Chart C-8A, Torque Converter Clutch 1.6L & 2.2L TBI T & J Bodies: Notes

Fig 1: Chart C-8A, Torque Converter Clutch Circuit (1.6L TBI T Body)

Courtesy of GENERAL MOTORS CORP.

Fig 2: Chart C-8A, Torque Converter Clutch Circuit (2.2L TBI J Body)

Courtesy of GENERAL MOTORS CORP.

Voltage is supplied to TCC solenoid through brake switch and transaxle 3rd gear apply switch. ECM will engage TCC by grounding circuit No. 422 to energize solenoid.

TCC will engage when:

• Vehicle speed is above 24 MPH.
• Engine is at normal operating temperature.
• Throttle position not changing, indication a steady speed.
• Brake switch and transmission 3rd gear switch are closed.
  NOTE: Test numbers refer to test numbers in diagnostic chart.
  1. Light off confirms transmission 3rd gear apply switch is open.
  2. At 30 MPH, transmission 3rd gear switch should open. Test light will light and confirm battery supply and closed brake switch.
  3. Grounding diagnostic terminal with ignition switch on, engine off, should turn on test light. This test checks capability of ECM to control the solenoid.