Torque Converter Clutch Solenoid
WARNING: This page is about a different car, the 1995 Plymouth Voyager, 1995 Plymouth Grand Voyager, 1995 Dodge Grand Caravan, and 1995 Dodge Caravan. However, it is still accessible from the selected car via links, so may be relevant.
PCM controls torque converter lock-up through clutch solenoid. PCM controls lock-up according to various operating conditions.