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Home >> Saturn >> 2006 >> Vue Red Line, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 6 (Automatic Transaxle - 4T45-E - Introduction (2 Of 2)) >> Description and Operation >> Automatic Transmission Hydraulic Diagrams >> Overdrive Range, 4-3 Downshift - Torque Converter Clutch (TCC) Not Applied (W/o Electronic Range Select Mode) >> Line Pressure Increases >> Pressure Control Solenoid (PCS) Valve

Pressure Control Solenoid (PCS) Valve

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During the downshift, except for a coastdown, the PCM senses the increase in the throttle position or the engine load. When this occurs the PCM increases the PCS duty cycle. The increase in duty cycle increases the output fluid pressure from the PCS, thereby increasing the torque signal fluid pressure at the torque signal regulator valve.

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