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 Control Module
The anti-lock brake system (ABS) is controlled by the anti-lock control module. The anti-lock brake control module receives wheel speed readings from each anti -lock brake sensor and uses the information to compare wheel speeds. By continuously monitoring and comparing the rotational speed of each wheel, the anti-lock brake control module activates the ABS only when it senses wheel lockup under severe braking conditions. The anti-lock brake control module decides which wheel is to be controlled and sends the appropriate signals to the hydraulic control unit (HCU). The anti-lock brake control module has self diagnostics capabilities and stores diagnostic trouble codes (DTCs) in its memory. If a trouble code is present in the anti-lock brake control module memory, the yellow ABS warning indicator will illuminate when the engine is running. The anti-lock brake control module is part of the EHCU.
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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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