2018 LEXUS RX450h lock

791-3. Hybrid system
1
For safety and security
RX450h_RX450hL _U_OM48F85UThe 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.
* : RX450h
When a certain level of impact is detect ed 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 wh en 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. 667)Hybrid battery (traction battery) air intake/discharge vents Air intake vents
Air discharge vents
*Emergency shut off system
Hybrid warning message

82 1-3. Hybrid system
RX450h_RX450hL _U_OM48F85UNOTICE ■
Hybrid battery (traction battery) air intake/discharge vents ●
Do not place objects that will block the air intake vents. The hybr id battery (traction
battery) may overheat and be damaged. ●
Clean the air intake/discharge vents regularl y to prevent the hybrid battery (traction
battery) from overheating.●
Do not get water or foreign materials in either the air intake/discharge vents as this
may cause a short circuit and damage the hybrid battery (traction battery). ●
Do not carry large amounts of water such as water cooler bottles in the vehicle. If
water spills onto the hybrid battery (tract ion battery), the battery may be damaged.
Have the vehicle inspected by your Lexus dealer.

86 1-4. Theft deterrent system
RX450h_RX450hL _U_OM48F85UThe 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

871-4. Theft deterrent system
1
For safety and security
RX450h_RX450hL _U_OM48F85U■
System maintenance
The vehicle has a maintenance-free type alarm system. ■
Items to check before locking the vehicle
To prevent unexpected triggering of the alarm and vehicle theft, make sure of the follow-
ing: ●
Nobody is in the vehicle. ●
The windows and moon roof or panoramic mo on 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.)
■
Alarm-operated door lock
In the following cases, depending on the si tuation, the door may automatically lock to
prevent improper entry into the vehicle: ●
When a person remaining in the vehicle un locks the door and the alarm is activated.●
While the alarm is activated, a person re maining in the vehicl e unlocks the door.●
When recharging or replacing the 12-volt battery ●
A person inside the vehicle opens a door or
hood, or unlocks the vehicle.
●
The 12-volt battery is recharged or replaced
when the vehicle is locked. ( → P. 698)
NOTICE ■
To ensure the system operates correctly
Do not modify or remove the system. If mo dified or removed, the proper operation of
the system cannot be guaranteed.

972. Instrument cluster
2
Instrument cluster
RX450h_RX450hL _U_OM48F85UEngine coolant temperature gauge Displays the engine coolant temperature
Hybrid System Indicator Displays hybrid system power ou tput or regeneration level ( → P. 99)
This display changes to a tachometer depending on the drive mode, and can be set
to show the tachometer in any driv e mode on the settings display. ( → P. 108)
Outside temperature Displays the outside temperature within the range of -40°F (-40°C) to 122°F
(50°C). Low outside temperature indicator comes on when the ambient tempera-
ture is 37°F (3°C) or lower.
Multi-information display Presents the driver with a variety of vehicle data ( → P. 101)
Displays warning messages in case of a malfunction ( → P. 667)
Clock Vehicles with a navigation system:
Time displayed is linked to the analog clock on the instrument panel. ( → P. 548)
Vehicles with a Lexus Display Audio system:
Time displayed on the clock can be adju sted on of the mu lti-information dis-
play. ( → P. 108)
Speedometer
Fuel gauge
Shift position display ( → P. 246)
Odometer and trip meter ( → P. 115)1
2
3
4
5
6
7
8
9

100 2. Instrument cluster
RX450h_RX450hL _U_OM48F85U■
Tachometer
Hybrid System Indicator switches to the tachometer when driving mode is in sport mode.
The settings of the tachometer display can be changed on of the multi-information
display. ( → P. 108)■
Engine speed
On hybrid vehicles, engine speed is precisel y controlled in order to help improve fuel
efficiency and reduce exhaust emissions etc.
There are times when the engine speed that is displayed may differ even when vehicle
operation and driving conditions are the same. ■
Brightness of the meters (d ay mode and night mode)
The brightness of the meters is changed between day mode and night mode. ●
Day mode: When the tail lights are off or when the tail lights are on but the surrounding
area is bright ●
Night mode: When the tail lights are on and the surrounding area is dark ■
Outside temperature display ●
In the following situations, the correct outside temperature may not be displayed, or the
display may take longer than normal to change:
• When stopped, or driving at low speeds (less than 12 mph [20 km/h])
• When the outside temperature has changed suddenly (at the entrance/exit of a
garage, tunnel, etc.) ●
When “ − − ” or “E” is displayed, the sy stem may be malfunctioning.
Take your vehicle to your Lexus dealer. ■
Clock settings screen (vehicles with a navigation system only)
If the clock adjustment screen is displayed continuously wh en attempting to change the
clock settings, the system may be malfunctioning.
Have the vehicle inspected by your Lexus dealer. ■
Customization
Some functions can be customized. ( → P. 108)
NOTICE ■
To prevent damage to the engine and its components●
Do not let the indicator needle of the tachometer enter the red zone, which indicates
the maximum engine speed. ●
The engine may be overheating if the engine coolant temperature gauge is in the red
zone (H). In this case, immediately stop the vehicle in a safe place, and check the
engine after it has cooled completely. ( → P. 702)

1012. Instrument cluster
2
Instrument cluster
RX450h_RX450hL _U_OM48F85UThe multi-information display presents the driver with a variety of driving-related
data, such as the current outside temperature. The multi-information display can
also be used to change the display settings and other settings. 
Except F SPORT models
Menu icon display area Displays the following items.
When a menu icon is not selected, the outside temperature and clock are displayed.
•Menu icons ( → P. 104)
• Outside temperature ( → P. 96)
•Clock ( → P. 96)
Content display area A variety of information can be displayed by selecting a menu icon. Additionally,
warning or suggestion/advice pop-up displa ys will be displayed in some situations.
• Menu icon content ( → P. 104)
• Suggestion function ( → P. 116)
• Warning message ( → P. 702)
Indicator/shift position display area Displays the following items:
•Indicators ( → P. 90)
• Shift position display ( → P. 246)Multi-information display Summary of functions
1
2
3

102 2. Instrument cluster
RX450h_RX450hL _U_OM48F85UOdometer/trip meter display area ( → P. 115)Displays the following items:
• Odometer/trip meter
• Distance until next engine oil change
Meter control switches ( → P. 103)
“ODO/TRIP” switch ( → P. 104)
F SPORT models
Outside temperature ( → P. 96)
Menu icons ( → P. 104)
Content display area A variety of information can be displayed by selecting a menu icon. Additionally,
warning or suggestion/advice pop-up displa ys will be displayed in some situations.
• Menu icon content ( → P. 104)
• Suggestion function ( → P. 116)
• Warning message ( → P. 702)
Indicators/clock •Indicators ( → P. 90)
•Clock ( → P. 96)
Shift position display ( → P. 246)
Odometer/trip meter display area ( → P. 115)Displays the following items:
• Odometer/trip meter
• Distance until next engine oil change
Meter control switches ( → P. 103)
“ODO/TRIP” switch ( → P. 104)4
5
6
1
2
3
4
5
6
7
8