Lexus RX 400h Hybrid 2007 Emergency Response Manual
Hybrid
2007 Model
© 2005 Toyota Motor Corporation
All rights reserved. This document may not be
altered without the written permission of Toyota Motor Corporation.
06RX 400hERG REV – (05/27/05)
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Foreword
In April 2005, Lexus released the Lexus RX 400h gasoline-electric
hybrid vehicle in North America. Except where noted in this guide,
basic vehicle systems and features for the RX 400h are the same as
those on the conventional, non-hybrid, Lexus RX 350. To educate and
assist emergency responders in the safe handling of the RX 400h hybrid
technology, Lexus published this RX 400h Emergency Response Guide.
High voltage electricity powers the electric motors, generator,
inverter/converter, and power steering. All other automotive electrical
devices such as the headlights, radio, and gauges are powered from a
separate 12-Volt battery. Numerous safeguards have been designed
into the RX 400h to help ensure the high voltage, approximately 288Volt, Nickel Metal Hydride (NiMH) Hybrid Vehicle (HV) battery pack
is kept safe and secure in an accident.
The RX 400h utilizes the following electrical systems:
• Maximum 650-Volts AC
• Nominal 288-Volts DC
• Nominal 42-Volts DC
• Nominal 12-Volts DC
RX 400h Features:
• Adoption of Hybrid Synergy Drive as the name for the Lexus
Gasoline - Electric Hybrid System.
• Hybrid Synergy Drive includes a boost converter in the inverter
assembly that boosts to 650-Volts the available volta ge t o the
electric motors.
• The high voltage hybrid vehicle battery pack rated at 288-Volts .
• A high voltage motor driven air conditioning compressor rated at
288-Volts
• A high voltage Electric Power Steering (EPS) assist motor rated at
42-Volts.
• Body electrical system rated at 12-Volts negative chassis ground.
• Both two-wheel-drive (2WD) and four-wheel-drive (4WD)
configurations are available.
• 4WD models include an additional 650-Volt electric motor to dr i ve
the rear wheels.
• Supplemental Restraint System (SRS) - dual stage frontal airbags,
driver knee airbag, front seat side airbags, curtain shield airbags,
and front seat belt pretensioners.
High voltage electrical safety is an important factor in the emergency
handling of the RX 400h Hybrid Synergy Drive system. It is important
to recognize and understand the disabling procedures and warnings
throughout the guide.
Additional topics contained in the guide include:
• Lexus RX 400h identification.
• Major Hybrid Synergy Drive component locations and descriptions.
• Extrication, fire, recovery, and additional emergency response
information.
• Roadside assistance information.
2007 Model Year RX 400h
By following the information in this guide, emergency responders
should be able to mitigate a rescue involving the Lexus RX 400h
hybrid vehicle safely.
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Table of Contents Page
About the RX 400h 1
RX 400h Identification 2
Hybrid Synergy Drive Component Locations & Descriptions 6
Hybrid Synergy Drive Operation 9
Hybrid Vehicle (HV) Battery Pack and Auxiliary Battery 10
High Voltage Safety 11
SRS Airbags & Seat Belt Pretensioners 13
Emergency Response 15
Extrication 15
Fire 18
Overhaul 19
Recovery/Recycling NiMH HV Battery Pack 19
Spills 20
First Aid 20
Submersion 21
Roadside Assistance 22
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About the RX 400h
The RX 400h is the first gasoline-electric hybrid vehicle for Lexus. The
gasoline-electric hybrid system has been named Hybrid Synergy Drive.
Hybrid Synergy Drive means that the vehicle contains a gasoline engine
and an electric motor for power. Two energy sources are stored on
board the vehicle:
1. Gasoline stored in the fuel tank for the gasoline engine.
2. Electricity stored in a high voltage Hybrid Vehicle (HV) battery
pack for the electric motor.
The result of combining these two power sources is improved fuel
economy and reduced emissions. The gasoline engine also powers an
electric generator to recharge the battery pack; unlike a pure all electric
vehicle, the RX 400h never needs to be recharged from an external
electric power source.
Depending on the driving conditions one or both sources are used to
power the vehicle. The following illustration demonstrates how the RX
400h operates in various driving modes.
On light acceleration at low speeds, the vehicle is powered by the
electric motor. The gasoline engine is shut off.
During normal driving, the vehicle is powered mainly by the
gasoline engine. The gasoline engine is also used to recharge the
battery pack.
During full acceleration, such as climbing a hill, both the gasoline
engine and the electric motor power the vehicle.
During deceleration, such as braking, the vehicle regenerates the
kinetic energy from the wheels to produce electricity that recharges
the battery pack.
While the vehicle is stopped, the gasoline engine and electric motor
are off, however the vehicle remains on and operational.
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RX 400h Identification
In appearance, the 2007 RX 400h is nearly identical to the
conventional, non-hybrid Lexus RX 350. The RX 400h is a 5-door
Luxury Utility Vehicle. Exterior, interior, and engine compartment
illustrations are provided to assist in identification.
The alphanumeric 17 character Vehicle Identification Number (VIN) is
provided in the front windshield cowl, driver door post, and under the
front passenger seat.
Example VIN:
JTJGW31U840020208 (2WD)
JTJHW31U850011201 (4WD)
An RX 400h is identified by the first 6 alphanumeric characters;
JTJGW3 (2WD) and JTJHW3 (4WD).
VIN Plate Locations
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RX 400h Identification (Continued)
Exterior
logos on the rear hatchback door.
Gasoline fuel filler door located on the driver side rear quarter panel.
Exterior Driver Side View
Exterior Front View Exterior Rear View
Exterior Rear and Driver Side View
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RX 400h Identification (Continued)
Interior
Instrument cluster (speedometer, fuel gauge, warning lights), located in
the dash behind the steering wheel, is different than the one on the
conventional, non-hybrid RX 350.
In place of a tachometer, a power meter showing kW output is used.
NOTE:
If the vehicle is off, the instrument cluster gauges will be “blacked out”,
not illuminated.
Interior View
Instrument Cluster View
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RX 400h Identification (Continued)
Engine Compartment
3.3-liter aluminum alloy gasoline engine.
High voltage inverter/converter assembly with
logos on the cover.
Engine Compartment View
Logos on Cover
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Hybrid Synergy Drive Component Locations & Descriptions
Component Location Description
12-Volt
Auxiliary
Battery
Engine
Compartment
Lead-acid battery powers all low voltage
electrical equipment.
Hybrid
Vehicle
(HV) Battery
Pack
Cabin Area,
Mounted to Cross
Member and
Under Rear Seat
288-Volt Nickel Metal Hydride (NiMH)
battery pack consisting of 30 low voltage (9.6volt) modules connected in series.
Power
Cables
Under Carriage
and Engine
Compartment
Orange colored power cables carry high
voltage Direct Current (DC) between the HV
battery pack, inverter/converter, and A/C
compressor. Also carries 3-phase Alternating
Current (AC) between inverter/converter,
motor, and generator.
Inverter/
Converter
Engine
Compartment
Boosts and inverts the high voltage electricity
from the HV battery pack to 3-phase AC
electricity that drives the electric motor. The
inverter/converter also converts AC electricity
from the electric generator and motor
(regenerative braking) to DC that recharges the
HV battery pack.
Gasoline
Engine
Engine
Compartment
Provides two functions: 1) powers vehicle; 2)
powers generator to recharge the HV battery
pack. The engine is started and stopped under
control of the vehicle computer.
Front
Electric
Motor
Engine
Compartment
3-phase high voltage AC permanent magnet
electric motor contained in the front transaxle.
Used to power the front wheels.
Electric
Generator
Engine
Compartment
3-phase high voltage AC generator contained
in the front transaxle. Used to recharge the HV
battery pack.
A/C
Compressor
Engine
Compartment
3-phase high voltage AC electrically driven
motor compressor.
Hybrid Synergy Drive Components
*:Only on models with 4WD system
Components (Top View) and High Voltage Power Cables
11
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