Mazda RX-8 2004 Service Highlights page 319

SOLENOID VALVE FUNCTION
• All solenoid valves have superior responsiveness to hydraulic control.
• The solenoids have the following functions.
Function chart
Solenoid
Pressure control
ON/OFF
solenoid
Shift solenoid A
Shift solenoid B
Repeats ON and OFF
Shift solenoid C
at 50 Hz (20 ms cycle);
duty cycle type
Shift solenoid F
TCC solenoid
End Of Sie
05–13–28
AUTOMATIC TRANSMISSION
Type Characteristics
Normal high
(Supplies solenoid
pressure to pressure
control valve)
Normal high
(Supplies solenoid
pressure to amplifier
valve)
Normal low (Drains
solenoid pressure
supplied to amplifier
valve)
SHIFT SOLENOID F
SHIFT SOLENOID C
TCC SOLENOID
Function
Supplies or drains solenoid
pressure depending on
whether solenoid is
energized or de-energized
Controls supply and
drainage of solenoid
pressure, according to
change in on-time ratio (0-
100%) for one cycle
CHU051321280S01
PRESSURE CONTROL
SOLENOID
SHIFT SOLENOID A
SHIFT SOLENOID B
CHU0513S032
Switches between high
and low line pressure
Controls amplifier valve,
regulates low clutch
pressure
Controls amplifier valve,
regulates 2-4 brake
pressure
Controls amplifier valve,
regulates high clutch
pressure
Controls amplifier valve,
regulates low and reverse
brake pressure
Controls TCC engagement
and disengagement