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TM-28 < SYSTEM DESCRIPTION > A/T CONTROL SYSTEM *1: Full phase real-time feedback control monitors movement of gear ratio at gear change, and controls oil pressure at real-time to achieve the best gear ratio. Lock-up Control INFOID:0000000006159235 The torque converter clutch piston in the torque converter is engaged to eliminate torque converter slip to increase power transmission efficiency. The torque converter clutch control valve operation is controlled by the torque converter clutch solenoid valve, which is controlled by a signal from TCM, and the torque converter clutch control valve engages or releases the torque converter clutch piston. Lock-up Operation Condition Table (Floor Shift Models) Lock-up Operation Condition Table (Column Shift Models) TORQUE CONVERTER CLUTCH CONTROL VALVE CONTROL Lock-up Control System Diagram Lock-up Released • In the lock-up released state, the torque converter clutch control valve is set into the unlocked state by the torque converter clutch solenoid and the lock-up apply pressure is drained. In this way, the torque converter clutch piston is not coupled. PCIA0013E Select lever D position 4 position 3 position 2 position Gear position 5 4 3 4 3 2 Lock-up × × × × – – Slip lock-up – – × – – – Select lever D position M position Gear position 5 4 3 5 4 3 2 Lock-up × × × × × – – Slip lock-up – – × – – – – PCIA0014E |