Mazda 2006 MX-5 Service Highlights page 255

During DSC control (suppress oversteer tendency)
• When a large oversteer tendency is determined, the traction switch and the stability control solenoid valves are
energized, switching the hydraulic circuits. At the same time, the pump motor is actuated to operate the pump,
supplying brake fluid pressure from the reservoir to the outer front wheel cylinder. Also at this time, the inlet
solenoid valve of the inner rear wheel is energized and the hydraulic circuit of this wheel is closed.
• After a pressure increase, brake fluid pressure is adjusted using the three pressure modes (reduction,
maintain, increase) so that the target wheel speed is obtained. (The following figure shows a left turn (during
pressure increase mode).)
Solenoid valve operation table
Traction control
solenoid valve
LF—RR RF—LR
During
pressure ON
increase (closed)
mode
During
pressure OFF OFF
maintain (open) (closed)
mode
During
pressure OFF OFF
reduction (open) (closed)
mode
Hydraulic circuit diagram
MASTER CYLINDER
STABILITY
CONTROL
SOLENOID
VALVE
INLET
SOLENOID
VALVE
OUTLET
SOLENOID
VALVE
DYNAMIC STABILITY CONTROL
Stability control
Inlet solenoid valve
solenoid valve
LF—RR RF—LR LF
ON
OFF ON
(clos
(closed) (open)
ed)
OFF
OFF (closed) (ope
n)
OFF
OFF (closed) (ope
n)
P
DAMPER CHAMBER
TRACTION
CONTROL
SOLENOID
VALVE
PUMP
RESERVOIR
INLET
SOLENOID
VALVE
OUTLET
SOLENOID
VALVE
RF
LR
PRESSURE
INCREASE
Outlet solenoid valve
RF LR RR LF
OFF ON OFF
(ope (clos (ope OFF (closed)
n) ed) n)
ON OFF ON
(clos (clos (ope OFF (closed)
ed) ed) n)
ON OFF ON OFF
(clos (clos (ope (clos (ope
ed) ed) n) ed)
BRAKE FLUID
PRESSURE SENSOR
PUMP
MOTOR
RR
Pump
motor,
pump
RF LR RR
Operating
Operating
ON OFF ON
(clos (ope Operating
n) ed) n)
LF
E5U415ZS5017
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