Solenoid Valves Sl Sl Sl Sl Slu and SLT

In order to provide a hydraulic pressure that is proportional to the current that flows to the solenoid coil, solenoid valves SL1, SL2, SL3, SL4, SLU and SLT linearly control the line pressure and clutch and brake engagement pressure based on the signals from the ECT ECU.

Solenoid valves SL1, SL2, SL3 and SL4 are large flow linear solenoid valves that can supply more pressure than conventional ones. These solenoid valves control engagement elements by directly regulating the line pressure without using the pressure regulation valve (control valve) or the pressure reduction valve (solenoid modulator valve). Thus, the number of valves and the length of the valve body fluid passage have been reduced, the shifting response has been increased and the shift shock has been minimized.

Solenoid Valve SL1, SL2, SL3, SL4

Clutch or Brake

Control Pressure

Pressure Reduction Valve (Solenoid Modulator Valve)

Line Pressure



Pressure Valve

Regulation Valve (Control Valve)

Signal Pressure


Clutch or Brake


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  • ryan
    How to clean 2007 camry pressure control solenoid A SL1?
    1 year ago
  • Orlando
    What does slt valve on a343f toyo trans do?
    3 months ago

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