Page 368 of 448

3687-2. Steps to take in an emergency
■Locking and unlocking the door
1 Push in the depression on the front 
edge of the driver’s door handle.
2 Insert the mechanical key while 
pulling on the driver’s door handle.
3 Turn the key in order to perform the 
following operations.
Locks both side doors
Closes the windows (turn and 
hold)
*
Unlocks the door
Turning the key rearward unlocks the 
driver’s door. Turning the key once again 
within 5 seconds unlocks the other door.
Opens the windows (turn and 
hold)
*
*: These settings must  be customized at 
your Lexus dealer.
■Opening the trunk
Unlock the doors, and press the trunk 
opener switch.
1 Depress the brake pedal.
2 Touch the Lexus emblem side of the 
electronic key to the engine switch 
.
When the electronic key is detected, a 
buzzer sounds and the engine switch 
 will turn to IGNITION ON 
mode .
When the smart access system with push-
button start is deactivated in customization 
setting, the engine switch  
A
B
C
D
WARNING
■When using the mechanical key and 
operating the power windows
Operate the power window after check-
ing to make sure that there is no possibil-
ity of any passenger  having any of their 
body parts caught in the window. 
Also, do not allow children to operate the 
mechanical key. It is possible for children 
and other passengers  to get caught in 
the power window.
Starting the engine 
tem> 
         
        
        
     
        
        Page 369 of 448

3697-2. Steps to take in an emergency
7
When trouble arises
will turn to ACCESSORY mode.
3Firmly depress the brake pedal and 
check that   is shown on the 
multi-information display.
4 Press the engine switch 
switch>.
In the event that the engine 
tem> still cannot be started, contact 
your Lexus dealer.
■Stopping the engine 
Set the parking brake, shift the shift position 
to P and press the engine switch 
switch> as you normally do when stopping 
the engine .
■Electronic key battery
As the above procedure is a temporary 
measure, it is recomme nded that the elec-
tronic key battery be replaced immediately 
when the battery is depleted. ( P.330)
■Changing engine switch  
modes
Release the brake pedal and press the 
engine switch  in step  3 
above.
The engine  does not start 
and modes will be changed each time the 
switch is pressed. ( P.155, 159)
Use the mechanical key ( P.108) in 
order to perform th e following opera-
tions:
■Locking and unlocking the doors
 P.367
■Opening the trunk
1 Slide the rear passengers’ seat 
belts towards the outside.
2 Insert your fingers at the positions 
marked   and pull towards you to 
If the 12-volt battery is dis-
charged
The following procedures may be 
used to start the engine 
tem> or opening the doors, trunk or 
glove box if the 12-volt battery is 
discharged.
You can also call your Lexus dealer 
or a qualified repair shop.
Locking and unlocking the doors 
and opening the trunk
A 
         
        
        
     
        
        Page 370 of 448

3707-2. Steps to take in an emergency
remove the cover in the center of 
the rear seat.
3 Insert the mechanical key into the 
cylinder and turn it clockwise to 
open. The glove box can be opened by per-
forming the following
 operations after 
unlocking the doors.
If the glove box is locked, unlock it with the 
mechanical key. ( P.273)
1 Remove the cover using a flathead 
screwdriver.
To prevent damage to the cover, cover the 
tip of the screwdriver with a rag.
2Push the flathead screwdriver into 
the part shown in the illustration to 
open the glove box.
■After opening the glove box
The glove box can be opened normally by 
closing the glove box after restarting the 
engine .
If you have a set of jumper (or booster) 
WARNING
■After unlocking the trunk
Make sure to put back the cover to the 
center of the rear seat. Failure to do so 
may cause an accident.
NOTICE
■When installing the cover in the cen-
ter of the rear seat
Make sure that the seat belts are not 
caught in the cover. Failure to do so may 
cause damage to the cover installation 
clip and make it impossible to install the 
cover.
Opening the glove box
Restarting the engine 
system> 
         
        
        
     
        
        Page 371 of 448
3717-2. Steps to take in an emergency
7
When trouble arises
cables and a second vehicle with a 12-
volt battery, you can jump start your 
vehicle using the following procedure.
1Confirm that the electronic key 
(including the card key) is being 
carried.
When connecting the jumper (or booster) 
cables, depending on the situation, the 
alarm may activate and doors locked. 
( P.73)
2 Open the hood ( P.302) and 
open the fuse box cover.
Push the tab in and lift the lid off.
LC500
LC500h
3 Open the exclusive jump starting 
terminal cover.
LC500
LC500h
4 Remove the engine cover. 
         
        
        
     
        
        Page 374 of 448

3747-2. Steps to take in an emergency
■When the 12-volt battery is removed or 
discharged
●Information stored in the ECU is cleared. 
When the 12-volt battery is depleted, 
have the vehicle inspected at your Lexus 
dealer.
●Some systems may require initialization. 
( P.417)
■When removing the 12-volt battery ter-
minals
When the 12-volt battery terminals are 
removed, the information stored in the 
ECU is cleared. Before removing the 12-
volt battery terminals, contact your Lexus 
dealer.
■Charging the 12-volt battery
The electricity stored in the 12-volt battery 
will discharge gradually even when the 
vehicle is not in use, due to natural dis-
charge and the draining effects of certain 
electrical appliances. If the vehicle is left for 
a long time, the 12-volt battery may dis-
charge, and the engine  
may be unable to start. (The 12-volt battery 
recharges automatically during driving.)
■When recharging or replacing the 12-
volt battery
●In some cases, it may not be possible to 
unlock the doors using the smart access 
system with push-button start when the 
12-volt battery is discharged. Use the 
wireless remote control or the mechani-
cal key to lock or unlock the doors.
●The engine  may not start 
on the first attempt after the 12-volt bat-
tery has recharged bu t will start normally 
after the second attempt. This is not a 
malfunction.
●The engine switch  mode 
is memorized by the vehicle. When the 
12-volt battery is reconnected, the system 
will return to the mode it was in before 
the 12-volt battery was discharged. 
Before disconnecting the 12-volt battery, 
turn the engine switch  off. 
If you are unsure what mode the engine 
switch  was in before the 
12-volt battery discharged, be especially 
careful when reconnecting the 12-volt 
battery.
●If the 12-volt battery discharges, it may 
not be possible to shift the shift position to 
other positions. In this case, the vehicle 
cannot be towed without lifting both rear 
wheels because the re ar wheels will be 
locked. ( P.342)
■When replacing the 12-volt battery
●Use a Central Degassing type 12-volt 
battery (European Regulations).
●Type A*1: Use a 12-volt battery that the 
case size is same  as the previous one 
(LN4), 20 hour rate capacity (20HR) is 
equivalent (80Ah) or greater, and per-
formance rating (CCA) is equivalent 
(685A) or greater. 
Type B
*2: Use a 12-volt battery that the 
case size is same  as the previous one 
(LN3), 20 hour rate capacity (20HR) is 
equivalent (70Ah) or greater, and perfor-
mance rating (CCA) is equivalent 
(600A) or greater.
• If the sizes differ, the 12-volt battery can- not 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 12-volt battery 
may discharge and engine 
tem> may not be able to start.
●Use a 12-volt battery with a handle. If a 
12-volt battery without a handle is used, 
removal is more difficult.
●After exchanging, firmly attach the fol-
lowing items to the exhaust hole of the 12-
volt battery.
• Use the exhaust hose that was attached  to the 12-volt battery before exchanging.
• Use the exhaust hole plug included with  the 12-volt battery exchanged or the one 
installed on the battery prior to the 
exchange. (Depending on the 12-volt 
battery to be exchanged, the exhaust 
hole may be plugged.) 
         
        
        
     
        
        Page 409 of 448
4098-2. Customization
8
Vehicle specifications
*1: If equipped
*2: BSM function only
■Active rear wing* ( P.240)
*:If equipped
■Door lock ( P.110, 114, 367)
Alert timing for presence of 
approaching vehicle (sensitivity)
*2
(Intermediate)
(Early)
O(Late)
(Only when in blind 
spot)
RCTA buzzer volumeLevel 2Level 1OLevel 3
FunctionDefault settingCustomized setting
Operation of the active rear wingOffOnOO
FunctionDefault settingCustomized setting
Unlocking using a mechanical key
Driver’s door 
unlocked in one  step, both side 
doors unlocked  in two steps
Both side doors 
unlocked in one  step
O
Automatic door lock
Shifting the shift position to 
position other  than POff
OOVehicle speed is 
approximately 12 
mph (20 km/h) or  higher
FunctionDefault settingCustomized settingABC
ABC
ABC 
         
        
        
     
        
        Page 412 of 448
4128-2. Customization
■Power windows (P.138)
■Turn signal lever ( P.175)
■Automatic light control system ( P.181)
■Lights ( P.181)
*: U.S.A. only
FunctionDefault settingCustomized setting
Mechanical key linked operationOffOnO
Wireless remote control linked 
operationOffOn
(Open only)O
Wireless remote control linked 
operation signal (buzzer)OnOffO
FunctionDefault settingCustomized setting
The number of times the turn signal 
lights flash automatically when the 
turn signal lever is moved to the 
first position during a lane change
3
5
O7
Off
FunctionDefault settingCustomized setting
Light sensor sensitivityStandard-2 to 2OO
Time elapsed before headlights 
automatically turn off after doors 
are closed
30 seconds
Off
OO60 seconds
90 seconds
Windshield wiper linked headlight 
illuminationOnOffO
FunctionDefault settingCustomized setting
Daytime running lights*OnOffOO
Welcome light illumi nation controlOnOffO
ABC
ABC
ABC
ABC 
         
        
        
     
        
        Page 413 of 448

4138-2. Customization
8
Vehicle specifications
■Automatic air conditioning system (P.260)
■Seat heater/seat ventilators ( P.268)
■Heated steering wheel* ( P.268)
*:If equipped
■Illumination ( P.271)
FunctionDefault settingCustomized setting
A/C auto switch operationOnOffOO
Exhaust gas sensor sensitivityStandard-3 to 3OO
FunctionDefault settingCustomized setting
Driver’s seat temperature prefer-
ence in automatic modeStandard-2 (cooler) to 2 
(warmer)OO
Passenger’s seat temperature pref-
erence in automatic modeStandard-2 (cooler) to 2 (warmer)OO
FunctionDefault settingCustomized setting
Steering wheel heating preference 
in automatic modeStandard-2 (low) to 2 (high)OO
FunctionDefault settingCustomized setting
Time elapsed before the interior 
lights turn off15 seconds
Off
OO7.5 seconds
30 seconds
Operation after the engine switch 
 is turned offOnOffO
Operation when the doors are 
unlockedOnOffO
Operation when you approach the 
vehicle with the electronic key on 
your person
OnOffO
Footwell lightingOnOffO
Door trim ornament lightsOnOffO
ABC
ABC
ABC
ABC