TSB: ECM UPGRADE - STEERING LOGIC IMPROVEMENT - THIS BULLETIN PROVIDES INFORMATION RELATED TO THE MDPS ECU SOFTWARE UPGRADE FOR SOME 2011 ~ 2014MY OPTIMA (TF/QF) VEHICLES, PRODUCED FROM JOB #1 THROUGH JULY 27, 2014, WHICH MAY EXPERIENCE A NOTCHY FEEL IN THE STEERING WHEEL. TO CORRECT THIS CONDITION, THE VEHICLE SHOULD BE EVALUATED USING THE MDPS EFFORT MEASUREMENT S/W, DETAILED IN THE ATTACHED REPAIR PROCEDURE, TO DETERMINE WHETHER AN IMPROVED STEERING LOGIC SHOULD BE INSTALLED IN THE MDPS ECU, OR IF AN MDPS COLUMN REPLACEMENT IS REQUIRED. TO DETERMINE WHETHER THE UPDATED MDPS ECU REFLASH APPLIES TO A VEHICLE YOU ARE WORKING ON, OR WHETHER IT HAS ALREADY BEEN PERFORMED, VERIFY ROM ID USING THE TABLES IN THIS TSB.
