Torque Converter Clutch (TCC) Solenoid
See MISCELLANEOUS ECM CONTROLS .
Disconnect harness connector to TCC solenoid. Measure resistance between TCC solenoid terminals. (Scheme 232) Solenoid resistance should be greater than 20 ohms.
Scheme 232
Note. Some solenoids have an internal pressure switch in series with solenoid winding and will not show continuity until transmission hydraulic pressure is applied.