Flash: Transmission Diagnostic and Shift Enhancements This bulletin involves reprogramming the...

Bulletin number

21-019-17 REV. A

Component

Power train

Summary

Flash: Transmission Diagnostic and Shift Enhancements This bulletin involves reprogramming the Transmission Control Module (TCM) withthe latest available software.A small number of customers may experience a Malfunction Indicator Lamp (MIL) illumination and/or one of the following conditions. Uponfurther investigation, a technician may find one or more of the following DTCs stored in the TCM memory.2015 KL VehiclesP1634-00 - TCM Internal Watchdog Performance(Sales Codes ED6 or ED8 Only).U1412- Implausible Vehicle Speed Signal Received. U0001- Can C Bus. P0887-00- TCM Power Control Circuit High. P061B-00- Internal Control Module Torque Calculation Performance. U0401-00- Implausible Data Received From ECM/PCM. P1DAD-00- Input Shaft-Output Shaft Direction Correlation. P0711-00- Transmission Fluid Temperature Sensor A Circuit Range-Performance(ED6 or ED8 Only). In addition, some customers may experience one or more of the following conditions:When driving on grades, the 3-2 downshift is hard to achieve or not available.Other enhancements included in this update:Garage shift improvements. Shift improvements for 2-1 shift quality when using Electronic Range Sensor(ERS) function for 2-1 downshift and 3-1 shift quality (bump) when coasting to a stop(ED6 or ED8). 2015 UF VehiclesP0887-00- TCM Power Control Circuit High.P072F-00- Stuck In Gear 4.P061B-00- Internal Control Module Torque Calculation Performance.P0711-00- Transmission Fluid Temperature Sensor A Circuit Range-Performance(ED6, ED8, EDD or EDE Only).P0885-00- TCM Power Control Circuit(ED6, ED8, EDD or EDE Only). P0975-00- Shift Solenoid B Control Circuit Performance(ED6, ED8, EDD or EDE Only).P0887-00- TCM Power Control Circuit High(ED6, ED8, EDD or EDE Only). P0978-00- Shift Solenoid 3 Control Circuit Performance(ED6, ED8, EDD orEDE Only). P0981-00- Shift Solenoid 4 Control Circuit Performance(ED6, ED8, EDD orEDE Only). P0984-00- Shift Solenoid 5 Control Circuit Performance(ED6, ED8, ED

Owners of these vehicles have filed 1,702 complaints in the transmission category.