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.
ABS System Relay
The ABS system relay is located in the Controller Anti-Lock Brake (CAB). See Figure . When CAB receives an ignition signal and verifies no stored diagnostic trouble codes, CAB energizes ABS system relay. When ABS system relay is energized, it provides voltage to pump/motor relay and to valves in valve block on Hydraulic Control Unit (HCU). When ABS system relay is de-energized, it supplies a ground circuit to turn on Amber ABS warning light.
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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.