21-039-15 REV B

Flash: Transmission Shift And Drivability Enhancements This bulletin involves reprogramming the Transmission Control Module (TCM) with the latest available software. A small number of customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more of the following Diagnostic Trouble Codes (DTCs). ? P1720 - Output Speed Sensor-Wheel Speed Rationality. ? P1634 - Output Speed Sensor-Wheel Speed Rationality. ? P1DCCD - TCM Monitoring Processor Performance Multiple Clutches Locked Up. ? P0887 - TCM Power Control Circuit High. ? P0711 - Transmission Fluid Temperature Sensor A Circuit Range-Performance. ? P1DAD - Input Shaft-Output Shaft Direction Correlation. ? P1CC9 - Unable To Engage Gear. In addition to the above conditions, this software release also includes improvements to: ? Transmission shift quality. ? Enable the capability to capture non Diagnostic Trouble Code (DTC) control module data through the Uconnect Data Recording system.