Toyota Automatic Transmission Flex Lock-up Operation Gears Chart (D, S5, S4)

This manual page explains the flex lock-up operation of an automatic transmission's torque converter clutch. On the left, a graph plots throttle opening angle (vertical axis, increasing to "Large") against vehicle speed (horizontal axis, increasing to "High"), showing three shaded operating zones: the full Lock-up Operating Range, the Flex Lock-up Operating Range during acceleration, and the Flex Lock-up Operating Range during deceleration. On the right, a table titled "Flex Lock-up Operation Gears in Each Range" lists, for shift positions D/S5 and S4, which gears permit flex lock-up under acceleration and deceleration. In D and S5: 1st and 2nd gears do not allow flex lock-up in either mode; 3rd allows acceleration flex lock-up only; 4th and 5th allow both acceleration and deceleration flex lock-up. In S4: 1st and 2nd allow neither; 3rd allows acceleration flex lock-up only; 4th allows deceleration flex lock-up only. A legend defines × as Off and ○ as Operates. Reference codes 04E0CH122C and 0140CH141C appear on the page. The document lets a reader determine exactly which gear/range combinations engage the flexible (partial) torque converter lock-up feature and under what driving conditions (throttle vs. speed) it operates.