Suzuki GSF650A - Hydraulic Unit (HU) Description

ABS: 4E-4
Hydraulic Unit (HU) Description
B817H24501003
The hydraulic unit operates the solenoid valves based upon the signal which is output from the ABS control unit. The
brake fluid pressure is then adjusted accordingly. The hydraulic unit controls the front and rear brake systems
individually by operating separate components for the front and the rear, except for the pump drive motor, which is
shared by both systems.
Rear brake
light switch
Rear wheel
speed sensor
Front wheel
speed sensor
Rear system
Front system
ABS indicator light
Front brake
light switch
One-way
valve
One-way
valve
Damper
Reservoir
Reservoir
Solenoid
valve OUT
Solenoid
valve OUT
Solenoid
valve IN
Solenoid
valve IN
Motor
Rear brake
caliper
Front brake
caliper
Front brake lever/
master cylinder
ABS control unit
HU
M
Rear brake pedal/
master cylinder
I718H1450010-01