Functional Check Procedure.

1. Set up the TECH 1 or other scan tool in order to read the engine.
2. Operate the vehicle until you have reached the proper operating temperature.
3. Drive the vehicle at 80 to 88 km/in (50 to 55 mph) with a light throttle (road load).
4. Maintaining throttle speed, lightly touch the brake pedal. Check for the release of the TCC and a slight increase in engine speed.
5. Release the brake and slowly accelerate. Check for a reapply of the converter clutch and a slight decrease in engine speed.
6. To properly diagnose the Torque Converter Clutch (TCC) system, first perform all electrical testing and then test the hydraulic system.
^ For diagnosis of the TCC hydraulic controls, refer to the Fluid Flow and Circuit Descriptions, and the Wiring Diagrams. Description and Operation
^ Refer to the DTC tables.