Flash: Diagnostic And System Improvements
This bulletin involves updating the Body Control Module (BCM), Powertrain Control Module
(PCM), Transmission Control Module (TCM) with the latest available software. All three
modules must be updated in this service action.
Lamp (MIL)
illumination. Upon further investigation the technician may find one or more of the following
Diagnostic Trouble Codes (DTCs):
· P0711 - Transmission Fluid Temperature Sensor A Circuit Range-Performance.
· P1CC9 - Unable to Engage Gear.
· P1D98 - Incorrect Gear Ratio Clutch B or D Defective.
· P1DAD - Input Shaft-Output Shaft Direction Correlation.
· U1424 - Implausible Engine Torque Signal Received.
In addition, the customer may also experience one or more of the following transmission
related conditions:
· Garage Shifts (Shifting from Park or Neutral into Drive or Reverse).
· Harsh 1-2 upshifts.
· Less than desired accelerator pedal response in Sport and Traction Plus modes.
· RPM flare at engine start.
· Less than desired idle performance when shifting into DRIVE or REVERSE following
a cold start.
The following enhancements are included in the software update:
· Vehicle performance enhancements.
· Improve transmission shift enhancements for sand and snow mode.
· Improved paddle shifter operation.
Body Control Module (BCM)
A customer may describe that the remote key is not recognized and doesn't open/close
door locks.
In some cases the engine may not start due to the fact that a valid key is not recognized.
Upon further investigation the technician may find the Diagnostic Trouble Codes (DTCs):
· B105A-64 - Doors Lock All-Signal Plausibility Failure.
· B105D-64 - Doors Deadlock Or Unlock Driver-Signal Plausibility Failure.
