Cutlass Ciera Cruiser V6-3100 3.1L MFI VIN M (1994)
Torque Converter Clutch Solenoid: Description and Operation
Torque Converter Control (TCC) Circuit
Purpose:
The Torque Converter Clutch (TCC) solenoid eliminates the power loss of the torque converter stage when the vehicle is in a cruise mode.
Operation:
The TCC system uses a solenoid operated valve to couple the engine flywheel to the output shaft of the transmission through the torque converter.
This reduces the slippage losses in the converter, which increases fuel economy. For the converter clutch to apply, at least two conditions must be
met.
^ Internal transmission fluid pressure must be correct.
^ The PCM completes a ground circuit to energize the TCC solenoid in the transmission, which moves a check ball in the fluid line and allows
the converter clutch to apply.
The PCM controls the TCC apply solenoid by looking at several sensors.
^ Engine must be in closed loop operation.
^ Vehicle Speed Sensor (VSS). Speed must be above a certain value before the clutch can apply.
