies selective braking on individual wheels in order to restore stability

Traction control is integral to all forms of stability control so we actually do fail TCS's when we fail Electronic Stability Control Systems

It’s not that I’m so smart, it’s just that I stay with problems longer.
—Albert Einstein

nitros44
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ASR & ESP Jul 21, 2015 23:07:33 GMT 1

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Post by nitros44 on Jul 21, 2015 23:07:33 GMT 1

David
Thanks for the list and brief explanation of modern electronic systems found on vehicles today,although some are not relevant.
When I say not relevant i am on about the ones that won't help the driver point the vehicle in the direction where he wants it to go.
Now I am all for comfort when driving ,but the last thing on my mind during a possible loss of control and possible death is at least If i do crash then at least it will be in COMFORT.

Stability control systems are make and model dependent and unless the tester knows for sure or has the correct info from a reliable souce ie drivers handbook,there's not much choice but to pass and advise.Point I am trying to make here is "be careful"

You mention traction control:
A vehicle with traction control illuminating its warning lamp is not a reason for rejection
And it would be hard to fail a ESP system where only it's traction control system is faulty as the ESP system will still work.
Traction control regulates the speed of the wheels,
ESP helps the driver point the vehicle where he wants it go

I might not be the best,but i was always in the top one

David Administrator Owner\Director, AE\NT\SM, DVSA VTS Council Member, Registered Member & Administrator of The MOT Testers & AE's Forum If the facts don't fit the theory, change the facts. Albert Einstein Posts: 6,723 Class tested: 4 Last Online: May 3, 2024 17:32:27 GMT 1 Likes: 965	ASR & ESP Jul 22, 2015 0:24:29 GMT 1 Back to Top Quote Select Post Deselect Post Link to Post Back to Top Post by David on Jul 22, 2015 0:24:29 GMT 1 Its OK mate, I'd missed that when typing it out to be honest....
	It’s not that I’m so smart, it’s just that I stay with problems longer. —Albert Einstein

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Post by spotty on Jul 3, 2015 19:56:37 GMT 1

Post by Hooters on Jul 4, 2015 9:14:07 GMT 1

Post by David on Jul 4, 2015 9:26:39 GMT 1

Post by Hooters on Jul 4, 2015 10:00:42 GMT 1

Post by nitros44 on Jul 19, 2015 21:22:10 GMT 1

Post by David on Jul 20, 2015 11:38:22 GMT 1

Post by nitros44 on Jul 21, 2015 23:07:33 GMT 1

Post by David on Jul 22, 2015 0:24:29 GMT 1