SOLENOID VALVE DESCRIPTION [JA5A-EL]

BME051719200T11

Function

Function chart

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

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.

ON/OFF type (two-way)

Normal low
• De-energized (OFF)
- The TCM does not apply an electric current to the solenoid valves. The rod moves upward by hydraulic pressure and the drain port opens.
• Energized (ON)
- The TCM applies an electric current to the solenoid valves. This excites the coil and forces the rod to move downward to retain hydraulic pressure.