remote start LEXUS RX450H 2020 Owner's Manual

6898-2. Steps to take in an emergency
8
When trouble arises
RX350/RX350L_U
■Starting the engine when the battery is discharged
The engine cannot be started by push-starting.
■To prevent battery discharge
●Turn off the headlights and the audio system while the engine is off.
●Turn off any unnecessary electrical components when the vehicle is running at a low
speed for an extended period, such as in heavy traffic.
■When removing the battery terminals
When the battery terminals are removed, the information stored in the ECU is cleared.
Before removing the battery termin als, contact your Lexus dealer.
■Charging the battery
The electricity stored in the battery will disc harge gradually even when the vehicle is not
in use, due to natural discharge and the draini ng effects of certain electrical appliances. If
the vehicle is left for a long time, the battery may discharge, and the engine may be
unable to start. (The battery recharges automatically during driving.)
■When the battery is removed or discharged
●In some cases, it may not be possible to un lock the doors using the smart access system
with push-button start when the battery is discharged. Use the wireless remote control
or the mechanical key to lock or unlock the doors.
●The engine may not start on the first attempt after the battery has recharged but will
start normally after the second attempt. This is not a malfunction.
●The engine switch mode is memorized by the vehicle. When the battery is recon-
nected, the system will return to the mode it was in before the battery was discharged.
Before disconnecting the battery, turn the engine switch off.
If you are unsure what mode the engine switch was in before the battery discharged, be
especially careful when reconnecting the battery.
●The power back door must be initialized. ( P. 138)
■When replacing the battery
●Use a battery with the same case size as the previous battery and an equivalent 20
hour rate capacity (20HR) or greater.
• If the sizes differ, the battery cannot be properly secured.
• If the 20 hour rate capacity is low, even if the time period where the vehicle is not used is a short time, the battery may discharge and the engine may not be able to
start.
●For details, consult your Lexus dealer.

7269-2. Customization
RX350/RX350L_U
■Smart access system with push-button start and wireless remote control
(  P. 124, 146)
■Smart access system with push-button start ( P. 124, 146)
FunctionDefault settingCustomized setting
Operation buzzer volume5OffOO1 to 7
Operation signal
(Emergency flashers)OnOffOO
Time elapsed before automatic
door lock function is activated if
door is not opened after being
unlocked
60 seconds
Off
—O30 seconds
120 seconds
Open door warning buzzerOffOn—O
Reservation lockOnOff—O
12
FunctionDefault settingCustomized setting
Smart access system with push-
button start On Off — O
The doors that are unlocked
using the smart access system
with push-button start can be
selected Driver’s door All the doors O O
Number of consecutive door
lock operations 2 times As many as desired — O
12

765Alphabetical index
RX350/RX350L_U
I/M test .....................................................589
ICS (Intelligent Clearance Sonar) ...... 336 Indicator..................................................... 82
Warning light ...................................... 656
Warning messages.............. 340, 347
Identification Engine ..................................................... 700
Vehicle ................................................... 699
Ignition switch (engine switch)..........231
Illuminated entry system .................... 527
Immobilizer system..................................74
Indicators .................................................... 80
Initialization Engine oil maintenance data........597
Items to initialize..................................735
Power back door ................................ 138
Tire pressure warning system .... 605
Inside rear view mirror ........................ 182
Instrument panel light control ............ 88
Intelligent Clearance Sonar (ICS) ....................................................... 336 Indicator..................................................... 82
Warning light ...................................... 656
Warning messages.............. 340, 347
Interior lights........................................... 524 Switch...................................................... 525
Wattage ................................................. 705
Intuitive parking assist......................... 326 Jack
Positioning a floor jack....................593
Vehicle-equipped jack ................... 667
Jack handle .............................................. 667
Jam protection function Electronic sunshade...........................196
Moon roof ............................................... 192
Panoramic moon roof.......................196
Power back door openerand closer ........................................... 138
Power windows................................... 188
Keyless entry Smart access system with push-button start ..............................146
Wireless remote control....... 120, 130
Keys ............................................................. 120 Battery-saving function ....................148
Electronic key ........................................120
Engine switch ........................................ 231
If the electronic key does not operate properly ............................684
If you lose your keys........................... 123
Key number plate ................................120
Keyless entry ..........................................120
Mechanical key.......................................121
Replacing the battery ...................... 623
Warning buzzer................................... 125
Wireless remote control..................120
Knee airbags .............................................. 37
IJ
K
*: Refer to the “NAVIGATION SYSTEM OWNER’S MANUAL”.