K 1500 Truck 4WD V8-379 6.2L DSL VIN C FI (1992)
Torque Converter Clutch Solenoid: Description and Operation
Torque Converter Clutch Circuit
Purpose:
The Torque Converter Clutch (TCC) system uses a solenoid operated valve, in the automatic transmission, to couple the engine flywheel to the
output shaft of the transmission through the torque converter, which increases fuel economy.
Operation:
For the TCC to apply, the following conditions must be met:
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Internal transmission fluid pressure must be correct.
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The ECM completes a ground circuit, to energize a TCC apply solenoid in the transmission, which moves a check ball in a fluid line. This
allows the converter clutch to apply if the hydraulic pressure is correct.
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Throttle Position Sensor (TPS) - After the converter clutch applies, the ECM uses the information from the TPS to release the clutch, when
the vehicle is accelerating, or decelerating, at a certain rate.
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Brake Switch - This switch, in the TCC circuit, opens when the brake pedal is depressed. This de-energizes the TCC solenoid.
Location:
The TCC solenoid is located inside the transmission.