LS430 − NEW FEATURES 19 Line Pressure Optimal Control Through the use of the solenoid valve SLT, the line pressure is optimally controlled in accordance with the engine torque information, as well as with the internal operating conditions of the torque converter and the transmission. Accordingly, the line pressure can be controlled minutely in accordance with the engine output, traveling condition, and the ATF temperature, thus realizing smooth shift characteristics and optimizing the workload in the oil pump. ECM Line Pressure Engine CPU Throttle Valve Opening Intake Air Volume Engine Coolant Temp. Engine rpm Primary Regulator Valve Transmission CPU Input Speed Sensor ATF Temp.
Shift Position Solenoid Drive Signal Fluid Pressure Current Throttle Pressure Pump Solenoid Valve SLT 232CH150 Lock-up Timing Control The ECM operates the lock-up timing control in order to improve the proper fuel consumption performance while in the top gear with the shift lever in the S4 or S5 range, and in 5th or 6th gear with the shift lever in the S6 range or D position. Lock-up Operation Gears in Each Range Large 5th Lock-up Operating Range Throttle Opening Angle 6th Lock-up Operating Range Vehicle Speed High Lock-Up Timing in D Position or S6 Range 259LSK19 *: Lock-up operation is performed when the 4th gear is hold during the AI-SHIFT control.
Position or Range Gear D, S6 S5 S4 1st x x x 2nd x x x 3rd x x x 4th *x* *x* 5th — 6th — —