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June 8, 2020 Service bulletin

Hybrid vehicles are equipped with two types of batteries: ?Hybrid Vehicle (HV) battery ?Auxiliary (12V)...

Toyota technical service bulletin T-SB-0040-20 Rev for 2021 Toyota Prius, 2021 Toyota Camry Hybrid and 2021 Toyota Highlander Hybrid and others.

Bulletin number
T-SB-0040-20 Rev
Component
Electrical system: 12v/24v/48v battery
Summary
TSB: 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.

Owners of these vehicles have filed 27 complaints in the electrical category.

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