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: Description
The Rear Wheel Anti-Lock (RWAL) brake system is designed to control braking force of rear wheels. This serves to eliminate wheel lock and maintain directional stability during hard brake application. System consists of a wheel speed sensor (mounted in rear differential), pressure limit valve, RWAL Electronic Brake Control Module (EBCM) and connecting wiring harness.
Power is supplied to the RWAL EBCM through the RWAL power relay. System also utilizes a self-diagnostic function, which enables technician to quickly trouble shoot system by monitoring stored RWAL trouble codes through flashes of the BRAKE warning light.
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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