2016 LEXUS RX450H power

771-3. Hybrid system
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For safety and security
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◆When stopped/during start off
The gasoline engine stops* when the vehicle is stopped. During start off, the
electric motor (traction mo tor) drives the vehicle. At slow speeds or when
traveling down a gentle slope, the engi ne is stopped* and the electric motor
(traction motor) is used.
When the shift lever is in N, the hybrid battery (traction battery) is not being
charged.
*: When the hybrid battery (traction battery) requires charging or the engine is warm- ing up, etc., the gasoline engine will not automatically stop. (P. 78)
◆During normal driving
The gasoline engine is predominantly used. The electric motor (traction
motor) charges the hybrid battery (traction battery) as necessary.
◆When accelerating sharply
When the accelerator pedal is depressed heavily, the power of the hybrid bat-
tery (traction battery) is added to that of the gasoline engine via the electric
motor (traction motor).
◆When braking (regenerative braking)
The wheels operate the electric motor (traction motor) as a power generator,
and the hybrid battery (traction battery) is charged.
When the gasoline engine is off while driving, a sound is produced to warn
pedestrians, people riding bicycles or other people and vehicles in the surround-
ing area that the vehicle is approaching. The pitch of the sound varies according
to the vehicle speed. When the vehicl e speed becomes approximately 15 mph
(25 km/h) or more, the notification sound turns off.
Vehicle proximity notification system

801-3. Hybrid system
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The illustration is an example for explanation and may differ from the actual item.
*:AWD models only
Hybrid system precautions
Take care when handling the hybrid system, as it is a high voltage system
(about 650 V at maximum) as well as contains parts that become extremely
hot when the hybrid system is operating. Obey the warning labels attached to
the vehicle.
Warning label
Hybrid battery (traction battery)
Rear electric motor (traction
motor)
*
Service plug High voltage cables (orange)
Front electric motor (traction
motor)
Power control unit
Air conditioning compressor
1
2
3
4
5
6
7
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821-3. Hybrid system
RX450h_U_OM0E013U
■If a warning light comes on, a warning message is displayed, or the 12-volt battery is dis-
connected
The hybrid system may not start. In this case, try to start the system again. If the “READY”
indicator does not come on, contact your Lexus dealer.
■Running out of fuel
When the vehicle has run out of fuel and the hybrid system cannot be started, refuel the
vehicle with at least enough gasoline to make the low fuel level warning light (P. 538)
go off. If there is only a small amount of fu el, the hybrid system may not be able to start.
(The standard amount of fuel is about 2.9 gal. [11.0 L, 2.4 Imp.gal.], when the vehicle is on
a level surface. This value may vary when the vehicle is on a slope. Add extra fuel when
the vehicle is inclined.)
■Electromagnetic waves
●High voltage parts and cables on hybrid ve hicles incorporate electromagnetic shield-
ing, and therefore emit approximately the same amount of electromagnetic waves as
conventional gasoline powered vehicles or home electronic appliances.
●Your vehicle may cause sound interference in some third party-produced radio parts.
■Hybrid battery (traction battery)
The hybrid battery (traction battery) has a li mited service life. The lifespan of the hybrid
battery (traction battery) can change in acco rdance with driving style and driving condi-
tions.
WARNING
■High voltage precautions
This vehicle has high voltage DC and AC sy stems as well as a 12-volt system. DC and
AC high voltage is very dangerous and can cause severe burns and electric shock that
may result in death or serious injury.
●Never touch, disassemble, remove or replace the high voltage parts, cables or their
connectors.
●The hybrid system will become hot after starting as the system uses high voltage. Be
careful of both the high voltage and the high temperature, and always obey the warn-
ing labels attached to the vehicle.
●Never try to open the service plug accesshole located under the rear seat. The service
plug is used only when the vehicle is serviced
and is subject to high voltage.

85
1
For safety and security
RX450h_U_OM0E013U1-4. Theft deterrent system
The indicator light flashes after the
power switch has been turned off to
indicate that the system is operating.
The indicator light stops flashing after
the power switch has been turned to
ACCESSORY or ON mode to indi-
cate that the system has been canceled.
■System maintenance
The vehicle has a maintenance-fr
ee type immobilizer system.
■Conditions that may cause the system to malfunction
●If the grip portion of the key is in contact with a metallic object
●If the key is in close proximity to or touching a key registered to the security system (key
with a built-in transponder chip) of another vehicle
Immobilizer system
The vehicle’s keys have built-in transp onder chips that prevent the hybrid sys-
tem from starting if a key has not been previously registered in the vehicle’s
on-board computer.
Never leave the keys inside the vehicle when you leave the vehicle.
This system is designed to help preven t vehicle theft but does not guarantee
absolute security agai nst all vehicle thefts.

871-4. Theft deterrent system
1
For safety and security
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The alarm uses light and sound to give an alert when an intrusion is detected.
The alarm is triggered in the following situations when the alarm is set:
●A locked door is unlocked or opened in any way other than using the entry
function, wireless remote control or mech anical key. (The doors will lock again
automatically.)
●The hood is opened.
Close the doors and hood, and lock all
the doors. The system will be set auto-
matically after 30 seconds.
The indicator light changes from being
on to flashing when the system is set.
Do one of the following to de activate or stop the alarms:
●Unlock the doors.
●Turn the power switch to ACCESSORY or ON mode, or start the hybrid sys-
tem. (The alarm will be deactivated or stopped after a few seconds.)
Alarm
The alarm
Setting the alarm system
Deactivating or stopping the alarm

932. Instrument cluster
2
Instrument cluster
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Warning lights inform the driver of malfunctions in any of the vehicle’s systems.
Warning lights
*1
(U.S.A.)
Brake system warning light
( P. 536)*1
(Canada)
ABS warning light
( P. 537)
*1
(Canada)
Brake system warning light
( P. 536)*2
(U.S.A.)
Parking brake indicator
( P. 537)
*1Brake system warning light
( P. 536)*2
(Canada)
Parking brake indicator
( P. 537)
*1
(if equipped)
Charging system warning
light ( P. 536)
*1, 2
Brake hold operated
indicator ( P. 537)
*1
(U.S.A.)
Malfunction indicator lamp
( P. 536)*1Electric power steering
system warning light
( P. 537)
*1
(Canada)
Malfunction indicator lamp
( P. 536)*1Electric power steering
system warning light
( P. 537)
*1SRS warning light
( P. 536)
(if equipped)
LDA indicator ( P. 537)
LKA indicator ( P. 537)
*1
(U.S.A.)
ABS warning light
( P. 537)*1
Slip indicator ( P. 537)

942. Instrument cluster
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*1: These lights turn on when the power switch is turned to ON mode to indicate that a system check is being performe d. They will turn off after the hybrid system is on, or
after a few seconds. There may be a malfunctio n in a system if the lights do not turn on,
or turn off. Have the vehicle inspected by your Lexus dealer.
*2: The light flashes to indicate a malfunction.
The indicators inform the driver of the op erating state of the vehicle’s various sys-
tems.
*1, 2
(if equipped)
PCS warning light
(  P. 538)*1Tire pressure warning light
( P. 538)
Low fuel level warning light
(  P. 538)
*1Master warning light
( P. 538)
Seat belt reminder light
(  P. 538)
Indicators
Turn signal indicator
( P. 244) Cruise control indicator
(
 P. 311, 323, 335)
(U.S.A.)
Headlight indicator
( P. 251)
(if equipped)
Radar cruise control
indicator ( P. 311, 323)
(Canada)
Tail light indicator
( P. 251) Cruise control “SET”
indicator
(
 P. 311, 323, 335)
Headlight high beam
indicator ( P. 252)
(if equipped)
LDA indicator ( P. 302)
LKA indicator ( P. 292)
*1
(if equipped)
Automatic High Beam
indicator (P. 255)
(if equipped)
LDA indicator ( P. 302)
LKA indicator ( P. 292)
Fog light indicator
(  P. 259)
*4
(if equipped)
LDA indicator ( P. 302)
LKA indicator ( P. 292)

962. Instrument cluster
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F SPORT models
*1: These lights turn on when the power switch is turned to the ON mode to indicate that a system check is being performed. They will turn off after the hybrid system is on, or
after a few seconds. There may be a malfunction in a system if the lights do not turn on,
or turn off. Have the vehicle inspected by your Lexus dealer.
*2: In order to confirm operation, the BSM ou tside rear view mirror indicators illuminate
in the following situations:
• When the BSM function is enabled on of the multi-information display, the
power switch is turned to ON mode.
• When the power switch is in ON mode, the BSM function is enabled on of the multi-information display.
If the system is functioning correctly, the BSM outside rear view mirror indicators will
turn off after a few seconds.
If the BSM outside rear view mirror indicators do not illuminate or do not turn off,
there may be a malfunction in the system.
If this occurs, have the vehicle inspected by your Lexus dealer.
*3: This light illuminates on the outside rear view mirrors.
*4: The light flashes to indicate that the system is operating.
*5: The light comes on when the system is turned off.
*6: This light illuminates on the center panel.
*7: When the outside temperature is approximately 37 F (3 C) or lower, the indicator
will flash for approximately 10 seconds, then stay on. Eco drive mode indicator
(
 P. 377) “SPORT S” indicator
(
 P. 377)
“SPORT S+” indicator
(  P. 377) “CUSTOMIZE” indicator
(
 P. 377)
EV drive mode indicator
(  P. 237)
WARNING
■If a safety system warning light does not come on
Should a safety system light such as the ABS and SRS warning light not come on when
you start the hybrid system, this could mean that these systems are not available to help
protect you in an accident, which could result in death or serious injury. Have the vehi-
cle inspected by your Lexus dealer immediately if this occurs.