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.
Anti-Lock Brake System - DENSO: Description
Anti-Lock Brake System (ABS) consists of an actuator, motor relay, solenoid relay, ABS Electronic Control Unit (ECU), and 4 wheel speed sensors. ABS system is Denso design. See Figure. An ABS warning light is located on the instrument cluster. Warning light comes on for 3 seconds as a bulb test when ignition is turned on. A primary check is performed after each engine start, and when initial vehicle speed exceeds 6 MPH. If brake pedal is pressed before vehicle speed exceeds 6 MPH, primary check will not occur until brake pedal is released.
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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.