2018 LEXUS RX450h warning light

531-1. For safe use
1
For safety and security
RX450h_RX450hL _U_OM48F85UExhaust gas precautions Harmful substance to the human body is contained in exhaust gases if inhaled.WARNING
Exhaust gases contain harmful carbon monoxi de (CO), which is colorless and odorless.
Observe the following precautions.
Failure to do so may cause exhaust gases enter the vehicle and may lead to an accident
caused by light-headedness, or may lead to death or a serious health hazard.■
Important points while driving ●
Keep the back door closed. ●
If you smell exhaust gases in the vehicle even when the back door is closed, open the
windows and have the vehicle inspected at your Lexus dealer as soon as possible.■
When parking ●
If the vehicle is in a poorly ventilated area or a closed area, such as a garage, stop the
hybrid system. ●
Do not leave the vehicle with the hybrid system on for a long time.
If such a situation cannot be avoided, park the vehicle in an open space and ensure
that exhaust fumes do not enter the vehicle interior. ●
Do not leave the hybrid system operating in an area with snow build-up, or where it is
snowing. If snowbanks build up around the vehicle while the hybrid system is operat-
ing, exhaust gases may collect and enter the vehicle. ■
Exhaust pipe
The exhaust system needs to be checked periodically. If there is a hole or crack caused
by corrosion, damage to a joint or abnormal exhaust noise, be sure to have the vehicle
inspected and repaired by your Lexus dealer.

60 1-2. Child safety
RX450h_RX450hL _U_OM48F85UWARNING ■
When using a child restraint system
If the head restraint interferes with the inst allation of the child restraint system, and the
head restraint can be removed, remove the head restraint.
If the head restraint cannot be remove d, raise it to the uppermost position.
●
When a booster seat is installed, always en sure that the shoulder belt is positioned
across the center of the child’s shoulder. The belt should be kept away from the child’s
neck, but not so that it coul d fall off the child’s shoulder.●
Use child restraint system suitable to the age and size of the child and install it to the
rear seat. ●
A forward-facing child restraint system may
be installed on the front passenger seat only
when it is unavoidable. When installing a for-
ward-facing child restrain t system on the front
passenger seat, raise the seatback as much as
possible, move the seat to the rearmost posi-
tion, and raise the seat to the highest position,
even if the “AIR BAG OFF” indicator light is
illuminated. ●
Do not allow the child to lean his/her head or
any part of his/her body against the door or
the area of the seat, front or rear pillars, or
roof side rails from which the SRS side air-
bags or SRS curtain shield airbags deploy
even if the child is seat ed in the child restraint
system. It is dangerous if the SRS side airbags
and curtain shield airbags inflate, and the
impact could cause death or serious injury to
the child.
●
If the driver’s seat interferes with the child
restraint system and prevents it from being
attached correctly, atta ch the child restraint
system to the right-hand rear seat. ●
Adjust the front passenger seat so that it does
not interfere with the child restraint system.

80 1-3. Hybrid system
RX450h_RX450hL _U_OM48F85U■
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. 662)
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 access
hole located under the rear seat. The service
plug is used only when the vehicle is serviced
and is subject to high voltage.

89
Instrument cluster
2
RX450h_RX450hL _U_OM48F85U 2. Instrument cluster
Warning lights and
indicators ....................................... 90
Gauges and meters ..................... 96
Multi-information display ..........101
Head-up display ............................118
Energy monitor/
consumption screen ................124

90
RX450h_RX450hL _U_OM48F85U2. 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 th e instrument cluster, center panel and
outside rear view mirrors inform the driv er of the status of the vehicle’s vari-
ous systems.
For the purpose of explanation, the following illustrations display all warning
lights and indicators illuminated.

912. Instrument cluster
2
Instrument cluster
RX450h_RX450hL _U_OM48F85UWarning lights inform the driver of malfun ctions in any of the vehicle’s systems.
Warning lights * 1
(U.S.A.)
Brake system warning light
( → P. 660) (U.S.A.)
Parking brake indicator
( → P. 661)
* 1
(Canada)
Brake system warning light
( → P. 660) (Canada)
Parking brake indicator
( → P. 661)
* 1
Brake system warning light
( → P. 660)
* 1, 2
Brake hold operated
indicator ( → P. 661)
* 1
(if equipped)
Charging system warning
light ( → P. 660) * 1
Electric power steering
system warning light
( → P. 661)
* 1
(U.S.A.)
Malfunction indicator lamp
( → P. 660) * 1
Electric power steering
system warning light
( → P. 661)
* 1
(Canada)
Malfunction indicator lamp
( → P. 660) LKA indicator ( → P. 661)
* 1
SRS warning light
( → P. 660) * 1
Slip indicator ( → P. 661)
* 1
(U.S.A.)
ABS warning light
( → P. 661) * 1, 3
PCS warning light
( → P. 662)
* 1
(Canada) ABS warning light
( → P. 661) * 1, 2
(if equipped)ICS OFF indicator
( → P. 662)

92 2. Instrument cluster
RX450h_RX450hL _U_OM48F85U* 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 ma y be a malfunction in a system if a light does not come
on, or turn off. Have the vehicl e inspected by your Lexus dealer.
* 2
: This light flashes to indicate a malfunction.
* 3
: This light flashes or illumina tes to indicate a malfunction.
* 4
: This light illuminates on the center panel.
* 5
:RX450h
* 6
:RX450hL
The indicators inform the driver of the op erating state of the vehicle’s various sys-
tems. Low fuel level warning light
( → P. 662)
* 4,6
Rear passengers’ seat
belt reminder light
( → P. 662)
Driver’s and front
passenger’s seat belt
reminder light ( → P. 662)
* 1
Tire pressure warning light
( → P. 662)
* 4, 5
Rear passengers’ seat
belt reminder light
( → P. 662)
* 1
Master warning light
( → P. 663)
Indicators Turn signal indicator
( → P. 252) Fog light indicator
( → P. 266)
(U.S.A.)
Headlight indicator
( → P. 258) Cruise control indicator
( → P. 306)
(Canada)
Tail light indicator
( → P. 258) Radar cruise control
indicator ( → P. 306)
Headlight high beam
indicator ( → P. 259) Cruise control “SET”
indicator ( → P. 306)
* 1
Automatic High Beam
indicator ( → P. 262) LKA indicator ( → P. 297)

932. Instrument cluster
2
Instrument cluster
RX450h_RX450hL _U_OM48F85U LKA indicator ( → P. 297) (U.S.A.)
Parking brake indicator
( → P. 253, 254)
* 4
LKA indicator ( → P. 297) (Canada)
Parking brake indicator
( → P. 253)(if equipped)
Intuitive parking assist
indicator ( → P. 332)
* 1
Brake hold standby
indicator ( → P. 256)
* 1, 5
(if equipped)
ICS OFF indicator
( → P. 345)
* 1
Brake hold operated
indicator ( → P. 256)
(if equipped)
“BSM” indicator ( → P. 319) EV indicator ( → P. 76)
(if equipped)
“RCTA” indicator
( → P. 319)
* 6
Security indicator
( → P. 83, 86)
* 2, 3
(if equipped)
BSM outside rear view
mirror indicators
( → P. 319) “READY” indicator
( → P. 239)
* 1, 4
Slip indicator ( → P. 384)
* 7
Low outside temperature
indicator ( → P. 96)
* 1, 5
VSC OFF indicator
( → P. 385) * 1, 6
(U.S.A.)
“AIR BAG ON/OFF”
indicator ( → P. 47)
* 1, 5
PCS warning light
( → P. 290) * 1, 6
(Canada)“AIR BAG ON/OFF”
indicator ( → P. 47)