SELECT CONTROL: System Description: Description

When shifting between "N" ("P") →"D" ("R"), optimize the operating pressure on the basis of the throttle position, the engine speed, and the secondary pulley (output) revolution speed to lessen the shift shock.
Since the transaxle does not adopt the accumulator which absorbs the clutch engaging pressure when the clutch is engaged, the clutch engaging pressure is adjusted by the select control valve instead.
While the selector lever is in "P" or in "N", the TCM operates the lock-up select solenoid valve and transmits the signal pressure to the select switch valve. By this signal pressure, the select switch valve switches the oil passage so that the signal pressure from the torque converter clutch solenoid valve is transmitted to the select control valve.
When selector lever is shifted from "N" ("P") to "D" ("R"), the TCM operates the torque converter clutch solenoid valve for several seconds and transmits the signal pressure to the select control valve.
The select control valve adjusts the clutch pressure that is applied to the forward clutch and the reverse brake, according to the signal pressure from the torque converter clutch solenoid valve, so that engagement shock is absorbed.
When CVT fluid temperature is low, it takes time for oil pressure to be applied. This may cause a delay in clutch engagement.
Oil pressure becomes higher than of normal select control for eraser clutch engagement. This may cause larger impact during the clutch engagement.