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A/T CONTROL SYSTEM AT-37 D E F G H I J K L M A B AT FUNCTION OF PRESSURE SWITCH Input clutch control valve When the input clutch is coupled, adjusts the line pressure to the optimum pressure Direct clutch control valve When the direct clutch is coupled, adjusts the line pressure to the optimum pressure TCC control valve Switches the lock-up to operating or released. Also, by executing the lock-up operation Torque converter lubrication valve Operates during lock-up to switch the torque converter, cooling, and lubrication system Cool bypass valve Allows excess oil to bypass cooler circuit without being fed into it. Line pressure relief valve Discharges excess oil from line pressure circuit. N-D accumulator Produces the stabilizing pressure for when N-D is selected. Manual valve Sends line pressure to each circuit according to the select position. The circuits to which Name Function Name Function Pressure switch 1 (FR/B) Detects any malfunction in the front brake hydraulic pressure. When it detects any mal- Pressure switch 2 (LC/B) Detects any malfunction in the low coast brake hydraulic pressure. When it detects any Pressure switch 3 (I/C) Detects any malfunction in the input clutch hydraulic pressure. When it detects any mal- Pressure switch 5 (D/C) Detects any malfunction in the direct clutch hydraulic pressure. When it detects any mal- Pressure switch 6 (H&LR/C) Detects any malfunction in the high and low reverse clutch hydraulic pressure. When it |