Lexus HS 250h Vehicle Dismantling Manual page 2

Foreword
This guide was developed to educate and assist dismantlers in the safe handling of Lexus HS250h
gasoline-electric hybrid vehicles. HS250h dismantling procedures are similar to other non-hybrid
Lexus vehicles with the exception of the high voltage electrical system. It is important to recognize
and understand the high voltage electrical system features and specifications of the Lexus HS250h, as
they may not be familiar to dismantlers.
High voltage electricity powers the A/C compressor, electric motors, generator, and inverter/converter.
All other conventional automotive electrical devices such as the headlights, radio, and gauges are
powered from a separate 12 Volt auxiliary battery. Numerous safeguards have been designed into the
HS250h to help ensure the high voltage, approximately 244.8 Volt, Nickel Metal Hydride (NiMH)
Hybrid Vehicle (HV) battery pack is kept safe and secure in an accident.
The NiMH HV battery pack contains sealed batteries that are similar to rechargeable batteries used in
some battery operated power tools and other consumer products. The electrolyte is absorbed in the cell
plates and will not normally leak out even if the battery is cracked. In the unlikely event the electrolyte
does leak, it can be easily neutralized with a dilute boric acid solution or vinegar.
High voltage cables, identifiable by orange insulation and connectors, are isolated from the metal chassis
of the vehicle.
Additional topics contained in the guide include:
•
Lexus HS250h identification.
•
Major hybrid component locations and descriptions.
By following the information in this guide, dismantlers will be able to handle HS250h-electric vehicles
as safely as the dismantling of a conventional non-hybrid automobile.
© 2009 Toyota Motor Corporation
All rights reserved. This book may not be reproduced or
copied, in whole or in part, without the written permission
of Toyota Motor Corporation.
ii