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Foreword
This guide was developed to educate and assist dismantlers in the safe handling of Lexus IS300h
gasoline-electric hybrid vehicles. IS300h 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
IS300h, as they may not be familiar to dismantlers.
High voltage electricity powers the A/C compressor, electric motor, generator, and
inverter/converter. All other conventional automotive electrical devices such as the head lights,
radio, and gauges are powered from a separate 12 Volt auxiliary battery. Numerous safeguards
have been designed into the IS300h to help ensure the high voltage, approximately 230.4 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 IS300h identification.
• Major hybrid component locations and descriptions.
By following the information in this guide, dismantlers will be able to handle IS300h
hybrid-electric vehicles as safely as the dismantling of a conventional gasoline engine automobile.
©2013 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.
