Flash: Transmission Diagnostic And Shift Enhancements
This bulletin involves reprogramming the Transmission Control Module (TCM) with the latest available software.
Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find that the following Diagnostic Trouble Codes (DTCs) have been set:
· **P0887-00 - TCM Power Control Circuit High (Sales Codes ED6 and EHB).
· P061B-00 - Internal Control Module Torque Calculation Performance (Sales Codes ED6 and EHB).**
· P0711-00 - Transmission Fluid Temperature Sensor A Circuit Range-Performance.
· P072F-00 - Stuck In Gear 4.
· P076F-00 - Gear 7 shift Incorrect Ratio.
· P0810-00 - Clutch Position Control Error.
· P1CC9-00 - Unable To Engage Gear.
· P0734-00 - Gear 4 Shift Incorrect Ratio.
In addition, the following transmission shift and performance improvements are included in this software release:
· **2-1 downshift quality when using Electronic Range Shifter (ERS) mode.
· Garage shifts (Park to Reverse or Drive) (Sales Code EHB).
· Poor 3-1 downshift quality when coasting to a stop (Sales Code ED6).**
· 3-2 downshift delay while driving on inclines.
· Overall coastdown shift quality.
· Throttle response and performance feel.
· Management and prevention of busy shifting.
· Lift foot/change mind shift quality.
