TSB: SOME 2013 – 2015 MODEL YEAR LEXUS ES, GS, AND IS VEHICLES MAY EXHIBIT AN INTERMITTENT DISCHARGED BATTERY OCCURRING WITH NO APPARENT SOURCE OF DISCHARGE FOUND. ONE POSSIBLE CAUSE MAY BE THE NETWORK GATEWAY COMPUTER NOT PROPERLY GOING INTO SLEEP MODE AT KEY OFF. THIS CAN RESULT IN EXCESSIVE PARASITIC DRAW AND A DISCHARGED BATTERY CONDITION. FOLLOW THE PROCEDURE IN THIS BULLETIN TO IDENTIFY AND ADDRESS THIS CONDITION.
