key battery Lexus GS350 2017 Owner's Guide

5907-2. Steps to take in an emergency
GS350_200t_GS F_OM_OM30F83E_(EE)
If the engine will not start
One of the following may be the cause of the problem: ●There may not be sufficient fuel in the vehicle’s tank.
Refuel the vehicle.
● The engine may be flooded.
Try to restart the engine again following correct starting procedures. ( P. 240)
● There may be a malfunction in the engine immobilizer system. ( P. 86)
One of the following may be the cause of the problem: ● The battery may be discharged. ( P. 597)
● The battery terminal connections may be loose or corroded.
The engine starting system may be malfunctioning due to an electrical problem
such as electronic key battery depletion or a blown fuse. However, an interim
measure is available to start the engine. ( P. 591)
One of the following may be the cause of the problem: ● One or both of the battery terminals may be disconnected.
● The battery may be discharged. ( P. 597)
● There may be a malfunction in the steering lock system.
Contact any authorized Lexus retailer or Le xus authorized repairer, or any reliable
repairer if the problem cannot be repaired , or if repair procedures are unknown.
If the engine will not start even though correct starting procedures are being
followed ( P. 240), consider each of the following points:
The engine will not start even thou gh the starter motor operates nor-
mally.
The starter motor turns over slowly , the interior lights and headlights
are dim, or the horn does not so und or sounds at a low volume.
The starter motor does not turn over
The starter motor does not turn over , the interior lights and headlights
do not turn on, or the horn does not sound.

5947-2. Steps to take in an emergency
GS350_200t_GS F_OM_OM30F83E_(EE)
If the electronic key does not operate properly
■Doors
Use the mechanical key (P. 155)
in order to perform the following
operations:
Locks all the doors
Closes the windows and moon
roof (turn and hold) *
Unlocks all the doors
Opens the windows and moon
roof (turn and hold) *
* : This setting must be customized at any authorized Lexus retailer or Lexus autho-
rized repairer, or any reliable repairer.
■Trunk
Turn the mechanical key clockwise
to open.
If communication between the electronic key and vehicle is interrupted ( P. 175)
or the electronic key cannot be used be cause the battery is depleted, the smart
entry & start system and wireless remote control cannot be used. In such cases,
the doors and trunk can be opened and the engine can be started by following the
procedure below.
Locking and unlocking the doors, unlocking the trunk and key linked
functions
1
2
3
4

595
7-2. Steps to take in an emergency
7
When trouble arises
GS350_200t_GS F_OM_OM30F83E_(EE)
Ensure that the shift lever is in P and depress the brake pedal.
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 entry & start system is
deactivated in customization setting, the
engine switch will turn to ACCESSORY
mode.
Firmly depress the brake pedal and check that and a message (GS F
only) are shown on the multi-information display.
Press the engine switch.
In the event that the engine still cannot be started, contact any authorized Lexus
retailer or Lexus authorized repairer, or any reliable repairer.
■Stopping the engine
Shift the shift lever to P and press the engine switch as you normally do when stopping
the engine.
■Replacing the key battery
As the above procedure is a temporary measure, it is recommended that the electronic
key battery be replaced immediately when the battery is depleted. ( P. 491)
■Alarm (if equipped)
Using the mechanical key to lock the doors or trunk will not set the alarm system.
If a door or trunk are unlocked using the me chanical key when the alarm system is set,
the alarm may be triggered. ( P. 92)
■Changing engine switch modes
Release the brake pedal and press the engine switch in step above.
The engine does not start and modes will be changed each time the switch is pressed. ( P. 241)
■When the electronic key does not work properly
●Make sure that the smart entry & start syst em has not been deactivated in the customi-
zation setting. If it is off, turn the function on.
(Customizable features: P. 634)
●Check if battery-saving mode is set. If it is set, cancel the function. (P. 174)
Starting the engine
1
2
3
4
3

597
7
7-2. Steps to take in an emergency
When trouble arises
GS350_200t_GS F_OM_OM30F83E_(EE)
If the vehicle battery is discharged
If you have a set of jumper (or booster) cables and a second vehicle with a 12-volt
battery, you can jump start your vehicle by following the steps below.Confirm that the electronic key is
being carried.
When connecting the jumper (or
booster) cables, depending on the situa-
tion, the alarm may activate and doors
locked. ( P. 94)
Open the hood. ( P. 451)
GS200t/GS F: Remove the engine cover.
The following procedures may be used to start the engine if the vehicle’s bat-
tery is discharged.
You can also call any authorized Lexus retailer or Lexus authorized repairer,
or any reliable repairer.
1
2
3
GS200tGS F
Raise the front of the engine cover
to remove the front clips, and then
raise the rear of the engine cover
to remove the rear clips.

6007-2. Steps to take in an emergency
GS350_200t_GS F_OM_OM30F83E_(EE)
■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 componen ts when the vehicle is running at a low
speed for an extended period, such as in heavy traffic.
■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 draining 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 recharging or replacing the battery
●In some cases, it may not be possible to unlock the doors using the smart entry & start
system when the battery is discharged. Use the wireless remote control or the mechan-
ical 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 batter y discharged, be
especially careful when reconnecting the battery.

654What to do if... (Troubleshooting)
GS350_200t_GS F_OM_OM30F83E_(EE)
What to do if... (Troubleshooting)
●If you lose your mechanical keys, new genuine mechanical keys can be made
by any authorized Lexus retailer or Lexus authorized repairer, or any reliable
repairer. ( P. 156)
● If you lose your electronic keys, the risk of vehicle theft increases significantly.
Contact any authorized Lexus retailer or Lexus authorized repairer, or any
reliable repairer immediately. ( P. 157)
● Is the electronic key battery weak or depleted? ( P. 491)
● Vehicles with entry function
Is the engine switch in IGNITION ON mode?
When locking the doors, turn the engine switch off. ( P. 241)
● Vehicles with entry function
Is the electronic key left inside the vehicle?
When locking the doors, make sure that you have the electronic key on your person.
● The function may not operate properly due to the condition of the radio wave.( P. 175)
● Is the child-protector lock set?
The rear door cannot be opened from inside the vehicle when the lock is set.
Open the rear door from outside and then unlock the child-protector lock. ( P. 163)
If you have a problem, check the following before contacting any authorized
Lexus retailer or Lexus authorized repairer, or any reliable repairer.
The doors cannot be locked, un locked, opened or closed
You lose your keys
The doors cannot be locked or unlocked
The rear door cannot be opened

655
What to do if... (Troubleshooting)
GS350_200t_GS F_OM_OM30F83E_(EE)
● The function to prevent the electronic ke y from being left inside the trunk will
operate and you can open the trunk as usual. Take the key out from the trunk. (  P. 168)
● Did you press the engine switch while firmly depressing the brake pedal?
(  P. 240)
● Is the shift lever in P? ( P. 242)
● Is the electronic key anywhere detectable inside the vehicle? ( P. 173)
● Is the steering wheel unlocked? ( P. 242)
● Is the electronic key battery weak or depleted?
In this case, the engine can be started in a temporary way. ( P. 595)
● Is the battery discharged? ( P. 597)
● Is the engine switch in IGNITION ON mode?
If you cannot release the shift lever by depressing the brake pedal with the
engine switch in IGNITION ON mode ( P. 253)
● It is locked automatically to prevent theft of the vehicle. ( P. 242)
The trunk lid is closed with the electronic key left inside
If you think som
ething is wrong
The engine does not start
The shift lever cannot be shifted fr om P even if you depress the brake
pedal
The steering wheel cannot be turned after the engine is stopped

660Alphabetical index
GS350_200t_GS F_OM_OM30F83E_(EE)
Card key.................................................... 154
Care ............................................... 440, 444
Aluminum wheels ................................441
Exterior....................................................440
Interior ..................................................... 444
Seat belts ................................................445
Cargo hooks........................................... 424CD player *
Chains ...................................................... 385
Child restraint system ............................ 64 Baby seats, definition .......................... 65
Baby seats, installation ........................77
Child seats, definition.......................... 65
Child seats, installation........................77
Installing CRS with ISOFIX
rigid anchors........................................80
Installing CRS with seat belts...........77
Installing CRS with top strap ............81
Junior seats, definition ........................ 65
Junior seats, installation ..................... 79 Child safety ................................................ 63
Airbag precautions ............................. 53
Battery precautions............... 469, 601
Child restraint system .........................64
How your child should
wear the seat belt...................... 47, 48
Installing child restraints .....................76
Moon roof precautions .................. 220
Power window lock switch ............ 214
Power window precautions........... 216
Rear door child-protectors ............ 163
Removed electronic key battery precautions....................... 492
Seat belt comfort guide...................... 47
Seat belt precautions.......................... 50
Seat heater precautions ..................... 411
Trunk precautions .............................. 169
Child-protectors ....................................163
Cleaning........................................440, 444 Aluminum wheels................................ 441
Exterior ................................................... 440
Interior..................................................... 444
Seat belts ............................................... 445
C

662Alphabetical index
GS350_200t_GS F_OM_OM30F83E_(EE)
Double locking system ........................... 91
Drive info 1/Drive info 2/
Drive info 3 ................................. 126, 138 Drive information ...................... 122, 130
Resetting........................................ 122, 130
Drive-Start Control ..................223, 252
Driver’s seat position memory ......... 199 Driving position memory .............. 200
Memory recall function .................. 202
Power easy access system ............ 199
Driving ....................................................... 222 Break-in tips ......................................... 224
Correct driving posture .................... 44
Driving mode select switch ......... 358
Procedures ........................................... 222
Winter drive tips.................................383
Dynamic radar cruise control.......... 343 Function .................................................. 343
Warning message............................. 524
Dynamic radar cruise control with
full-speed range .................................. 331Function ....................................................331
Warning message............................. 524
DVD player *
Eco drive mode .................................... 358
Eco Driving Indicator ........................... 106
Eco Driving Indicator Light ................................................126, 137 Eco driving meter .................................... 113
Electric Power Steering (EPS) ....... 376
Function.................................................. 376
Warning light.........................................519
Warning message ............................ 524
Electronic key ..........................................154
Battery-saving function .................... 175
If the electronic key does not operate properly............................ 594
Replacing the battery ........................ 491
Emergency, in case of If a warning buzzer sounds ............518
If a warning light turns on ................518
If a warning message is
displayed ............................................ 524
If the battery is discharged ........... 597
If the electronic key does not operate properly............................ 594
If the engine will not start ...............590
If the parking brake cannot be released ....................................... 592
If you have a flat tire.............. 557, 573
If you think something is wrong ................................................ 516
If your vehicle becomes stuck ....608
If your vehicle has to be stopped in an emergency .........509
If your vehicle needs to
be towed ..............................................510
If your vehicle overheats................ 602
E

666Alphabetical index
GS350_200t_GS F_OM_OM30F83E_(EE)
Jack
Positioning the jack ........................... 452
Vehicle-equipped jack ...... 558, 575
Jack handle.................................. 558, 575
Jam protection function Moon roof .............................................. 218
Power trunk lid..................................... 169
Power window ...................................... 214
Keyless entry ............................................173 Smart entry & start system .............. 173
Wireless remote control ..................154
Keys ............................................................. 154 Battery-saving function.....................175
Electronic key ........................................154
Engine switch....................................... 240
If the electronic key does not operate properly ............................594
If you lose your keys ................ 156, 157
Key number plate ................................154
Keyless entry ............................... 154, 173
Mechanical key.................................... 155
Replacing the battery.........................491
Warning buzzer ................................... 174
Wireless remote control key .........154
Knee airbags............................................... 51 Language (multi-information
display) ....................................... 635, 637
Lever
Auxiliary catch lever........................... 451
Hood lock release lever .................. 451
Shift lever ............................................... 246
Turn signal lever................................. 255
Wiper lever ...........................................276
Lexus parking assist monitor *
Lexus parking assist-sensor *
Function *
Warning message ............................ 524
Lexus Safety System+......................... 286
AHS (Adaptive High-beam System) ............................................... 265
Automatic High Beam ................... 270
Dynamic radar cruise control ..... 343
Dynamic radar cruise control with full-speed range ..................... 331
LDA (Lane Departure Alert with steering control)..................... 317
LKA (Lane-Keeping Assist) ........ 307
PCS (Pre-Crash Safety system) ................................................ 295
RSA (Road Sign Assist) ................. 326
License plate lights .............................. 262 Light switch............................................262
Replacing light bulbs ....................... 504
Welcome light illumination
control ...................................................160
Light bulbs
Replacing............................................... 498
Wattage ................................................... 631
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