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HOMESERVICE MANUALSHONDA2011CR-V EX, 2.4 RE3, BZJAREPAIR AND DIAGNOSISBRAKESTRACTION CONTROLVSA (VEHICLE STABILITY ASSIST) SYSTEM COMPONENTSSYSTEM DESCRIPTIONMODULATOR UNIT
2011 Honda CR-V EX, 2.4 RE3, BZJA

Modulator Unit

2011 Honda CR-V EX, 2.4 RE3, BZJASECTION Modulator Unit

The modulator unit consists of the inlet solenoid valve, the outlet solenoid valve, the VSA NO (normally open) solenoid valve, the VSA NC (normally closed) solenoid valve, the reservoir, the pump, the pump motor, and the damping chamber.

The hydraulic control has three modes at ABS action; pressure intensifying, pressure retaining, and pressure reducing. And pressure adding mode is combined at TCS, VSA, and brake assist action.

The hydraulic circuit is an independent four channel type; one channel for each wheel.

Fig 1: Modulator Unit Hydraulic Circuit Diagram
G06611262Courtesy of AMERICAN HONDA MOTOR CO., INC.
MODULATOR UNIT REFERENCE CHART

Mode VSA NO Valve VSANC Valve Inlet Solenoid Valve Outlet Solenoid Valve Brake Fluid
Pressure intensifying mode  open closed open closed Master cylinder fluid is pumped out to the caliper.
Pressure retaining mode  open closed closed closed Caliper fluid is retained by the inlet and outlet valves.
Pressure reducing mode  open closed closed open
  • Caliper fluid flows through the outlet valve to the reservoir.
  • The motor pumps the reservoir fluid through the damping chamber to the master cylinder(1).
Pressure adding mode  closed open open closed
  • Master cylinder fluid is pumped out by pump with motor through VSA NC valve to the caliper.
  • Caliper fluid pressure exceeds master cylinder pressure.
(1) The motor will keep running until the operation of the one anti-lock brake control is finished with the first pressure reducing mode.
RENDER: 1.0x

NO RELATED

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