Passport LX 4WD V6-3165cc 3.2L DOHC MFI (2001)
Electronic Brake Control Module: Description and Operation
System Components
Electronic Hydraulic Control Unit (EHCU), three Wheel Speed Sensors, Warning Light, and G-sensor.
Electronic Hydraulic Control Unit (EHCU)
The Electronic Hydraulic Control Unit (EHCU) consists of Anti-lock Brake System (ABS) control circuits, fault detector, and a fail-safe. The signal
received from each sensor activates the hydraulic unit accordingly and cancels the ABS to return to normal braking if a malfunction occurs in the ABS
system.
The EHCU has a self-diagnosing function which can indicate faulty circuits during diagnosis.
The EHCU is mounted on the engine compartment rear right side. It consists of a Motor, Plunger Pump, Solenoid Valves.
Solenoid Valves: Reduces or holds the caliper fluid pressure for each front disc brake or both rear disc brakes according to the signal sent from the
EHCU.
Reservoir: Temporarily holds the brake fluid that returns from the front and rear disc brake caliper so that pressure of front disc brake caliper can be
reduced smoothly.
Plunger Pump: Feeds the brake fluid held in the reservoir to the master cylinder.
Motor: Drives the pump according to the signal from EHCU.
Check Valve: Controls the brake fluid flow.
