Torque Converter Clutch (TCC) Solenoid

Disconnect harness connector to TCC solenoid. Measure resistance between TCC solenoid terminals "A" and "D". See Fig 1-Fig 4 . Solenoid resistance should be greater than 20 ohms.

Fig 1: Torque Converter Clutch Schematic (2.5L)

Courtesy of GENERAL MOTORS CORP.

Fig 2: Torque Converter Clutch Schematic (3.1L)

Courtesy of GENERAL MOTORS CORP.

Fig 3: Torque Converter Clutch Schematic (4.3L Turbo PFI)

Courtesy of GENERAL MOTORS CORP.

Fig 4: Torque Converter Clutch Schematic (4.3L, 5.0L & 5.7L Under 8500 GVWR)

Courtesy of GENERAL MOTORS CORP.

NOTE: Some solenoids have an internal pressure switch in series with the solenoid winding and will not show continuity until transmission hydraulic pressure is applied. See Fig 2.