key LEXUS NX300h 2015 Workshop Manual

5337-3. Do-it-yourself maintenance
7
Maintenance and care
NX300h_U_OM78007U ■
Use a CR2032 lithium battery ●
Batteries can be purchased at your Lexus dealer, local electrical appliance shops or
camera stores. ●
Replace only with the same or equivalent type recommended by the manufacturer. ●
Dispose of used batteries according to the local laws. ■
When the card key battery needs to be replaced (if equipped)
The battery for the card key is available only at Lexus dealers. Your Lexus dealer can
replace the battery for you. ■
If the electronic key battery is depleted
The following symptoms may occur: ●
The smart access system with push-button start and wireless remote control will not
function properly. ●
The operational range will be reduced.
WA R N I N G ■
Removed battery and other parts
These parts are small and if swallowed by a child, they can cause choking. Keep away
from children. Failure to do so could result in death or serious injury.
NOTICE ■
For normal operation afte r replacing the battery
Observe the following precautions to prevent accidents: ●
Always work with dry hands.
Moisture may cause the battery to rust. ●
Do not touch or move any other component inside the remote control. ●
Do not bend either of the battery terminals.

555
8When trouble arises
NX300h_U_OM78007U 8-1. Essential information
Emergency flashers .................. 556
If your vehicle has to
be stopped in an
emergency................................. 557
8-2. Steps to take in an emergency
If your vehicle needs to
be towed .....................................558
If you think something is
wrong ........................................... 564
If a warning light turns on
or a warning buzzer
sounds.......................................... 565
If a warning message is
displayed..................................... 572
If you have a flat tire................... 575
If the hybrid system will not
start ...............................................589
If the shift lever cannot be
shifted from P............................. 591
If the electronic key does not
operate properly ..................... 592
If the 12-volt battery is
discharged ................................. 595
If your vehicle overheats ........ 600
If the vehicle becomes
stuck .............................................604

589
8
When trouble arises 8-2. Steps to take in an emergency
NX300h_U_OM78007UIf the hybrid system will not start One of the following may be the cause of the problem: ●
The electronic key may not be functioning properly.
(  P. 5 9 2 )●
There may not be sufficient fuel in the vehicle’s tank.
Refuel the vehicle. (  P. 8 3 )●
There may be a malfunction in the immobilizer system. (  P. 8 6 )●
There may be a malfunction in the steering lock system. ●
The hybrid system may be malfunctioni ng due to an electrical problem such
as electronic key battery depletion or a blown fuse. However, depending on
the type of malfunction, an interim meas ure is available to start the hybrid sys-
tem. (  P. 5 9 0 )
One of the following may be the cause of the problem: ●
The 12-volt battery may be discharged. (  P. 5 9 5 )●
The 12-volt battery terminal connections may be loose or corroded.
(  P. 5 1 2 )Reasons for the hybrid system not starting vary depending on the situation.
Check the following and perform the appropriate procedure:
The hybrid system will not start ev en though the correct starting proce-
dure is being followed. (  P. 201)
The interior lights and headlights are dim, or the horn does not sound or
sounds at a low volume.

592 8-2. Steps to take in an emergency
NX300h_U_OM78007UIf the electronic key do es not operate properlyUse the mechanical key (  P. 119) to perform the following operation■
Unlocking the door
Insert the mechanical key while pull-
ing on the driver’s door handle.
Unlocking the door.
Remove the key, return the handle, and then pull the handle again.If communication between the electron ic key and vehicle is interrupted
(  P. 142) or the electronic key cannot be used because the battery is
depleted, the smart access system with push-button start and wireless
remote control cannot be used. In such cases, the doors can be opened and
the hybrid system can be started by following the procedure below.
Locking and unlocking the doors 1
2
3

5938-2. Steps to take in an emergency
8
When trouble arises
NX300h_U_OM78007U ■
Locking the door
Move the inside lock button to the
lock position.
Close the door. ■
Key linked functions
Ensure that the shift lever is in P and depress the brake pedal.
Touch the Lexus emblem side of the
electronic key to the power switch. When the electronic key is detected, a
buzzer sounds and the power switch will
turn to ON mode.
When the smart access system with
push-button start is deactivated in cus-
tomization setting, the power switch will
turn to ACCESSORY mode.
Firmly depress the brake pedal and
check that message shown on the
multi-information display. 1
Closes the windows and moon roof
*
(turn and hold)
Opens the windows and moon roof
*
(turn and hold)
* : These settings must be customized at your
Lexus dealer or repairer, or another duly
qualified and equipped professional.
Starting the hybrid system 2 1
2
1
2
3

594 8-2. Steps to take in an emergency
NX300h_U_OM78007U Press the power switch.
In the event that the hybrid system st ill cannot be operated, contact your Lexus
dealer. ■
Stopping the hybrid system
Set the parking brake, shift the shift lever to P and press the power switch as you normally
do when stopping the hybrid system. ■
Replacing the key battery
As the above procedure is a temporary measure, it is recommended that the electronic
key battery be replaced immediatel y when the battery is depleted. (  P. 5 3 2 )■
Alarm (if equipped)
Using the mechanical key to lock the doors will not set the alarm system. If a door is
unlocked using the mechanical key when the al arm system is set, the alarm may be trig-
gered. ■
Changing power switch modes
Release the brake pedal and press the power switch in step above.
The hybrid system does not start and mode s will be changed each time the switch is
pressed. (  P. 202)■
When the electronic key does not work properly ●
Make sure that the smart access system wi th push-button start has not been deacti-
vated in the custom ization setting. If it is off, turn the function on.
(Customizable features  P. 6 3 5 )●
Check if battery-saving mo de is set. If it is se t, cancel the function. (  P. 1 4 2 )
WA R N I N G ■
When using the mechanical key and operating the power windows or moon roof
Operate the power window or moon roof afte r checking to make sure that there is no
possibility of any passenger having any of their body parts caught in the window or
moon roof.
Also, do not allow children to operate the mech anical key. It is possible for children and
other passengers to get caught in the power window or moon roof. 4
3

5978-2. Steps to take in an emergency
8
When trouble arises
NX300h_U_OM78007U Start the engine of the second vehicle. Increase the engine speed slightly and
maintain at that level for approximately 5 minutes to recharge the 12-volt bat-
tery of your vehicle.
Open and close any of the doors of your vehicle with the power switch off.
Maintain the engine speed of the second vehicle and start the hybrid system
of your vehicle by turning the power switch to ON mode.
Make sure the “READY” indicator comes on. If the indicator light does not
come on, contact your Lexus dealer.
Once the hybrid system has started, remove the jumper cables in the exact
reverse order from which they were connected.
Close the exclusive jump starting terminal cover, and reinstall the fuse box
cover to its original position.
Once the hybrid system starts, have th e vehicle inspected at your Lexus dealer
as soon as possible. ■
Starting the hybrid system when the 12-volt battery is discharged
The hybrid system cannot be started by push-starting. ■
To prevent 12-volt battery discharge ●
Turn off the headlights and the audio system while the hybrid system 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. ■
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 discharge and the draining effects of certain electrical appli-
ances. If the vehicle is left for a long time, the 12-volt battery may discharge, and the
hybrid system may be unable to start. (The 12-volt battery recharges automatically while
the hybrid system is operating.) ■
When the 12-volt battery is removed or discharged ●
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 mechanical key to lock or unlock the doors. ●
The hybrid system may not start on the first attempt after the 12-volt battery has
recharged but will start normally after the second attempt. This is not a malfunction.●
The power 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 power switch off.
If you are unsure what mode the power switch was in before the 12-volt battery dis-
charged, be especially careful when reconnecting the 12-volt battery. ●
The power back door must be initialized. (  P. 1 3 4 )●
Make sure that the key is not inside the vehicle when recharging or replacing the
12-volt battery. The key may be locked in the vehicle if the alarm is activated. (  P. 88)5
6
7
8
9
10

634 9-2. Customization
NX300h_U_OM78007U Settings that can be changed using the Remote Touch or Lexus Display Audio
controller
Settings that can be changed us ing the multi-information display
Settings that can be changed by your Lexus dealer
Settings that can be changed using the vehicle switch
Definition of symbols: O = Available, – =Not available ■
Door lock (  P. 1 2 4 , 5 9 2 )Customizable Features 1
2
3
4
Function Default
setting Customized
setting
Unlocking using a mechanical
key Driver’s door
unlocked in first
step, all doors
unlocked in
second step All doors
unlocked in first
step – – O –
Automatic door locking func-
tion Shift position
linked door
locking opera-
tion Off O – O –
Speed linked
door locking
operation O – O –
Automatic door unlocking
function Shift position
linked door
unlocking oper-
ation Off O – O –
Driver’s door
linked door
unlocking oper-
ation O – O – 1 2 3 4

6379-2. Customization
9
Vehicle specifications
NX300h_U_OM78007U ■
Illumination (  P. 443)Function Default
setting Customized
setting
Time elapsed before the inte-
rior lights turn off 15 seconds Off
O–O–7. 5 s e c o n d s
30 seconds
Time elapsed before the exte-
rior lights turn off 15 seconds Off
O – O –7. 5 s e c o n d s
30 seconds
Operation after the power
switch is turned off On Off – – O –
Operation when the doors
are unlocked On Off – – O –
Operation when you
approach the vehicle with the
electronic key on your person On Off – – O –
Footwell lighting On Off – – O –
Fading out of the outer foot
lights when they turn off Long Short – – O – 1 2 3 4

6399-2. Customization
9
Vehicle specifications
NX300h_U_OM78007U ■
Automatic air conditioning system (  P. 4 3 0 )
■
Eco drive mode (  P. 3 0 3 )
■
Powe r w i n d ow s (  P. 166)
■
Moon roof
* (  P. 1 6 9 )
* : If equipped Function Default
setting Customized
setting
Switching between outside air
and recirculated air mode
linked to “AUTO” switch
operation On Off O – O –
A/C Auto switch operation On Off O – O – 1 2 3 4
Function Default
setting Customized
setting
Heating/cooling operation
minimized in Eco drive mode On Off – – O – 1 2 3 4
Function Default
setting Customized
setting
Mechanical key linked opera-
tion Off On – – O –
Wireless remote control
linked open operation Off On – – O – 1 2 3 4
Function Default
setting Customized
setting
Mechanical key linked opera-
tion Off On – – O –
Wireless remote control
linked open or Tilt up opera-
tions Off On – – O – 1 2 3 4