2008 LEXUS RX400H battery

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1-1. Hybrid system
RX400h_U
CAUTION
■Road accident cautions
Observe the following precautions to reduce the risk of injury.
●Pull your vehicle off the road, put the shift lever in P, apply the parking brake, turn
the hybrid system off and remove the key.
●Do not touch the high voltage parts, cables and connectors.
●If electric wires are exposed inside or outside your vehicle, an electric shock may
occur. Never touch exposed electric wires.
●If a fluid leak occurs, do not touch it as it may be strong alkaline electrolyte from
the hybrid battery (traction battery). If it comes into contact with your skin or
eyes, wash it off immediately with a large amount of water or if possible, boric
acid solution. Seek immediate medical attention.
●If a fire occurs in the hybrid vehicle, leave the vehicle as soon as possible. Never
use a fire extinguisher that is not meant for electric fires. Using even a small
amount of water may be dangerous.
●If your vehicle needs to be towed, do so with the front wheels (for 2WD models)
or four wheels (for AWD models) raised. If the wheels with the electric motor
(traction motor) are on the ground when towing, the motor may continue to gen-
erate electricity. This may cause an electricity leakage leading to a fire.(
→P. 3 7 8 )
■Nickel-metal hydride battery
Your vehicle contains a sealed nickel-metal hydride battery. If disposed of improp-
erly, it is hazardous to the environment and there is a risk of severe burns and elec-
trical shock that may result in death or serious injury.
■If the system activates
●Carefully check to see if there are exposed high voltage parts or cables. Never
touch the parts or cables. (
→P. 2 7 )
●Carefully inspect the ground under the vehicle. If you find that liquid has leaked
onto the ground, the fuel system may have been damaged. Leave the vehicle as
soon as possible.

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1-1. Hybrid system
1
Before driving
RX400h_U
NOTICE
■Hybrid battery air vent
●Do not put foreign objects over the air vent. The hybrid battery (traction battery)
may overheat and be damaged.
●Clean the air vent regularly to prevent the hybrid battery (traction battery) from
overheating.
●Do not wet the air vent. It may cause a short circuit and damage the hybrid bat-
tery (traction battery).
●Do not load a large amount of water such as an aquarium into the vehicle. If water
spills over the hybrid battery (traction battery), the battery may be damaged.

37
1-3. Opening, closing and locking the doors
1
Before driving
RX400h_U
■Back door operation
The back door can be opened even if it is locked. Lock the back door again when
you leave the vehicle. The back door will not lock automatically after it has been
opened and then closed.
■Operation signals
Side doors: A buzzer sounds and the emergency flashers flash to indicate that the doors have been locked/unlocked. (Locked: Once; Unlocked: Twice)
Back door: A buzzer sounds twice and the emergency flashers flash twice to indi- cate that the back door has been opened/closed.
Windows and moon roof: A buzzer sounds to indicate that the windows and moon
roof are operating.
■Door lock buzzer
If a door is not fully closed, a buzzer sounds continuously if an attempt to lock the
door is made. Fully close the door to stop the buzzer, and lock the vehicle once
more.
■Security feature
If a door is not opened within approximately 60 seconds after the vehicle is
unlocked, the anti-theft system automatically locks the vehicle again.
■Battery depletion
→ P. 3 4 8
■Customization that can be configured at Lexus dealer
Settings (e.g. door unlocking function) can be changed. (Customizable features
→P. 4 5 8 )
■Reversing the operation of the power back door
Pressing the wireless remote control switch again while the power back door is
operating will cause the operation to reverse. However, the reverse operation can-
not be performed for the first second after automatic operation starts, even if the
wireless remote control switch is pressed again.

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1-4. Adjustable components (seats, mirrors, steering wheel)
RX400h_U
■Retained accessory power
Memorized positions (except for the steering wheel positions) can be activated up
to 30 seconds after the driver's door is opened, even if the key is removed from the
engine switch.
■If any position memory button is push ed while the adjustments are being mode
The operation will stop. To reactivate the system, push the desired button (1 or 2)
again.
■If the battery is disconnected
The memorized are erased when the battery is disconnected.
CAUTION
■Seat adjustment caution
Take care during seat adjustment that the seat does not strike the rear passenger or
squeeze your body against the steering wheel.

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1-6. Refueling
RX400h_U
Closing the fuel tank capWhen replacing the fuel tank cap,
turn it until one clicking sound is
heard.
After releasing your hand, the cap
will turn slightly to the opposite
direction.
■Fuel types
Use unleaded gasoline. (91 Octane rating [Research Octane Number 96] or
higher)
■Fuel tank capacity
Approximately 17.2 gal. (65 L, 14.3 Imp. gal.)
■Open fuel filler door warning
→ P. 4 0 7
■When the fuel filler door opener is inoperable
The handle can be used to open the fuel filler
door if the fuel filler door cannot be opened
using the inside switch because the battery is
discharged or for any other reason.

86
1-7. Theft deterrent system
RX400h_U
■Items to check before locking the vehicle
To prevent unexpected triggering of the alarm and vehicle theft, make sure of the
following.
●Nobody is in the vehicle.
●The windows and moon roof are closed before the alarm is set.
●No valuables or other personal items are left in the vehicle.
■Triggering of the alarm
The alarm may be triggered in the following situations.
Stopping the alarm deactivates the alarm system.
●The doors is unlocked using the key.
●A person inside the vehicle opens a door or hood.
●The battery is recharged or replaced when the vehicle is locked.
■Pa n ic m o d eVehicles with power back door
Vehicles without power back door
When PANIC is pushed for longer than
about one second, an alarm will sound for
about 30 seconds and the vehicle lights will
flash to deter any person from trying to break
into or damage your vehicle.
To stop the alarm, push any button on the
wireless remote control.

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1-7. Theft deterrent system
1
Before driving
RX400h_U
■When the 12-volt battery is disconnected
Be sure to cancel the alarm system.
If the battery is discharged before canceling the alarm, the system may be triggered
when the battery is reconnected.
■When using the key to unlock the doors
Deactivate the alarm.
If the doors are unlocked using the key with the alarm operational, the alarm will be
triggered.

97
1-8. Safety information
1
Before driving
RX400h_U
■When to contact your Lexus dealer
In the following cases, contact your Lexus dealer as soon as possible. Do not dis-
connect the battery cables before contacting your Lexus dealer.
●Any of the SRS airbags have been inflated.
●The front of the vehicle is damaged or
deformed, or was involved in an accident
that was not severe enough to cause the
SRS airbags to inflate.
●A portion of the doors is damaged or
deformed, or the vehicle was involved in an
accident that was not severe enough to
cause the SRS side airbags and curtain
shield airbags to inflate.
●The pad section of the steering wheel, front
passenger airbag cover or lower portion of
the instrument panel is scratched, cracked,
or otherwise damaged.
●The surface of the seats with the side
airbag is scratched, cracked, or otherwise
damaged.
●The portion of the front pillars, rear pillars
or roof side rail garnishes (padding) con-
taining the curtain shield airbags inside is
scratched, cracked, or otherwise dam-
aged.