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 Pump (Power Unit)
The power unit consists of an electric motor, filter, guide, piston rod and cylinder body. Guide is positioned offset to the center of the motor shaft. Rotation of motor and cylinder body provides the reciprocating motion to the piston rod. This pressurizes the brake fluid which is fed to relief valve, accumulator and modulator. As motor rotates and pressure in the accumulator exceeds a predetermined level, the pressure switch is turned on. Upon receiving this switching signal, the control unit stops pump motor relay operation. If accumulator pressure does not reach a predetermined level after pump motor has run continuously for at least 2 minutes, the ABS control unit stops pump motor operation and turns on ABS indicator light in instrument panel.
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.