rear LEXUS RX450H 2016 Service Manual

76
RX450h_U_OM0E013U1-3. Hybrid system
The illustration is an example for explan
ation and may differ from the actual item.
Gasoline engine
Front electric motor (traction motor)
Rear electric motor (traction motor)
*
*
:AWD models only
Hybrid system features
Your vehicle is a hybrid vehicle. It has characteristics different from conven-
tional vehicles. Be sure you are closely familiar with the characteristics of your
vehicle, and operate it with care.
The hybrid system combines the use of a gasoline engine and an electric
motor (traction motor) according to driving conditions, improving fuel effi-
ciency and reducing exhaust emissions.
1
2
3

791-3. Hybrid system
1
For safety and security
RX450h_U_OM0E013U
■Sounds and vibrations specific to a hybrid vehicle
There may be no engine sound or vibration even though the vehicle is able to move with
the “READY” indicator is illuminated. For safety, make sure to shift the shift lever to P and
apply the parking brake when parked.
The following sounds or vibrations may occu r when the hybrid system is operating and
are not a malfunction:
●Motor sounds may be heard from the engine compartment.
●Sounds may be heard from the hybrid battery (traction battery) behind the rear seats
when the hybrid system starts or stops.
●Relay operating sounds such as a snap or so ft clank will be emitted from the hybrid bat-
tery (traction battery), behind the rear se ats, when the hybrid system is started or
stopped.
●Sounds from the hybrid system may be heard when the back door is open.
●Sounds may be heard from the transmission wh en the gasoline engine starts or stops,
when driving at low spee ds, or during idling.
●Engine sounds may be heard when accelerating sharply.
●Sounds may be heard due to regenerative braking when the brake pedal is depressed
or as the accelerator pedal is released.
●Vibration may be felt when the ga soline engine starts or stops.
●Cooling fan sounds may be heard from th e air intake vents under the rear seats.
■Vehicle proximity notification system
In the following cases, the vehicle proximity notification system may be difficult for sur-
rounding people to hear.
●In very noisy areas
●In the wind or the rain
Also, as the vehicle proximity notification system is installed on the front of the vehicle, it
may be more difficult to hear from the re ar of the vehicle compared to the front.
■Maintenance, repair, recycling, and disposal
Contact your Lexus dealer regarding mainte nance, repair, recycling and disposal. Do
not dispose of the vehicle yourself.
■Customization
Some functions can be customized. ( P. 607)

801-3. Hybrid system
RX450h_U_OM0E013U
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
8

811-3. Hybrid system
1
For safety and security
RX450h_U_OM0E013U
The air intake/discharge vents for the
hybrid battery (traction battery) are
located under the rear seats and in lug-
gage compartment respectively. If the
air intake vents are blocked, it could
lead to a reduction in hybrid battery
(traction battery) output.
When a certain level of impact is detected by the impact sensor, the emergency
shut off system blocks the high voltage current and stops the fuel pump to mini-
mize the risk of electrocution and fuel leakage. If the emergency shut off system
activates, your vehicle will not restart. To restart the hybrid system, contact your
Lexus dealer.
A message is automatically displayed when a malfunction occurs in the hybrid
system or an improper operation is attempted.
If a warning message is shown on the
multi-information display, read the
message and follow the instructions.
( P. 543)
Hybrid battery (traction battery) air intake/discharge vents
Air intake vents
Air discharge vents
Emergency shut off system
Hybrid warning message

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.

92
RX450h_U_OM0E013U2. Instrument cluster
Except F SPORT models
F SPORT models
The units used on the meter and some indicators may differ depending on the target
region.
Warning lights and indicators
The warning lights and indicators on the instrument cluster, center panel and
outside rear view mirrors inform the driver of the status of the vehicle’s vari-
ous systems.
For the purpose of explanation, the following illustration displays all warning
lights and indicators illuminated.

952. Instrument cluster
2
Instrument cluster
RX450h_U_OM0E013U
●Drive mode indicators
Except F SPORT modelsIntuitive parking assist
indicator (
P. 339)
(Canada)
Parking brake indicator
( P. 245)
“BSM” indicator ( P. 363)
*1Brake hold standby
indicator ( P. 249)
“RCTA” indicator
(  P. 363)
*1Brake hold operated
indicator ( P. 249)
*2, 3
BSM outside rear view
mirror indicators ( P. 363) EV indicator (
P. 78)
*1, 4
Slip indicator ( P. 383)*6
Security indicator
( P. 85, 87)
*1, 5VSC OFF indicator
( P. 384) “READY” indicator
(
 P. 232)
*1, 5
(if equipped)
PCS warning light
( P. 283)*7
Low outside temperature
indicator ( P. 97)
(U.S.A.)
Parking brake indicator
( P. 245, 246)*1, 6“AIR BAG ON/OFF”
indicator ( P. 51)
Eco drive mode indicator
( P. 377) “SPORT” indicator
(
 P. 377)
EV drive mode indicator
(  P. 237)

962. Instrument cluster
RX450h_U_OM0E013U
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.

1082. Instrument cluster
RX450h_U_OM0E013U
■G-force (if equipped)
Displays lateral G-forces on the vehicle.
Also displays, around the periphery of the G-force display, the left and right
steering amount, accelerator pedal input, and brake fluid pressure.
Acceleration G-force on the
vehicle
Current G-force value (analyzed
value of front/rear and left/right
G-forces)
Record of the maximum G-forces
Accelerator pedal input
Brake fluid pressure
Steering amount
This display is intended for use as a guideline. Depending on factors such as the
road surface condition, temperature and vehicle speed, the display may not show
the actual condition of the vehicle.
●Resetting the record of maximum G-forces
Press and hold to reset the record.
●Peak hold function
If lateral G-forces of 0.5 G or grea ter are generated, the G-force value
display will turn yellow and be held for 2 seconds.
■Tire pressure
 P. 488
■Units (if equipped)
The units of measure used can be changed while driving.
Unlike the units setting performed on , the units setting performed on can
be changed while driving.
■Blank (No items)
Displays no drive information contents.
1
2
3
4
5
6

1102. Instrument cluster
RX450h_U_OM0E013U
■ PCS (Pre-Collision Sy stem) (if equipped) (P. 279)
The following pre-collision syst em settings can be changed:
■ BSM (Blind Spot Monitor) (P. 363)
The following Blind Spot Monitor settings can be changed:
*: The Rear Cross Traffic Alert function can be enabled/disabled only when the Blind Spot Monitor function is enabled.
■ Intuitive parking assist ( P. 339)
ItemSettingsDetails
PCS On
Select to enable/disable the pre-colli-
sion system.
Off
Warning sensitivitySelect to change the warning timing.
ItemSettingsDetails
BSM On
Select to enable/disable the Blind
Spot Monitor function.
Off
RCTA*OnSelect to enable/disable the Rear
Cross Traffic Alert function.
Off
ItemSettingsDetails
Intuitive parking assist On
Select to enable/disable the intuitive
parking assist.
Off