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.
System Description
- SYSTEM DESCRIPTION
HINT:
The skid control ECU is a single unit with brake actuator.
- ABS
(Anti-lock Brake System)
The ABS helps prevent the wheels from locking when the brakes are applied firmly or when braking on a slippery surface.
- EBD
(Electronic Brake force Distribution)
The EBD control utilizes ABS, realizing proper brake force distribution between front and rear wheels in accordance with driving conditions. In addition, when braking while cornering, it also controls the brake forces of right and left wheels, helping to maintain vehicle behavior.
- ABS
- ABS with EBD OPERATION
- Based on the signals received from the 4 wheel speed sensors, the skid control ECU calculates each wheel speed and deceleration, and checks wheel slipping condition. And according to the slipping condition, the ECU controls the pressure holding valve and pressure reduction valve in order to adjust the fluid pressure of each wheel cylinder.
- FAIL SAFE FUNCTION
- When a failure occurs in the ABS system, the ABS warning light comes on and operation is prohibited. In addition to this, when the failure which disables the EBD operation occurs, the brake warning light comes on as well and operation is prohibited (See FAIL-SAFE CHART ).
- COMPONENTS AND FUNCTION COMPONENTS AND FUNCTION
Components Function Skid Control ECU Calculates brake control in accordance with sensor signals. Speed sensor Detects speed of each wheel and inputs the data into the skid control ECU. Master cylinder Generates pressure according to pedal effort. Stop light switch Illuminates the brake light when the brake pedal is depressed. (Sends brake ON signal to skid control ECU)
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.
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