Flash: Diagnostic And System Enhancements
This bulletin involves reprogramming the Powertrain Control Module (PCM) with updated software.
NOTE: This bulletin contains optional software update that should only be used in situations where the customer is specifically complaining of a Drone Noise, Shudder, Pulsation, or Vibration under light throttle applications while vehicle is operating in MDS/ECO mode. There will be two separate software options displayed on the wiTECH flash tab. The software file released for this condition contains the verbiage ?OPTIONAL?.
The other file is the standard software that does not contain improvements for the Drone/Shudder concern. If for some reason the customer finds this shudder improvement objectionable, the PCM software may be returned/reflashed to the standard version. Both software versions will address the remaining conditions noted
in the bulletin.
A small number of customers may experience a surge, shudder or pulsation type sensation when driving on smooth road surfaces at highway speeds of 64-129 km/h (40-80 mph).
During normal diagnostics a technician may find one or more of the following Diagnostic Trouble Codes (DTCs) present:
? P3426 - Cylinder 4 Deactivation Control Performance.
? P3402 - Cylinder 1 Deactivation Control Performance.
? P3442 - Cylinder 6 Deactivation Control Performance.
? P3450 - Cylinder 7 Deactivation Control Performance.
? U0140 - Lost Communication With Body Control Module. (Attempting to clear this DTC will be unsuccessful).
? P030X - Cylinder X Misfire Detected.
? P0300 - Multiple Cylinder Misfire Detected.
Additionally the following enhancements have been implemented:
Improved Cruise Control Acceleration mode.
Improved Multi Displacement System operation. 6-Speed Automatic 66RFE transmission (Sales Code DFP).
Multi Displacement System function improved while in stationary mode. 6-Speed Auto Aisin AS66RC transmission (Sales Code DF3). Potential small improvement
