Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
ABS With Traction Control
The ABS consists of the following components:
- ABS module
- Front wheel speed sensors
- Front wheel speed sensor rings (integral to the front wheel bearing)
- Hydraulic control unit (HCU)
- Rear wheel speed sensors
- Rear wheel speed sensor rings (integral to the rear wheel bearing)
- Stability/traction control switch
The ABS prevents wheel lockup by monitoring the wheel speed sensors and actuating the HCU modulating the brake pressure to prevent wheel lockup. By preventing the wheels from locking up, the driver is able to maintain steering control and stop in the shortest possible distance under most conditions. The traction control system utilizes the same components as the ABS to prevent wheel spin and help maintain vehicle control during acceleration.
The front wheel speed sensor rings are integral to the front hub and bearing assemblies. Refer to FRONT SUSPENSION article.
The rear wheel speed sensor rings are integral to the rear hub and bearing assemblies. Refer to REAR SUSPENSION article.
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.