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
