Torque Converter Clutch (TCC) Solenoid

Disconnect harness connector to TCC solenoid. Measure resistance between TCC solenoid terminals. See Fig 1 . Solenoid resistance should be greater than 20 ohms.

Fig 1: Torque Converter Clutch Schematic

Courtesy of GENERAL MOTORS CORP.

NOTE: Some solenoids have an internal pressure switch in series with solenoid winding and will not show continuity until transmission hydraulic pressure is applied.