The control solenoid (w/body and TCM) valve assembly cleaning procedure is a specific software based routine, which resides in the TCM. This procedure is activated by the scan tool and is used to cycle the solenoids and valves in the control solenoid valve assembly in an attempt to dislodge debris and free up the valves after a performance diagnostic trouble code (DTC) has set. The transmission fluid is drained and refilled with new fluid, and then the cleaning procedure is performed. When the cleaning procedure is completed, the DTC enable criteria is run again, and retested to see if the DTC concern has been corrected.
Important: The fluid pan must be removed in order to drain the fluid.