Honda Element. Manual - part 788

 

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Honda Element. Manual - part 788

 

 

control unit engages brake assist. 

Because the brake system pressure crossed the threshold before the time threshold had expired, the VSA 
modulator-control unit goes into brake assist mode. 

Fig. 11: Pressure And Time Graph 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Normal Braking 

During normal braking conditions, brake assist does not affect brake system pressure. 

Panic Stop 

During a panic stop, the control unit turns the VSA pump ON, and opens the inlet valve. This brings the brake 
system pressure up high enough to cause a full ABS stop. As soon as the brake pedal is released, brake assist is 
stopped and the brake system returns to normal operation. 

MODULATOR UNIT 

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

The modulator controls the caliper fluid pressure directly. It is a circulating-type modulator because the brake 
fluid circulates through the caliper, the reservoir, and the master cylinder. 

The hydraulic control has three modes: Pressure intensifying, pressure retaining, and pressure reducing. 

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

ABS CONTROL 

 

2007 Honda Element EX 

2007-2008 BRAKES VSA (Vehicle Stability Assist) System Components - Element

  

Pressure Intensifying Mode 

VSA NO valve open, VSA NC valve closed, inlet valve open, outlet valve closed. 

Master cylinder fluid is pumped out to the caliper. 

Pump Motor 

When starting the pressure reducing mode, the pump motor is ON. When stopping ABS operation, the pump 
motor is OFF. 

The reservoir fluid is pumped out by the pump, through the damping chamber, to the master cylinder. 

Fig. 12: Pump Motor System Diagram 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Pressure Retaining Mode 

VSA NO valve open, VSA NC valve closed, inlet valve closed, outlet valve closed. 

Caliper fluid is retained by the inlet valve and outlet valve.

 

2007 Honda Element EX 

2007-2008 BRAKES VSA (Vehicle Stability Assist) System Components - Element

  

Fig. 13: Pressure Retaining Mode - System Diagram 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Pressure Reducing Mode 

VSA NO valve open, VSA NC valve closed, inlet valve closed, outlet valve open. 

Caliper fluid flows through the outlet valve to the reservoir. 

Fig. 14: Pressure Reducing Mode - System Diagram 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

TCS CONTROL 

Pressure Intensifying Mode 

VSA NO valve closed, VSA NC valve open, inlet valve open, outlet valve closed, pump motor ON. 

The reservoir and master cylinder fluid is pumped out by the pump, through the damping chamber, to the front 
caliper. 

 

2007 Honda Element EX 

2007-2008 BRAKES VSA (Vehicle Stability Assist) System Components - Element

  

Fig. 15: TCS Control - Pressure Intensifying Mode 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Pressure Retaining Mode 

VSA NO valve closed, VSA NC valve open, inlet valve closed, outlet valve closed, pump motor ON. 

Front caliper fluid is retained by the inlet valve and outlet valve. 

Fig. 16: TCS Control - Pressure Retaining Mode 
Courtesy of AMERICAN HONDA MOTOR CO., INC. 

Pressure Reducing Mode 

VSA NO valve open, VSA NC valve closed, inlet valve closed, front outlet valve open, pump motor ON. 

Caliper fluid flows through the outlet valve to the reservoir.

 

2007 Honda Element EX 

2007-2008 BRAKES VSA (Vehicle Stability Assist) System Components - Element

  

 

 

 

 

 

 

 

Content   ..  786  787  788  789   ..