OUTLINE OF OPERATION [FS5A-EL]

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• The operation of the electronic automatic transaxle is classified into three systems: the electronic control mechanism, the hydraulic pressure control mechanism, and the powertrain mechanism (includes the torque converter mechanism). The operation of each system is as follows:

― Electronic control mechanism

• According to the signals from the switches and sensors in the input system, the TCM outputs the signal which matches the present driving condition to the linear type solenoid, ON/OFF type solenoids and the duty-cycle type solenoids in the hydraulic pressure control mechanism.

― Hydraulic pressure control mechanism

• According to the signals from the TCM, each solenoid operates to switch the hydraulic passages in the control valve body and controls the clutch engagement pressure.

• The line pressure is adjusted by the linear type pressure control solenoid A and duty-cycle type pressure control solenoid B. The hydraulic passages are switched by the ON/OFF type solenoids (shift solenoids D and E.) And the clutch engagement pressure is controlled by the duty-cycle type solenoids (shift solenoids A, B, and C) and ON/OFF type solenoid (shift solenoids F).

― Powertrain mechanism

• The driving force from the engine is transmitted through the torque converter to the transaxle.

• Shift solenoid A, B, and C (duty-cycle type), pressure control solenoid B (duty-cycle type), shift solenoid F (ON/OFF type), or clutch engagement pressure control by the control valve enable the transmitted input driving force to be converted to optimum output driving force via the differential.

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