• The TCM stops driving the TCC solenoid (OFF) when TCC release is determined.
• When the TCM determines TCC engagement, the TCM gradually increases the duty ratio energizing the TCC solenoid, and gradually drains the oil pressure in the torque converter F chamber.
• The TCC piston slowly presses against the converter cover, and the TCC engages smoothly.
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1
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Torque converter F chamber
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2
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Torque converter pressure
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3
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Torque converter pressure (drain)
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4
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Oil cooler
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5
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TCC solenoid
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6
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Pilot pressure
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7
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TCC control valve
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• The TCC is inhibited when any of the following conditions are met.