K2–48
AUTOMATIC TRANSAXLE
Function chart
Construction/Operation
Duty type
Normal high
• De-energized (OFF) or duty 0%
— Because the output port (solenoid pressure) and supply port (pilot pressure) connect in the solenoid, the
solenoid pressure supplied to the output port.
• Energized (ON) or duty 100%
— Because the output port (solenoid pressure) and the drain port connect, solenoid pressure is drained.
Normal low
• De-energized (OFF) or duty 0%
— Because the output port (solenoid pressure) and the drain port connect in the solenoid, the solenoid
pressure is drained.
• Energized (ON) or duty 100%
— Because the output port (solenoid pressure) and the supply port (pilot pressure) connect in the solenoid,
the solenoid pressure supplied to the output port.
Solenoid Type Characteristics Function
Pressure control solenoid
Repeats ON and OFF at 50
Hz (20 ms cycle); duty cycle
type (three-way type)
Normal high
Controls pressure regulator
valve, regulates line pressure
Torque converter clutch
(TCC) solenoid valve
Normal low
Controls TCC engagement
and disengagement
2-4 brake solenoid valve
Normal high
Control 2-4 brake
engagement and
disengagement
High clutch solenoid valve
Control high clutch
engagement and
disengagement
Shift solenoid A
ON/OFF (three-way type)
Normal low
Control shift valve A
Shift solenoid B Control shift valve B
Shift solenoid C Control shift valve C
Reduction timing solenoid
valve
ON/OFF (two-way type)
Control reduction reducing
valve
Neutral shift solenoid
Control neutral shift valve and
reverse inhibitor valve
AMU0517S025
AMU0517S026
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