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.
Standard ABS
Standard ABS consists of the following components:
- ABS module
- Hydraulic control unit (HCU) (LH side of the engine compartment, behind the degas bottle)
- Front wheel speed sensor
- Front wheel speed sensor ring (press fit onto the brake disc)
The ABS prevents wheel lock up by monitoring the front wheel speed sensors and the transmission output shaft speed (OSS) sensor, actuating the valves in the HCU, which modulates the brake pressure to the brake calipers. 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 is controlled by the PCM and utilizes the ABS module for wheel speed information only. Engine only traction control (EOTC) helps maintain vehicle control during acceleration by modulating engine torque when driving on slippery or loose surfaces.
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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.