THIS BULLETIN PROVIDES A SERVICE PROCEDURE TO REPROGRAM THE ECM ON CERTAIN 2013-2014 MODEL
YEAR CADILLAC ATS VEHICLES, EQUIPPED WITH A 6-SPEED MANUAL TRANSMISSION (M3L). THESE VEHICLES HAVE SOFTWARE THAT PROTECTS THE ENGINE DUAL-MASS FLYWHEEL. WHILE DECELERATING AND COMING TO A STOP, THE SOFTWARE MAY SUSPEND ENGINE OPERATION IF THE CUSTOMER FAILS TO DECLUTCH OR SHIFT INTO NEUTRAL AS THE VEHICLE SLOWS, FORCING THE ENGINE RPM WELL BELOW NORMAL IDLE SPEEDS.
THIS WILL OCCUR WITHOUT DRIVELINE VIBRATION OR NOISE TO PROVIDE INDICATION TO THE CUSTOMER, WHO MAY
COMPLAIN OF AN UNEXPECTED STALL WHILE COMING TO A STOP. THE NEW CALIBRATION HAS A REVISED DMF
PROTECTION ALGORITHM THAT WILL ALLOW LOWER ENGINE SPEEDS AND ADDITIONAL DRIVER FEEDBACK TO DECLUTCH OR SHIFT INTO NEUTRAL, BEFORE INTERVENTION OCCURS.
