Suzuki 2006 GSF1200AK6 Supplementary Service Manual page 13

12 GSF1200AK6/SAK6 ('06-MODEL)
WHEN OPERATING THE ABS
Brake fluid pressure-decreasing mode
If the slip ratio exceeds the set value, or if a decrease of brake fluid pressure does not accelerate the wheel
to the set speed, high enough for the brake fluid pressure to be maintained constant, the ABS will lower the
brake fluid pressure to prevent the wheels from locking. At this time, the ABS control unit outputs the signal
to decrease the pressure. The solenoid valve coils are energized, close the inlet valve and open the outlet
valve. The brake fluid in the calipers flows through the outlet valve, pooled in the reservoir and then pumped
back to the master cylinder.
Motor:
ON
Pump
Reservoir
Brake fluid pressure-maintaining mode
If the braking or accelerating wheel speed exceeds the set value, the ABS temporarily maintains the proper
brake fluid pressure, regardless of whether there is a pressure increasing in the master cylinder. The ABS
control unit then outputs the signal to maintain the pressure, causing the inlet valve coil to be energized and
closing each valve. The master cylinder, brake calipers and reservoir are shut off, then the brake fluid pres-
sure at the calipers are maintained.
Motor:
ON
Pump
Reservoir
Kick back
Inlet:
ON
Solenoid valve
Outlet:
ON
Kick back
Inlet:
ON
Solenoid valve
Outlet:
OFF
Fluid pressure
at brake caliper
Brake
caliper
Fluid pressure
at brake caliper
Brake
caliper
Signal Fluid circuit
IN/V ON Close
OUT/V ON Open
Time
Signal Fluid circuit
IN/V ON Close
OUT/V OFF Close
Time