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 pressure sensor is installed in the HECU (Hydraulic and Electronic Control Unit) in the purpose of sensing the driver's braking intention. This sensor has two circuit to measure the current pressure and one circuit to measure the brake oil's temperature. The HECU (Hydraulic and Electronic Control Unit) compares two signals of the pressure sensor and if it differs with normal range, the HECU (Hydraulic and Electronic Control Unit) would judge that the pressure sensor has a fault. The sensor's output is a analog signal to be proportional to the supply voltage. The HECU (Hydraulic and Electronic Control Unit) measures the pressure value by the ratio of signal voltage to supply voltage. In a case of SCC (Smart Cruise Control) system applied, the two more pressure sensors is added to measure the brake oil's pressure of wheel.
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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.