2010 Lexus GS450h warning

96
1-6. Refueling
GS_HV_U (OM30C81U)
January 28, 2010 10:42 am
■Fuel types
Use premium unleaded gasoline. (Octane Rating 91 [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. 5 5 4
■When the fuel filler door opener switch is inoperable
If the fuel filler door opener switch is inopera-
ble, contact your Lexus dealer to service the
vehicle. If you must refuel your vehicle, you
can open the fuel filler door manually as
shown. The system to lower internal pressure
may not be functioning so you must turn the
cap slowly as the pressure releases. In addi-
tion, fuel may spill out during refueling. Fill the
fuel tank carefully and slowly.

108
1-8. Safety information
GS_HV_U (OM30C81U)
January 28, 2010 10:42 am
Airbag 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 and rear side
airbag sensor
SRS warning light
Rear side airbag (if equipped)
Driver airbag
Driver’s seat belt buckle switch
Driver’s seat position sensor
“A I R B A G O N ” a n d “A I R B A G
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.

119
1
1-8. Safety information
Before driving
GS_HV_U (OM30C81U)
January 28, 2010 10:42 am
Front passenger occupant classification system
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
“AIR BAG OFF” indicator light
“AIR BAG ON” indicator light
Front passenger’s seat belt reminder light

120
1-8. Safety information
GS_HV_U (OM30C81U)
January 28, 2010 10:42 am
Condition and operation in the front passenger occupant classification system
■Adult*1
■Child*3 or child restraint system*4
Indicator/
warning light“AIR BAG ON” and “AIR BAG 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
Indicator/
warning light“AIR BAG ON” and “AIR BAG 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

121
1-8. Safety information
1
Before driving
GS_HV_U (OM30C81U)
January 28, 2010 10:42 am
■Unoccupied
■System malfunction
Indicator/
warning light“AIR BAG ON” and “AIR BAG OFF”
indicator lightsNot illumi-
nated
SRS warning light
Off
Front passenger’s seat belt reminder light
DevicesFront passenger airbag and knee airbag
Deactivated
Side airbag in the front passenger seat
Curtain shield airbag
on the front passenger sideActivated
Front passenger’s seat belt pretensioner Deactivated
Indicator/
warning light“AIR BAG ON” and “AIR BAG OFF”
indicator lights“A I R B A G
OFF”
SRS warning light On
Front passenger’s seat belt reminder light Off
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

123
1-8. Safety information
1
Before driving
GS_HV_U (OM30C81U)
January 28, 2010 10:42 am
CAUTION
■Front passenger occupant classification system precautions
●Do not apply a heavy load to the front passenger seat or equipment.
●Do not put weight on the front passenger seat by putting your hands or feet on
the front passenger seat seatback from the rear seat.
●Do not let a rear seat passenger lift the front passenger seat with their feet or
press on the seatback with their legs.
●Do not put objects under the front passenger seat.
●Do not recline the front passenger seatback so far that it touches a rear seat. This
may cause the “AIR BAG OFF” indicator light to be illuminated, which indicates
that the passenger’s airbags will not deploy in the event of a severe accident. If the
seatback touches the rear seat, return the seatback to a position where it does
not touch the rear seat. Keep the front passenger seatback as upright as possible
when the vehicle is moving. Reclining the seatback excessively may lessen the
effectiveness of the seat belt system.
●If an adult sits in the front passenger seat, the “AIR BAG ON” indicator light is illu-
minated. If the “AIR BAG OFF” indicator is illuminated, ask the passenger to sit
up straight, well back in the seat, feet on the floor, and with the seat belt worn cor-
rectly. If the “AIR BAG OFF” indicator still remains illuminated, either ask the pas-
senger to move to the rear seat, or if that is not possible, move the front passenger
seat fully rearward.
●When it is unavoidable to install a forward-facing child restraint system on the
front passenger seat, install the child restraint system on the front passenger seat
in the proper order. (P. 1 2 8 )
●Do not modify or 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
139
GS_HV_U (OM30C81U)
January 28, 2010 11:27 am
2-1. Driving procedures
Driving the vehicle.................. 140
Power (ignition) switch .......... 150
Transmission.............................. 154
Turn signal lever ....................... 158
Parking brake ........................... 159
Horn ............................................ 160
2-2. Instrument cluster
Gauges and meters ................. 161
Indicators and warning 
lights ......................................... 165
Multi-information display ..... 1682-3. Operating the lights and 
windshield wipers
Headlight switch ....................... 171
Fog light switch ......................... 174
Windshield wipers and 
washer ...................................... 175
Headlight cleaner switch ..... 180
2-4. Using other driving systems
Cruise control........................... 181
Dynamic radar cruise 
control ..................................... 185
Intuitive parking assist ............ 197
Rear view monitor system .... 210
AVS (Adaptive Variable 
Suspension System) ............ 213
Driving assist systems ............ 214
PCS 
(Pre-Collision System) ....... 221
2-5. Driving information
Cargo and luggage ............... 228
Vehicle load limits .................. 232
Winter driving tips ................. 233
Trailer towing .......................... 238
Dinghy towing......................... 239

157
2-1. Driving procedures
2
When driving
GS_HV_U (OM30C81U)
October 13, 2015 12:41 pm
■Downshifting restrictions warning buzzer (in the “S” mode)
To help ensure safety and driving performance, downshifting operation may some-
times be restricted. In some circumstances, downshifting may not be possible even
when the shift lever is operated. (The warning buzzer will sound twice.)
■When driving with the cruise control system (or dynamic radar cruise control sys-
tem)
The engine brake will not operate in the “S” mode, even when downshifting to “5” or
“4”. (P. 1 8 1P. 1 8 4 )
■Snow mode automatic deactivation
Snow mode is automatically deactivated if the “POWER” switch is turned to
ACCESSORY or ON mode after driving in snow mode.
■If the shift lever cannot be shifted from “P”
P. 5 7 3
■If the indicator does not come on even after shifting the shift lever to “S”
This may indicate a malfunction in the transmission. Have the vehicle inspected by
your Lexus dealer immediately. 
(In this situation, the vehicle will operate as if the shift lever is in “D”.)
■When in heavy traffic
To avoid running the hybrid battery (traction battery) down, leave the shift lever in
“D” or “S”.