2010 Lexus GS350 key battery

42
1-2. Opening, closing and locking the doors and trunk
GS_G_U (OM30C80U)
June 29, 2011 10:30 am
■Security feature
P. 3 7
■If the wireless remote control does not operate properly
● Locking and unlocking the doors and trunk: Use the mechanical key. 
(P. 5 7 1 )
●Starting the engine. (P. 5 7 2 )
■Electronic key battery depletion
P. 3 5
■When the electronic key battery is fully depleted
P. 4 8 2
■Conditions affecting operation
P. 3 3
■Customization that can be configured at Lexus dealer
Settings (e.g. 2-step unlocking function, trunk unlocking function) can be changed.
(Customizable features P. 6 1 8 )
■Certification for wireless remote control
For vehicles sold in the U.S.A
NOTE:
This device complies with part 15 of the FCC Rules. Operation is subject to the fol-
lowing two conditions: (1) This device may not cause harmful interference, and (2)
this device must accept any interference received, including interference that may
cause undesired operation.
FCC WARNING:
Changes or modifications not expressly approved by the party responsible for
compliance could void the user’s authority to operate the equipment.
For vehicles sold in Canada
NOTE:
Operation is subject to the following two conditions: (1) this device may not cause
interference, and (2) this device must accept any interference, including interfer-
ence that may cause undesired operation of the device.

89
1-6. Theft deterrent system
1
Before driving
GS_G_U (OM30C80U)
June 29, 2011 10:30 am
■When the 12 volt battery is disconnected
Be sure to cancel the alarm system. 
If the 12 volt battery is disconnected before canceling the alarm, the system may be
triggered when the battery is reconnected.
■Alarm-operated door lock
●When the alarm is operating, the doors are locked automatically to prevent
intruders.
●Do not leave the key inside the vehicle when the alarm is operating, and make
sure the key is not inside the vehicle when recharging or replacing the 12 volt
battery.
■Pa n i c m o d e
NOTICE
■To ensure the system operates correctly
Do not modify or remove the system. If modified or removed, the proper operation
of the system cannot be guaranteed.
When is pressed for longer than about
one second, an alarm will sound intermit-
tently and the vehicle lights will flash to deter
any person from trying to break into or dam-
age your vehicle.
To stop the alarm, press any button on the
electronic key.

137
2-1. Driving procedures
2
When driving
GS_G_U (OM30C80U)
June 29, 2011 10:30 am
■If the engine does not start
The immobilizer system may not have been deactivated. (P. 8 5 )
■When the steering lock cannot be released
■When the “ENGINE START STOP” switch indicator flashes in amber
The system may be malfunctioning. Have the vehicle inspected by your Lexus
dealer immediately.
■Auto power OFF function
If the vehicle is left in ACCESSORY or IGNITION ON mode (the engine is not
running) for more than an hour with the shift lever in P, the “ENGINE START STOP”
switch will automatically turn off. However, this function cannot entirely prevent bat-
tery discharge. Do not leave the vehicle with the “ENGINE START STOP” switch in
ACCESSORY or IGNITION ON mode for long periods of time when the engine
is not running.
■Electronic key battery depletion
P. 3 5
■When the electronic key battery is discharged
P. 4 8 2
■Conditions affecting operation
P. 3 3
The green indicator light on the “ENGINE
START STOP” switch will flash and a mes-
sage will be shown on the multi-information
display. Press the “ENGINE START STOP”
switch again while turning the steering wheel
left and right.

159
2-3. Operating the lights and windshield wipers
2
When driving
GS_G_U (OM30C80U)
June 29, 2011 10:30 am
■Headlight control sensor
■Automatic light off system
The headlights and tail lights turn off 30 seconds after all doors are closed if the
“ENGINE START STOP” switch has been switched to ACCESSORY mode or
turned OFF while the headlights are turned on. (The lights turn off immediately if
the button on the key is pressed after all doors are locked.)
To turn the lights on again, switch to IGNITION ON mode, or turn the light switch
off once and then back to the
or position.
■Automatic headlight leveling system
The level of the headlights is automatically adjusted according to the number of
passengers and the loading condition of the vehicle to ensure that the headlights do
not interfere with other road users.
■If the indicator flashes...
It may indicate a malfunction in the system. Contact your Lexus dealer.
■Customization that can be configured at Lexus dealer
Settings (e.g. light sensor sensitivity) can be changed. 
(Customizable features P. 6 2 1 )
NOTICE
■To prevent 12 volt battery discharge
Do not leave the lights on longer than necessary when the engine is off.
The sensor may not function properly if an
object is placed on the sensor, or anything
that blocks the sensor is affixed to the wind-
shield. 
Doing so interferes with the sensor detecting
the level of ambient light and may cause the
automatic headlight system to malfunction.

Maintenance and care4
429
GS_G_U (OM30C80U)
June 29, 2011 10:30 am
4-1. Maintenance and care
Cleaning and protecting 
the vehicle exterior............ 430
Cleaning and protecting 
the vehicle interior .............. 4334-2. Maintenance
Maintenance 
requirements........................ 436
General maintenance .......... 438
Emission inspection and 
maintenance (I/M) 
programs ................................ 441
4-3. Do-it-yourself maintenance
Do-it-yourself service 
precautions ........................... 442
Hood .......................................... 445
Positioning a floor jack ......... 446
Engine compartment ........... 448
Tires............................................ 463
Tire inflation pressure........... 473
Wheels ....................................... 477
Air conditioning filter ............ 479
Electronic key battery.......... 482
Checking and replacing 
fuses ........................................ 484
Headlight aim ......................... 509
Light bulbs ................................. 512

482
4-3. Do-it-yourself maintenance
GS_G_U (OM30C80U)
June 29, 2011 10:30 am
Electronic key battery
Replace the battery with a new one if it is discharged.
■You will need the following items:
●Flathead screwdriver
●Small Phillips-head screwdriver
●Lithium battery (CR1632)
■Replacing the battery
Take out the mechanical key.
Remove the cover.
Remove the depleted battery.
Insert a new battery with the “+”
terminal facing up.
STEP1
STEP2
STEP3

483
4-3. Do-it-yourself maintenance
4
Maintenance and care
GS_G_U (OM30C80U)
June 29, 2011 10:30 am
■If the electronic key battery is discharged
The following symptoms may occur.
●The smart access system with push-button start and wireless remote control will
not function properly.
●The operational range is reduced.
■Use a CR1632 lithium battery
●Batteries can be purchased at your Lexus dealer, jewelers, or camera stores.
●Replace only with the same or equivalent type recommended by your Lexus
dealer.
●Dispose of used batteries according to the local laws.
■When the card key battery needs to be replaced
The battery for the card key is available only at Lexus dealers. Your Lexus dealer
can replace the battery for you.
CAUTION
■Removed battery and other parts
Keep away from children. 
These parts are small and if swallowed by a child they can cause choking.
NOTICE
■For normal operation after 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 components inside the electronic key.
●Do not bend the battery terminals.

When trouble arises5
519
GS_G_U (OM30C80U)
June 29, 2011 10:30 am
5-1. Essential information
Emergency flashers.............. 520
If your vehicle needs 
to be towed ............................. 521
If you think something is 
wrong ..................................... 530
Fuel pump shut off 
system ...................................... 531
Event data recorder .............. 5325-2. Steps to take in an 
emergency
If a warning light turns 
on or a warning buzzer 
sounds..................................... 534
If a warning message is 
displayed................................ 543
If you have a flat tire (Vehicles 
with standard tires) ............. 556
If you have a flat tire (Vehicles 
with run-flat tires)................ 566
If the engine will not start .... 568
If the shift lever cannot be 
shifted from “P”.................... 569
If you lose your keys .............. 570
If the electronic key does 
not operate properly............ 571
If the 12 volt battery is 
discharged ............................. 574
If your vehicle overheats ..... 578
If the vehicle becomes 
stuck......................................... 581
If your vehicle has to be stopped 
in an emergency .................. 583