Heat Lexus GS460 2008 Scheduled Maintenace Guide / LEXUS 2008 GS460/350 (OM30A87U) Owner's Guide

462
4-3. Do-it-yourself maintenance
GS_G_U
May 13, 2008 5:14 pm
FuseAmpereCircuit
9IGN10
Multi-port fuel injection system/
sequential multiport fuel injection
system, SRS airbag system, stop/tail
lights, steering lock system, electroni-
cally controlled brake system, Lexus
link system ECU, occupant classifica-
tion system ECU
10ACC7. 5
Multiplex communication system,
smart access system with push-but-
ton start, rear view monitor system,
audio system, air conditioning system,
Lexus link system ECU
11CIG15Cigarette lighter
12PWR OUTLET15Po w e r o u t l e t
13AIR SUS20Adaptive variable suspension system
14RR DOOR RH20
Rear right door control system
(power door lock system, door cour-
tesy light, power window)
15FR DOOR RH20
Front right door control system
(power door lock system, power rear
view mirror control system, door
courtesy light, outside rear view mir-
ror heater, power window), multiplex
communication system

463
4-3. Do-it-yourself maintenance
4
Maintenance and care
GS_G_U
May 13, 2008 5:14 pm
FuseAmpereCircuit
16AM27. 5Starting system
17RH-IG7. 5
Seat heater switches, front right door
control system, rear right door con-
trol system, capacitor, combination
switch, seat belt pretensioners, shift
lever switch, power window
18FR S/HTR RH15Seat heaters and ventilators
19ECU-IG RH10
Tilt and telescopic steering, combina-
tion switch, multiplex communication
system, power seat, smart entry &
start system, air conditioning system,
audio system, shift lock system

475
4-3. Do-it-yourself maintenance
4
Maintenance and care
GS_G_U
May 13, 2008 5:14 pm
CAUTION
■Replacing light bulbs
●Turn off the headlights. Do not attempt to replace the bulb immediately after turn-
ing off the headlights. 
The bulbs become very hot and may cause burns.
●Do not touch the glass portion of the light bulb with bare hands. Hold the bulb by
the plastic or metal portion. 
If the bulb is scratched or dropped it may blow out or crack.
●Fully install light bulbs and any parts used to secure them. Failing to do so may
result in heat damage, fire, or water ente ring the headlight unit. This may damage
the headlights or cause condensation to build up on the lens.
●Do not attempt to take apart or repair the low beam discharge headlight bulbs,
connectors, power supply circuits, or related components. 
Doing so could result in electric shock and death or serious injury.
■High-intensity discharge (HID) headlights
●Contact your Lexus dealer before replac ing high-intensity discharge headlights
(including light bulbs).
●Do not touch the high-intensity discharge headlight’s high voltage socket when
the headlights are turned on. 
An extremely high voltage of 20000 V wi ll be discharged and could result in
death or serious injury by electric shock.
■To prevent damage or fire
Make sure bulbs are fully seated and locked.

When trouble arises5
477
GS_G_U
May 13, 2008 5:14 pm
5-1. Essential information..... 478If your vehicle needs 
to be towed ............................ 478
If you think something is  wrong ..................................... 484
Fuel pump shut off 
system .................................... 485
Event data recorder .............. 486 5-2. Steps to take in an

emergency ................... 488
If a warning light turns on or a 
warning buzzer sounds... .. 488
If a warning message is 
displayed................................. 497
If you have a flat tire (Vehicles 
with standard tires) .............. 512
If you have a flat tire (Vehicles 
with run-flat tires)................ 522
If the engine will not start .... 523
If the shift lever cannot be 
shifted from “P”.................... 524
If you lose your keys .............. 525
If the electronic key does 
not operate properly.......... 526
If the 12 volt battery is 
discharged ............................ 529
If your vehicle overheats ..... 533
If the vehicle becomes 
stuck........................................ 536

5
When trouble arises
495
5-2. Steps to take in an emergency
GS_G_U
May 13, 2008 5:14 pm
CAUTION
■Maintenance of the tires
Each tire, including the spare (if provided), should be checked monthly when cold
and inflated to the inflation pressure re commended by the vehicle manufacturer on
the vehicle placard or tire inflation pressure label (tire and load information label).
(If your vehicle has tires of a different size than the size indicated on the vehicle
placard or tire inflation pressure label [tire and load information label], you should
determine the proper tire inflation pressure for those tires.)
As an added safety feature, your vehicle has been equipped with a tire pressure
monitoring system (TPMS-tire pressure warning system) that illuminates a low tire
pressure telltale (tire pressure warning light) when one or more of your tires is sig-
nificantly under-inflated. Accordingly, when the low tire pressure telltale (tire pres-
sure warning light) illuminates, you should stop and check your tires as soon as
possible, and inflate them to the proper pressure. Driving on a significantly under-
inflated tire causes the tire to overheat an d can lead to tire failure. Under-inflation
also reduces fuel efficiency and tire tread life, and may affect the vehicle’s handling
and stopping ability.
Please note that the TPMS (tire pressure warning system) is not a substitute for
proper tire maintenance, and it is the driver’s responsibility to maintain correct tire
pressure, even if under-inflation has not reached the level to trigger illumination of
the TPMS low tire pressure telltale (tire pressure warning light).
Your vehicle has also been equipped with a TPMS (tire pressure warning system)
malfunction indicator to indicate when th e system is not operating properly. The
TPMS (tire pressure warning system) malf unction indicator is combined with the
low tire pressure telltale (tire pressure warning light). When the system detects a
malfunction, the telltale will flash for approximately one minute and then remain
continuously illuminated. This sequence will continue upon subsequent vehicle
start-ups as long as the malfunction exists . When the malfunction indicator is illumi-
nated, the system may not be able to detect or signal low tire pressure as intended.
TPMS (tire pressure warning system) malfunctions may occur for a variety of rea-
sons, including the installation of replacem ent or alternate tires or wheels on the
vehicle that prevent the TPMS (tire pressure warning system) from functioning
properly. Always check the TPMS (tire pressure warning system) malfunction tell-
tale after replacing one or more tires or wheels on your vehicle to ensure that the
replacement or alternate tires and wheels allow the TPMS (tire pressure warning
system) to continue to function properly.

5
When trouble arises
533
5-2. Steps to take in an emergency
GS_G_U
May 13, 2008 5:14 pm
If your vehicle overheats
If your engine overheats:
Stop the vehicle in a safe place and turn off the air conditioning
system.
Check to see if steam is coming out from under the hood.
If you see steam: 
Stop the engine and car efully lift the hood.
If you do not see steam: Leave the engine running and carefully lift the hood.
Remove the engine compartment cover. ( P. 4 0 8 )
Check to see if the cooling fan is operating.
If the fan is operating: 
Wait until the engine coolant temperature gauge begins to
fall and then stop the engine.
If the fan is not operating: 
Stop the engine immediately and call your local Lexus
dealer.
After the engine has cooled
down sufficiently, check the
coolant level and inspect the
radiator core (radiator) for any
leaks.STEP1
STEP2
STEP3
STEP4
STEP5

534
5-2. Steps to take in an emergency
GS_G_U
May 13, 2008 5:14 pm
■Overheating
In the following situations, your vehicle may be overheating.
●The engine coolant temperature gauge enters the red zone or a loss of power is
experienced.
●Steam is coming from under the hood.
CAUTION
■To prevent an accident or injury when in specting under the hood of your vehicle
●Keep hands and clothing away from the fan and engine drive belt while the
engine is running.
●Do not loosen the radiator cap while the engine and radiator are hot. 
Serious injury, such as burns, may resu lt from hot coolant and steam released
under pressure.
Add coolant if necessary.
Water can be used in an emer-
gency measure if coolant is
unavailable. ( P. 5 4 6 )
Have the vehicle checked at your nearest Lexus dealer as soon as pos-
sible.
STEP6

562
6-1. Specifications
GS_G_U
May 13, 2008 5:14 pm
■Temperature A, B, C
The temperature grades are A (the highest), B, and C, representing
the tire’s resistance to the generation of heat and its ability to dissipate
heat when tested under controlled conditions on a specified indoor
laboratory test wheel.
Sustained high temperature can cause the material of the tire to degenerate
and reduce tire life, and excessive temperature can lead to sudden tire fail-
ure.
The grade C corresponds to a level of performance which all passenger car
tires must meet under the Federal Mo tor Vehicle Safety Standard No. 109.
Grades B and A represent higher levels of performance on the laboratory
test wheel than the minimum required by law.
Warning: The temperature grades for this tire are established for a tire that
is properly inflated and not overloaded. 
Excessive speed, underinflation, or excess ive loading, either separately or in
combination, can cause heat buildup and possible tire failure.
Glossary of tire terminology
Tire related termMeaning
Cold tire inflation pres-
sureTire pressure when the vehicle has been parked for
three hours or more, or has not been driven more
than 1 mile or 1.5 km under that condition
Maximum inflation pres-
sureThe maximum cold inflated pressure to which a tire
may be inflated, shown on the sidewall of the tire
Recommended inflation
pressureCold tire inflation pressure recommended by a man-
ufacturer

563
6-1. Specifications
6
Vehicle specifications
GS_G_U
May 13, 2008 5:14 pm
Tire related termMeaning
Accessory weight
The combined weight (in excess of those standard
items which may be replaced) of automatic transmis-
sion, power steering, power brakes, power windows,
power seats, radio and heater, to the extent that these
items are available as factory-installed equipment
(whether installed or not)
Curb weight
The weight of a motor vehicle with standard equip-
ment, including the maximum capacity of fuel, oil and
coolant, and if so equipped, air conditioning and
additional weight optional engine
Maximum loaded vehicle
weight
The sum of: 
(a) Curb weight 
(b) Accessory weight 
(c) Vehicle capacity weight 
(d) Production options weight
Normal occupant weight150 lb. (68 kg) times the number of occupants speci-
fied in the second column of Table 1* that follows
Occupant distributionDistribution of occupants in a vehicle as specified in
the third column of Table 1* below
Production options
weight
The combined weight of installed regular production
options weighing over 5 lb. (2.3 kg) in excess of the
standard items which they replace, not previously
considered in curb weight or accessory weight,
including heavy duty brakes, ride levelers, roof rack,
heavy duty battery, and special trim
RimA metal support for a tire or a tire and tube assembly
upon which the tire beads are seated
Rim diameter 
(Wheel diameter)Nominal diameter of the bead seat

585
Alphabetical index
GS_G_U
May 13, 2008 5:14 pm
BrakeFluid ............................................................ 416
Parking brake ..........................................131
Brake assist ............................................... 184
Care Exterior ...................................................388
Interior....................................................... 391
Seat belts ............................................... 392
Cargo capacity ....................................... 194
Cargo hooks .......................................... 360
CD player/changer .............................242
Chains....................................................... 200
Child-protectors ..................................... 38
Child restraint system Definition................................................... 98
Installation................................................ 102
Installing CRS with lower 
anchors .................................................106
Installing CRS with seatbelts .........103
Installing CRS with top straps ....... 107
Child safety Airbag precautions ............................. 87
Battery precautions ................ 419, 532
Child restraint system ........................ 98
Child-protectors................................... 38
How your child should wear 
the seatbelt ........................................... 56
Installing child restraints ................... 102
Moon roof precautions ..................... 69
Power window lock switch ..............64
Power window precautions.............64
Removed electronic key battery 
precautions ......................................... 441
Seat belt comfort guide..................... 54
Seat belt precautions...........................57 Seat heater precautions................ 355
Trunk precautions................................. 44
Cigarette lighter....................................352
Cleaning Exterior................................................... 388
Interior ...................................................... 391
Seat belts ................................................392
Clock ......................................................... 349
Coin holder .............................................345
Compass ..................................................369
Condenser ............................................... 415
Console box ........................................... 342
Cooling system Engine overheating.......................... 533
Cruise control Cruise control....................................... 150
Dynamic radar cruise control....... 153
Cup holders ............................................345
Curtain shield airbags........................... 80
Customizable features .......................569
Daytime running light system ........... 143
Defogger Rear window ........................................ 225
Side mirror............................................. 225
Dimension................................................540
Dinghy towing ........................................205
Display Multi-information display ................ 139
Touch screen ...................................... 208
Trip information ................................... 140
Warning message ............................. 497
Do-it-yourself maintenance ............ 400
Door courtesy lights ............................ 337
Door pocket............................................ 346
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