key battery Lexus GS450h 2007 Using the hands-free system (for cellular phone) / LEXUS 2007 GS450H FROM JULY 2006 PROD. (OM30A05U) User Guide

402
4-3. Do-it-yourself maintenance
■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 a Lexus dealer.
●Dispose of used batteries according to the local laws.
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 comp onents inside the electronic key.
●Do not bend the battery terminals.

When trouble arises5
427
5-1. Essential information............ 428If your vehicle needs to be 
towed .......................................... 428
If you think something is 
wrong .......................................... 435
Event data recorder ................. 436
5-2. Steps to take in an 
emergency............................ 438
If a warning light turns on or a 
warning buzzer sounds............ 438
If a warning message is 
displayed.................................... 444
If you have a flat tire (Vehicles 
with run-flat tires) ................... 460
If you have a flat tire (Vehicles 
with standard tires) .................. 461
If the hybrid system will not 
start ................................................ 471
If the shift lever cannot be 
shifted from P............................ 472
If you lose your keys .................. 473
When the electronic key 
battery is discharged ............. 474
If the 12 volt battery is 
discharged ................................. 476
If your vehicle overheats ....... 480
If the vehicle becomes  stuck ............................................ 483

458
5-2. Steps to take in an emergency
InteriorbuzzerExterior buzzerWa r n i n g m e s s a g eDetailsCorrection procedure
Once3 times
(Flashing)
An open door
other than the
driver's door is
closed while the
electronic key is
outside the detec-
tion range and the
power switch is in
“ACC” or “IG-
ON” mode with
the shift lever in
“P”.
Tu r n t h e
power
switch
“OFF” or
confirm the
location of
the elec-
tronic key.
Contin-
uousContin-
uous
(Displayed alternately)
(Flashing)
An open door
other than the
driver's door is
closed while the
electronic key is
outside the detec-
tion range and the
power switch is in
“ACC” or “IG-
ON” mode with
the shift lever not
in “P”.
•Shift the shift lever
to “P”.
•Confirm the loca-
tion of the
electronic
key.
Once
(Flashing)
The electronic key
battery is low.Replace the
battery.
( P. 4 0 1 )

5
When trouble arises
471
5-2. Steps to take in an emergency
If the hybrid system will not start
If the hybrid system will not start even though correct starting procedures
are being followed (
P. 103), consider each of the following points.
■The hybrid system will not start ev en if you are carrying the cor-
rect electronic key
One of the following may be the cause of the problem.
● The electronic key battery may be discharged. ( P. 17)
● There may not be sufficient fuel in the vehicle’s tank. 
Add fuel to the vehicle.
● There may be a malfunction in the steering lock system.
● There may be a malfunction in the hybrid vehicle immobilizer sys-
tem. 
( P. 5 9 )
■ The interior lights and headlights are dim, or the horn does not
sound or sounds at a low volume
One of the following may be the cause of the problem.
● The 12 volt battery may be discharged. ( P. 4 76 )
● The 12 volt battery terminal connections may be loose or cor-
roded.
■ The interior lights and headlights do not turn on, or the horn does
not sound
One of the following may be the cause of the problem.
●One or both of the 12 volt battery terminals may be discon-
nected.
● The 12 volt battery may be discharged. ( P. 4 76 )
Contact your Lexus dealer if the problem cannot be repaired, or if
repair procedures are unknown.

474
5-2. Steps to take in an emergency
When the electronic key battery is discharged
Locking and unlocking the doors, unlocking the trunk and key linked functions
DoorsUsing the mechanical key in order
to perform the following opera-
tions:
Locks all doors
Closes the windows/moon roof
(turn and hold)
Unlocks the door
Turning the key rearward unlocks
the driver's door. Turning the key
once again unlocks the other
doors.
Opens the windows/moon roof
(turn and hold)
Tr u n k
Turn the mechanical key clock-
wise to open.
If the electronic key battery is di scharged, the doors and trunk can be
opened by the mechanical key. The hybrid system can be still started by fol-
lowing the procedure.

5
When trouble arises
475
5-2. Steps to take in an emergency
Starting the hybrid systemPut the shift lever in “P” and apply the brakes. Hold the electronic key close to
the power switch (within 0.4 in. [10
mm]). Make sure that the button
side of the key is facing away from
the power switch.
An alarm will sound to indicate that
the start function cannot detect the
key with the depleted battery if any
of the doors will be opened and
closed while this operation.
Press the power switch within 5 seconds after the buzzer sounds,
keeping the brake pedal depressed.
If the hybrid system still cannot be started, contact your Lexus dealer.
STEP1
STEP2
■Replacing the key battery
As this procedure is the temporary measure, it is recommended that the electronic
key battery be replaced immediately. ( P. 4 0 1 )
STEP3

476
5-2. Steps to take in an emergency
If the 12 volt battery is discharged
The following procedures may be used to start the hybrid system if the 12
volt battery is discharged.
You can call your Lexus dealer, Roadside Assistance or Lexus Customer
Service.
If you have a set of jumper (or booster) cables and a second vehicle
with a 12 volt battery, you can jump start your Lexus following the steps
below.
Open the trunk using the mechanical key. ( P. 4 74 )
Connecting the jumper cables. If required, remove all vent pl ugs from the booster battery. Lay a
cloth over the open vents on the booster battery. (This helps reduce
the explosion hazard, personal injuries and burns.)
Positive (+) battery terminal on your vehicle.
Positive (+) battery terminal on the second vehicle.
Negative (-) battery terminal on the second vehicle.
Negative (-) battery terminal on your vehicle.
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 battery of your vehicle.
Open and close any of the door s with the power switch “OFF”.
STEP1
STEP2
STEP3
STEP4

519
Alphabetical index
Installing CRS with lower 
anchorages .......................................... 89
Installing CRS with seatbelts .......... 85
Installing CRS with top straps ........ 90
Child safety Airbag precautions .............................. 72
Child restraint system ........................ 82
Child-protectors....................................26
How your child should wear 
the seatbelt ............................................43
Installing child restraints .................... 85
Moon roof ................................................ 54
Power window lock switch ............. 50
Power window precautions.............. 51
Removed electronic key battery 
precautions ....................................... 402
Seat belt comfort guide....................... 41
Seat belt precautions...........................44
Seat heater precautions .........319, 321
Trunk............................................................32
Cigarette lighter ..................................... 317
Cleaning Exterior ................................................... 352
Interior..................................................... 354
Seat belts ............................................... 355
Clock........................................................... 314
Coin holder ............................................ 309
Compass ................................................. 334
Condenser............................................... 377
Console box........................................... 307
Cooling system Engine overheating ..........................480 Cruise control
Cruise control........................................129
Dynamic radar cruise control........132
Cup holders ............................................. 310
Curtain shield airbags............................ 66
Customizable features ........................ 510
Daytime running light system ........... 123
Defogger Rear window ......................................... 199
Side mirror.............................................. 199
Dimension................................................486
Dinghy towing ......................................... 182
Display Energy flow ................................................. 6
Multi-information display .................. 119
Touch screen ........................................ 184
Trip information ................................... 120
Warning message ............................. 444
Do-it-yourself maintenance .............363
Door courtesy lights ............................304
Door pocket............................................... 311
Doors Door lock .................................................. 25
Rear door child protector ................ 26
Driver's seat belt reminder light .....440
Driving Correct posture..................................... 64
Procedures ..............................................96
DVD player/changer.......................... 232
Electronic key Replacing battery................................ 401
When the electronic key battery 
is discharged..................................... 474
D
E

520
Alphabetical index
Emergency, in case ofIf a warning light turns on ..............438
If a warning message is 
displayed ............................................ 444
If the hybrid system will not 
start.......................................................... 471
If the shift lever cannot be  shifted from P ....................................472
If the 12 volt battery is 
discharged ....................................... 476
If you have a flat tire .............. 460, 461
If you lose your keys......................... 473
If you think something is 
wrong ................................................... 435
If your vehicle becomes stuck.....483
If your vehicle needs to be 
towed ................................................... 428
If your vehicle overheats ............... 480
When the electronic key battery 
is discharged .................................... 474
Energy monitor............................................ 6
Engine Compartment .....................................369
Hood........................................................366
How to start the hybrid system ... 103
If the hybrid system will not 
start.......................................................... 471
Overheating........................................ 480
Power switch ........................................ 103
Engine compartment cover .............370
Engine coolant temperature 
gauge......................................................... 112
Engine/inverter coolant Capacity .................................................490
Checking ............................................... 376
Preparing and checking before winter ...................................... 176 Engine oil
Capacity ................................................ 489
Checking................................................. 371
Preparing and checking 
before winter...................................... 176
Engine oil maintenance data ........... 374
EPS (Electric Power Steering) .........164
Event data recorder ............................ 436
First-aid kit storage belt ..................... 327
Floor mats ................................................ 326
Fluid Brake ....................................................... 378
Washer................................................... 382
Fog lights Switch ........................................................ 125
Wattage ................................................. 494
Foot light .................................................. 304
Front passenger occupant 
classification system ............................. 77
Front passenger's seat belt 
reminder light ..................................... 440
Front seats Adjustment ...............................................33
Driving position memory ..................35
Front turn signal lights Wattage ................................................. 494
Fuel Capacity ................................................ 488
Fuel gauge ................................................ 112
Gas station information ................. 528
Information ........................................... 495
Refueling ................................................... 55
Messages .............................................. 456
Fuel filler door ........................................... 55
Fuses .......................................................... 403
F

521
Alphabetical index
Garage door opener.......................... 329
Gas station information ..................... 528
Gauges.........................................................112
Glove box ............................................... 307
Hands-free system ................................ 261
Head restraints......................................... 38
Headlight aim .......................................... 419
Headlight cleaner .................................. 128
HeadlightsAFS (Adaptive Front lighting 
System) ................................................. 123
Discharge headlights 
precautions ....................................... 426
Replacing light bulbs ......................... 421
Switch ........................................................ 122
Wattage ................................................. 494
Heaters Seat heaters..................................319, 321
Side mirror ..............................................199
Hill-start assist control ......................... 164
Hood ......................................................... 366
Hooks Cargo.......................................................327
Shopping bag.......................................327
Hybrid system .................................................. 2
Emergency shut o ff system .................6
Energy monitor/consumption 
screen .........................................................6
High voltage components ...................5
Power meter ............................................ 112
Power switch .........................................103
Hybrid vehicle immobilizer 
system ....................................................... 59 Illuminated entry system ....................303
I/M test...................................................... 362
Indicator lights........................................... 116
Initialization
Items to initialize .................................. 514
Inside rear view mirror .......................... 47
Instrument panel light control ............ 113
Interior lights Interior lights ........................................ 304
Wattage ..................................................494
Intuitive parking assist ............................ 141
Jack Positioning the jack ...........................367
Replacing the wheel .......................... 461
Jack handle............................................... 461
Keys If you lose your keys ......................... 473
Key number plate .................................... 11
Keys ................................................................ 11
Power switch......................................... 103
Mechanical key ......................................... 11
When the electronic key battery 
is discharged..................................... 474
Wireless remote control ................... 22
Lexus Link System ............................... 338
Light bulbs Replacing .................................................421
Wattage ..................................................494
Light sensitive optitron meter............. 114
Lights Fog light switch .................................... 125
Headlights switch................................. 122
Interior lights list ................................. 303G
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