•  The line pressure control solenoid is installed on the front valve body. Based on a signal indicating the degree to which the accelerator is open and engine torque, and according to a duty ratio predetermined in the TCM, the solenoids control line hydraulic pressure by linearly changing the comparable throttle hydraulic pressure. Through this, it controls operating hydraulic pressure to the clutch and brakes for smooth shifting. As a fail-safe function, if any line pressure control solenoid abnormality occurs, the TCM will disable the current to the line pressure control solenoid. (The line pressure is maximized, if the line pressure control solenoid current is disabled when any abnormality other than locking occurs.)