Lexus GS 450h 2006 Dismantling Manual page 2

Foreword
This guide was developed to educate and assist dismantlers in the safe handling of the Lexus GS450h
gasoline-electric hybrid vehicle. GS450h dismantling procedures are similar to other 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 GS450h, as they may not be
familiar to dismantlers.
High voltage electricity powers an electric motor, generator, electric inverter compressor (for air
conditioner) and inverter. All other conventional automotive electrical devices such as the headlights,
radio, power steering, and gauges are powered from a separate 12 Volt battery. Numerous safeguards
have been designed into the GS450h to help ensure the high voltage, approximately 288 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
laptop computers, cell phones, 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 GS450h identification.
•
Major hybrid component locations and descriptions.
By following the information in this guide, dismantlers will be able to handle the GS450h
hybrid-electric vehicle as safely as the dismantling of a conventional gasoline engine automobile.
© 2006 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