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Pilot pressure generated by the operation of shift solenoid valves LOCK-UP CONTROL NBAT0180S03 The torque converter clutch piston in the torque converter is locked Conditions for Lock-up Operation NBAT0180S0301 When vehicle is driven in 4th gear position, vehicle speed and Overdrive control switch ON OFF Selector lever “D” position Gear position D 4 D 3 Vehicle speed sensor More than set value Throttle position sensor Less than set opening Closed throttle position switch OFF A/T fluid temperature sensor More than 40°C (104°F) SAT010J Torque Converter Clutch Solenoid Valve Control NBAT0180S0302 The torque converter clutch solenoid valve is controlled by the SAT011J OFF-time INCREASING " Amount of drain DECREASING " Pilot pressure HIGH " Lock-up RELEASING GI MA EM LC EC FE TF PD AX SU BR ST RS BT HA SC EL IDX OVERALL SYSTEM Control Mechanism (Cont’d) AT-29 |