Traction Control – What is it and its importance!

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Ever experienced that while driving at high speeds, you take a sharp turn and feel the back end of the car slipping outwards or the tires spinning if you pass through some dirt on the road. If you have, then your car probably doesn’t have traction control system, also known as electronic stability control.

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The basic idea behind traction system is to prevent loss of grip and further improve the grip of tires on the road. Loss of traction can occur due to multiple reasons including taking sharp turns at high speeds, dirt or wet roads, sudden acceleration/deceleration and numerous other reasons.

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Modern-day traction control systems are a built-in ECU function. All individual tires have speed sensors which keep track of speed of rotation of each tire. As soon as you lose traction, one or more tires start spinning at different speeds than the others. ECU monitors these reading and limits power to specific wheels to eliminate loss of traction. Modern-day ECU implements two methods to prevent loss of traction. Restricting power to wheels and using ABS. Once a wheel starts spinning faster than the rest, ABS module applies braking to control wheel spin and regain traction.

TRACTION CONTROL

Many people believe that traction control and electronic stability control is the same thing, but it is not. There is only a minor difference which is, traction control has the ability to only limit the power to the wheels while electronic stability control has the ability to both limit power to wheels and apply brakes.

Traction control is an essential safety feature. Almost all new cars everywhere around the world come with traction control or vehicle stability control as standard. All across America and Europe, it is mandatory for a car to have traction control to be allowed on the road. It really saddens me to say that here in Pakistan traction control is not a standard/mandatory feature. Putting aside CBU’s and imported cars, only the top of the line Honda Civic and Toyota Corolla Altis Grande comes with such an important driver aid such as traction control.

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If your car comes with traction/stability control, I would advise you always to keep it on because of it being an important safety feature, but it’s ok to disable it and lay some rubber once in a while.


Saad Ikram

Petrol head by a young age. My passion and obsession with cars began with the release of the Fast and Furious franchise. I love reading and writing about anything related to cars. Currently doing bachelors in computer science from FAST.

Notable Replies

  1. The difference between traction control and electronic stability program is not explained in a convincing way .
    ABS (anti-lock braking system ) have the ability to cut.off brake pressure to any wheel during braking . In this case brake pressure is generated by driver . For traction control and electronic stability program a pump is added to ABS module to generate brake pressure while brake is not pressed by driver . This means the ability to apply brakes to any of spinning wheel to gain traction (traction control).
    Now in esp two sensors are added which are called yaw sensor that determine the moving direction and steering angle sensors . Ecu determine understeer or oversteer based on drivers intention using steering sensor and the actual direction using yaw sensor and apply brakes to any wheel accordingly.
    Hope it is more clear to readers now .

  2. You are absolutely right. But i decided not to write the technical specification in that depth as this article was aimed at majority of the people who have no idea about traction control just to give them a basic idea :slight_smile:

  3. Nicely written article with basic information...I am pretty sure that majority of people are not well aware of this .... added information by Muhammad Ahmad also appreciated....

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