A: The traction control is usually under the hood inside the anti-lock braking system (ABS) control module. It consists of programming within the ABS electronic control unit (ECU) algorithms and extra valving in the ABS hydraulic control unit (HCU). It’s usually pretty easy to find but can be difficult to access.
The exact location of the traction control module varies from vehicle to vehicle. When in doubt, it’s always a good practice to consult your vehicle owner’s manual.
For example, some vehicles will have their traction control modules within the ABS control module, while others have their traction control modules in the rear-end, inside the trunk.
Traction control engages when one wheel is spinning and the other one isn’t due to differential action. If you’ve ever tried to take off on slippery pavement, in mud, on ice, or in wet grass, you’ve experienced this.
The traction control system (when the vehicle is equipped with it) is part of the anti-lock braking system (ABS), which reads wheel speed. When one wheel is spinning and the other one isn’t on the drive axle while you’re pulling away from a stop, the ABS hydraulic control unit will deliver pulses of brake fluid pressure to the spinning wheel, which forces torque to be delivered to the non-spinning wheel, providing more even traction.
As always, when accessing any electrical components of your vehicle like modules and the like, it’s important to disable and disconnect the car battery first.
Any information provided on this Website is for informational purposes only and is not intended to replace consultation with a professional mechanic. The accuracy and timeliness of the information may change from the time of publication.