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.
General Information: General Description
The HECU (Hydraulic and Electronic Control Unit) is one body of the ECU (Electronic Control Unit) and HCU (Hydraulic Control Unit). The HCU consists of an accumulator, a return pump and solenoid valve assay. The increasing, maintaining and decreasing of brake pressure to each wheel cylinder is done by the electronic motor. And the brake pressure in accordance with the control logic is supplied by the pump on the basis of wheel speed sensor's signal.
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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.