TSB: REVISION NOTICE January 15, 2020 Rev2: ? The entire bulletin has been updated. February 11, 2019 Rev1: ? The Introduction and Every Two Months sections have been updated. Any previous printed versions of this bulletin should be discarded. Hybrid vehicles are equipped with two types of batteries: ? Hybrid Vehicle (HV) battery ? Auxiliary (12V) battery If the hybrid vehicle is put into storage, the State-Of-Charge (SOC) of its HV battery and auxiliary battery will gradually decrease. To prevent the auxiliary battery from becoming discharged during storage, proper maintenance is necessary. Perform the following maintenance service for the HV battery and auxiliary battery. NOTE ? BEFORE disconnecting the auxiliary battery, confirm the shift lever is in the ?P? position and apply the parking brake completely. The shift lever CANNOT be shifted from the ?P? position with the auxiliary battery disconnected. ? If the negative (?) terminal of the auxiliary battery is reconnected, even if the vehicle is powered ON (Ready ON), the hybrid system may NOT start. In this case, depress the brake pedal and press the Power button to start the hybrid system (the Ready light is ON). If the hybrid system still does NOT start (the Ready light is OFF), refer to the Repair Manual.