22 LS430 − NEW FEATURES 2) Solenoid Valve SL1, SL2, SLT and SLU a. General In order to provide a hydraulic pressure that is in proportion to current that flows to the solenoid coil, the solenoid valve SL1, SL2, SLT, and SLU linearly controls the line pressure and clutch and brake engagement pressure based on the signals received from the ECM. 2 Spool Valve Solenoid Coil Sleeve Solenoid Valve SL1, SL2 Hydraulic Pressure Solenoid Coil Spool Valve Current Sleeve Solenoid Valve SL1, SL2 and SLT Solenoid Valve SLT Solenoid Coil Spool Valve Hydraulic Pressure Sleeve Solenoid Valve SLU Current Solenoid Valve SLU 259LSK16 b.
Function of Solenoid Valve SL1, SL2, SLT and SLU Solenoid Valve Function SL1 Clutch pressure control Accumulator back pressure control SL2 Brake pressure control SLT Line pressure control Accumulator back pressure control SLU Lock-up clutch pressure control