warning light Lexus GS450h 2007 Do-it-yourself maintenance / LEXUS 2007 GS450H FROM JULY 2006 PROD. OWNER'S MANUAL (OM30A05U)

TABLE OF CONTENTSIndex
ii
1-1. Hybrid system .................................. 2Hybrid system ...................................... 2
1-2. Key information ............................. 11 Keys ......................................................... 11
1-3. Opening, closing and locking 
the doors and trunk ................... 13
Smart access system with  push-button start ........................... 13
Wireless remote control .............. 22
Doors.................................................... 25
Trunk..................................................... 29
1-4. Adjustable components ............ 33 Front seats .......................................... 33
Driving position memory 
system ............................................... 35
Head restraints................................ 38
Seat belts ............................................ 40
Steering wheel.................................. 46
Inside rear view mirror .................. 47
Outside rear view mirrors ........... 48
1-5. Opening and closing the 
windows and moon roof .......... 50
Power windows............................... 50
Moon roof .......................................... 52 1-6. Refueling ........................................ 55
Opening the fuel tank cap........... 55
1-7. Theft deterrent system............... 59 Hybrid vehicle immobilizer 
system ............................................... 59
Alarm..................................................... 61
Theft prevention labels 
(U.S.A.) ............................................. 63
1-8. Safety information ....................... 64 Correct driving posture ............... 64
SRS airbags ....................................... 66
Front passenger occupant 
classification system .................... 77
Child restraint sy stems ................. 82
Installing child restraints .............. 85
2-1. Driving procedures..................... 96 Driving the vehicle .......................... 96
Starting the hybrid system ......... 103
Transmission ................................... 106
Turn signal lever.............................. 110
Parking brake .................................... 111
2-2. Instrument cluster ...................... 112 Gauges and meters ....................... 112
Indicators and warning lights ..... 116
Multi-information display............. 119
1Before driving
2When driving

1
2
3
4
5
6
7
v
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 6-1. Specifications............................ 486
Maintenance data ........................ 486
Fuel information ............................ 495
Tire information ........................... 498
6-2. Customization ........................... 510 Customizable features ............... 510
6-3. Initialization ................................ 514 Items to initialize ............................ 514
Reporting safety defects for 
U.S. owners................................... 516
Alphabetical index.................... 518
What to do if............................... 526
5When trouble arises6Vehicle specifications
7For US owners
Index

9
1-1. Hybrid system
1
Before driving
■If a warning light comes on or a warning message is displayed, or the 12 volt bat-
tery is disconnected
The hybrid system may not start. In that case, try to start the sy stem again. If the
“READY” light does not come on, contact your Lexus dealer.
CAUTION
■High voltage precautions
The vehicle has high voltage DC and AC systems as well as a 12 volt system. DC
and AC high voltage is very dangerous and can cause severe burns and electric
shock that may result in death or serious injury.
●Never touch, disassemble, remove or replace the high voltage parts, cables and
their connectors.
●The hybrid system will become hot after starting as the system uses high voltage.
Be careful of both the high voltage and the high temperature, and always obey
the caution labels attached to the vehicle.
●Never try to open the service plug acce ss hole located in the luggage compart-
ment. The service plug is used only when the vehicle is serviced and is subject to
high voltage.
■Nickel-metal hydride battery
Your vehicle contains a sealed nickel-metal hydride battery. If disposed of improp-
erly, it is hazardous to the environment and there is a risk of severe burns and elec-
trical shock that may result in death or serious injury.
■Emergency shut off system
●Carefully check to see if there are exposed high voltage parts or cables. Never
touch the parts or cables. (
P. 5 )
●Carefully inspect the ground under the vehicle. If you find that liquid has leaked
onto the ground, the fuel system may have been damaged. Leave the vehicle as
soon as possible.

56
1-6. Refueling
Closing the fuel tank capAfter refueling, turn the fuel tank
cap clockwise until you hear a
click. The cap will revolve slightly in
the opposite direction once
released.
Hang the fuel tank cap on the
back of the fuel filler door.STEP4
■Fuel types
Use premium unleaded gasoline. (91 Octane Rating [Research Octane Number
96] or higher)
■Fuel tank capacity
Approximately 17.2 gal. (65 L, 14.3 Imp. gal.)
■Open fuel filler door warning
 P. 4 5 6

67
1-8. Safety information
1
Before drivingAirbag system components
Occupant detection system
(ECU and sensors)
Front passenger’s seat belt
buckle switch
Knee airbag
Front passenger airbag
Curtain shield airbag
Front side airbag
Side and curtain shield airbag
sensorCurtain shield airbag sensor
SRS warning light
Rear side airbag (if equipped)
Driver airbag
Driver's seat belt buckle switch
Driver's seat position sensor
“AIRBAG ON” and “AIRBAG
OFF” indicator lights
Airbag sensor assembly
Front airbag sensor
Curtain shield airbag

Can help protect primarily the head of front occupants and rear out-
board occupants.

77
1
1-8. Safety information
Before driving
Front passenger occupant classification system
Condition and operation in the front passenger occupant classification system
■Adult*1
Your vehicle is equipped with a front passenger occupant classification sys-
tem. This system detects the conditions of the front passenger seat and
activates or deactivates the devices for front passenger.
SRS warning light
“AIRBAG OFF” indicator light
“AIRBAG ON” indicator light
Front passenger’s seat belt reminder light
Indicator/
warning light “AIRBAG ON” and “AIRBAG OFF”
indicator lights “A I R B A G
ON”
SRS warning light Off
Front passenger’s seat belt reminder light Flashing
*2
DevicesFront passenger airbag and knee airbag
Activated
Side airbag in the front passenger seat
Curtain shield airbag
on the front passenger side
Front passenger’s seat belt pretensioner

78
1-8. Safety information
■Child*3 or child restraint system*4
■Unoccupied
Indicator/
warning light “AIRBAG ON” and “AIRBAG OFF”
indicator lights “A I R B A G
OFF”*5
SRS warning light Off
Front passenger’s seat belt reminder light Flashing
*2
DevicesFront passenger airbag and knee airbag
Deactivated
Side airbag in the front passenger seat
Curtain shield airbag
on the front passenger side Activated
Front passenger’s seat belt pretensioner
Indicator/
warning light “AIRBAG ON” and “AIRBAG OFF”
indicator lights Not illumi-
nated
SRS warning light Off
Front passenger’s seat belt reminder light
Devices Front passenger airbag and knee airbag
Deactivated
Side airbag in the front passenger seat
Curtain shield airbag
on the front passenger side Activated
Front passenger’s seat belt pretensioner Deactivated

79
1-8. Safety information
1
Before driving
■System malfunction
*
1: The system judges a person of adult size as an adult. When a smaller adult sits in the front passenger seat, the system may recognize him/
her as a child depending on his/her physique and posture.
*
2: In the event the front passenger does not wear a seat belt.
*3: When a large child who has outgrown a child restraint system sits in the front passenger seat, the sys tem may recognize him/her as an
adult depending on his/her physique and posture.
*
4: Never install a rear-facing child restraint system on the front passen- ger seat. A forward-facing child restraint system should only be
installed on the front passenger seat when it is unavoidable. 
( P. 8 2 )
*
5: In case the indicator is not illum inated, consult this manual as for
installing the child restraint system properly. ( P. 8 5 )
Indicator/
warning light “AIRBAG ON” and “AIRBAG OFF”
indicator lights “A I R B A G
OFF”
SRS warning light On
Front passenger’s seat belt reminder light Off
Devices Front passenger airbag and knee airbag
Deactivated
Side airbag in the front passenger seat
Curtain shield airbag
on the front passenger side Activated
Front passenger’s seat belt pretensioner

81
1-8. Safety information
1
Before driving
CAUTION
■Front passenger occupant classification system precautions
●If an adult sits in the front passenger se at, the “AIRBAG ON” indicator light is illu-
iminated. If the “AIRBAG OFF” indicator is illuminated, ask th e passenger to sit
up straight, well back in the seat, feet on the floor, and with the seat belt worn cor-
rectly. If the “AIRBAG OFF” indicator still remain illuminated, either ask the pas-
senger to move to the rear seat, or if th at is not possible, move the front passenger
seat fully rearward.
●When it is unavoidable to install a forw ard-facing child restraint system on the
front passenger seat, install the child rest raint system on the front passenger seat
in the proper order. ( P. 8 5 )
●Do not remove the front seat.
●Do not kick the front passenger seat or subject it to severe impact. Otherwise,
the SRS warning light may come on to indicate a malfunction in the detection sys-
tem. In this case, contact your Lexus dealer immediately.
●Do not use a seat accessory, such as a cushion or seat cover, that covers the seat
cushion surface.
●Child restraint systems installed on the rear seat should not contact the front seat-
backs.

When driving2
95
2-1. Driving procedures .................. 96Driving the vehicle ....................... 96
Starting the hybrid system ...... 103
Transmission ................................. 106
Turn signal lever ........................... 110
Parking brake .................................. 111
2-2. Instrument cluster.................... 112 Gauges and meters .................... 112
Indicators and warning 
lights................................................ 116
Multi-information display.......... 119 2-3. Operating the lights and

windshield wipers................. 122
Headlight switch.......................... 122
Fog light switch ........................... 125
Windshield wipers and 
washer .......................................... 126
Headlight cleaner switch ........ 128
2-4. Using other driving 
systems .................................... 129
Cruise control .............................. 129
Dynamic radar cruise 
control ......................................... 132
Intuitive parking assist ................ 141
Rear view monitor system ...... 160
AVS (Adaptive Variable 
Suspension System) ............... 163
Driving assist systems............... 164
PCS (Pre-Collision 
System)......................................... 169
2-5. Driving information................ 172 Cargo and luggage.................... 172
Vehicle load limits ....................... 175
Winter driving tips ...................... 176
Trailer towing.................................. 181
Dinghy towing ............................. 182