2008 Lexus GS350 check system light

5
When trouble arises
493
5-2. Steps to take in an emergency
GS_G_U
June 19, 2008 12:54 pm
■When the tire pressure warning light comes on
Check the tire inflation pressure and adjust to the appropriate level. Pushing the tire
pressure warning reset switch does not turn off the tire pressure warning light.
■If the tire pressure warning system is inoperative
The tire pressure warning system will be disabled in the following conditions:
(When the condition becomes normal, the system will work properly.)
●If tires not equipped with tire pressure warning valves and transmitters are used.
●If the ID code on the tire pressure warning valves and transmitters is not regis-
tered in the tire pressure warning computer.
●If the tire pressure warning select switch is set to a different tire setting.
●If the tire inflation pressure is 73 psi (500 kPa, 5.1 kgf/cm2 or bar) or higher.
The tire pressure warning system may be disabled in the following conditions:
(When the condition becomes normal, the system will work properly.)
●If electronic devices or facilities using similar radio wave frequencies are nearby.
●If a radio set at similar frequencies is in use in the vehicle.
●If a window tint that affects the radio wave signals is installed.
●If there is a lot of snow or ice on the vehicle, in particular around the wheels or
wheel housings.
●If non-genuine Lexus wheels are used. (Even if you use Lexus wheels, the tire
pressure warning system may not work properly with some types of tires.)
●If tire chains are used.
■The tire pressure warning light may turn on due to natural causes
The tire pressure warning light may turn on due to natural causes such as natural air
leaks or tire inflation pressure changes caused by temperature. In this case, adjust-
ing the tire inflation pressure will turn off the warning light (after a few minutes).
■When a tire is replaced with a spare tire
The compact spare tire is not equipped with the tire pressure warning valve and
transmitter. If a tire goes flat, the tire pressure warning light will not turn off even
though the flat tire is replaced with the spare tire. Replace the spare tire with the
repaired tire and adjust the proper tire inflation pressure. The tire pressure warning
light will turn off after a few minutes.
GS_U_G.book Page 493 Thursday, June 19, 2008 12:54 PM

494
5-2. Steps to take in an emergency
GS_G_U
June 19, 2008 12:54 pm
CAUTION
■If the tire pressure warning light comes on
Be sure to observe the following precautions. Failure to do so could cause loss of
vehicle control and result in death or serious injury.
●Vehicles with standard tires:
• Stop your vehicle in a safe place as soon as possible. Adjust the tire inflationpressure immediately.
• If the tire pressure warning light comes on even after tire inflation pressure adjustment, it is probable that you have a flat tire. Check the tires. If the tire is
flat, change to the spare tire and have the flat tire repaired by the nearest
Lexus dealer.
• Avoid abrupt maneuvering and braking. If the vehicle tires deteriorate, you could lose control of the steering wheel or the brakes.
●Vehicles with run-flat tires:
• Decelerate to the lowest appropriate speed as soon as possible. Do not driveover 55 mph (90 km/h).
• Check and adjust the tire inflation pressure immediately.
• If the tire pressure warning light comes on even after tire inflation pressure adjustment, it is probable that you have a flat tire. Have the tire replaced by
the nearest Lexus dealer.
• Avoid abrupt maneuvering and braking. If the vehicle tires deteriorate, you could lose control of the steering wheel or the brakes.
■If a blowout or sudden air leakage should occur
The tire pressure warning system may not activate immediately.
GS_U_G.book Page 494 Thursday, June 19, 2008 12:54 PM

5
When trouble arises
495
5-2. Steps to take in an emergency
GS_G_U
June 19, 2008 12:54 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 recommended 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 and 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 the system is not operating properly. The
TPMS (tire pressure warning system) malfunction 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 replacement 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.
GS_U_G.book Page 495 Thursday, June 19, 2008 12:54 PM

5
When trouble arises
531
5-2. Steps to take in an emergency
GS_G_U
June 19, 2008 12:54 pm
■Starting the engine when the 12 volt battery is discharged
The engine cannot be started by push-starting.
■To prevent 12 volt battery discharge
●Turn off the headlights and the audio system while the engine is turned off.
●Turn off any unnecessary electrical components when the vehicle is running at a
low speed for an extended period, such as in heavy traffic, etc.
■When the 12 volt battery is removed or discharged
The following systems must be initialized.
●Tire pressure warning system (→P. 422)
●Intuitive parking assist (→P. 5 0 7 )
CAUTION
■Avoiding battery fires or explosions
Observe the following precautions to prevent accidentally igniting the flammable
gas that may be emitted from the battery.
●Make sure the jumper cable is connected to the correct terminal and that it is not
unintentionally in contact with any part other than the intended terminal.
●Do not allow the jumper cables to come into contact with the “+” and “-” termi-
nals.
●Do not allow open flame or use matches, cigarette lighters or smoke near the
battery.
Maintain the engine speed on the second vehicle and turn the
“ENGINE START STOP” switch to the IGNITION ON mode,
then start the vehicle’s engine.
Once the vehicle’s engine has started, remove the jumper
cables in the exact reverse order in which they were con-
nected.
Once the engine starts, have the vehicle checked at your Lexus dealer
as soon as possible.STEP5
STEP6
GS_U_G.book Page 531 Thursday, June 19, 2008 12:54 PM

547
6-1. Specifications
6
Vehicle specifications
GS_G_U
June 19, 2008 12:54 pm
Electrical system
Differential
Rear differential: “Toyota Genuine Differential Gear Oil” is filled in your
Lexus vehicle at factory fill. Use Lexus approved “Toyota Genuine Differen-
tial Gear Oil” or an equivalent of matching quality to satisfy the above spec-
ification. Please contact your Lexus dealer for further details.
12 volt battery
Open voltage at
68 °F (20 °C):12.6  12.8V Fully charged
12.2  12.4V Half charged
11.8  12.0V Discharged
(Voltage is checked 20 minutes after
the engine and all lights are turned off.)
Charging rates5A max.
GS460/
GS350 (2WD)GS350 (4WD)
FrontRear
Oil capacity1.42 qt.
(1.35 L, 1.19 Imp.qt.)0.73 qt.
(0.70 L, 0.61 Imp.qt.)1.42 qt.
(1.35 L, 1.19 Imp.qt.)
Oil type and
viscosity
To y o t a G e n u i n e D i f -
ferential Gear Oil LT
75W-85 GL-5 or
equivalent
Hypoid gear oil API
GL-5
Above 0°F (-18°C):
SAE 90
Below 0°F (-18°C):
SAE 80W or SAE
80W-90
To y o t a G e n u i n e D i f -
ferential Gear Oil LT
75W-85 GL-5 or
equivalent
GS_U_G.book Page 547 Thursday, June 19, 2008 12:54 PM

584
GS_G_U
June 19, 2008 12:54 pm
Alphabetical index
Alphabetical index
A/C ..............................................................217
ABS.............................................................. 184
ACCESSORY mode .......................... 122
Active stabilizer suspension system...................................................... 184
Adaptive variable
suspension system ............................. 183
Air conditioning system
Air conditioning filter ....................... 437
Automatic air conditioning system .................................................... 217
Airbags
Airbag operating conditions........... 83
Airbag precautions for your child............................................... 87
Airbag warning light ........................489
Curtain shield airbag precautions .......................................... 90
General airbag precautions ........... 87
Locations of airbags............................80
Modification and disposal of airbags ...................................................... 91
Proper driving posture ...................... 78
Side airbag precautions .................... 87
Side and curtain shield airbags operating conditions ....................... 83
SRS airbags .............................................80
Alarm ............................................................ 75
Antenna ....................................................235
Anti-lock brake system ....................... 184
Armrest.....................................................356
Ashtrays ..................................................... 351 Audio system
Antenna.................................................. 235
AUX adapter .......................................287
Cassette player .................................. 238
CD player/changer .......................... 242
DVD information ...............................270
DVD player/changer ....................... 251
DVD video/audio............................. 254
MP3/WMA disc................................ 247
Optimal use ......................................... 282
Radio ........................................................229
Steering switches .............................. 288
Video CD ............................................. 266
Automatic headlight leveling
system ......................................................144
Automatic light control system.........142
Automatic transmission If the shift lever cannot be
shifted from “P” ............................... 524
Mode select switch ............................ 126
S mode ......................................................127
AUX adapter ......................................... 287
Back-up lights
Wattage ................................................. 552
Battery
12 volt battery ........................................ 417
Checking................................................. 417
If the 12 volt battery is discharged ........................................ 529
Preparing and checking before winter...................................... 199
Bluetooth
®.............................................. 296
A
B
GS_U_G.book Page 584 Thursday, June 19, 2008 12:54 PM

590
Alphabetical index
GS_G_U
June 19, 2008 12:54 pm
Smart access system with push-button start
Antenna location....................................24
Entry function...........................................22
Starting the engine ................................ 121
Spare tire
Inflation pressure............................... 550
Spare tire..................................................513
Spark plug ................................................546
Specifications ........................................ 540
Speedometer........................................... 132
Steering wheel Adjustment............................................... 60
Audio switches ...................................288
Steering wheel position memory...................................................47
Storage compartment ........................ 344
Storage feature......................................340
Stuck If your vehicle becomes stuck.....536
Sun visors ................................................. 347
Switch “ENGINE START STOP” switch ....................................................... 121
Fog light switch.....................................145
Ignition switch..........................................121
Light switches ........................................ 142
Mode select switch............................. 126
Power door lock switch .....................37
Power window switch ........................ 64
Tire pressure warning reset switch ....................................... 422
Tire pressure warning select switch ................... 424
Window lock switch ........................... 64
Wipers and washer switch ............. 146 Tachometer ..............................................132
Tail lights
Switch ........................................................ 142
Theft deterrent system
Alarm...........................................................75
Immobilizer system .............................. 73
Theft prevention labels...........................77
Tire inflation pressure .........................550
Tire information Glossary ................................................ 562
Size ........................................................... 559
Tire identification number .............558
Uniform Tire Quality Grading ... 560
Tires
Chains..................................................... 200
Checking................................................. 421
Compact spare tire............................ 513
If you have a flat tire ............... 512, 522
Inflation pressure ...............................550
Information ........................................... 556
Replacing ................................................ 512
Rotating tires.......................................... 421
Size ........................................................... 550
Snow tires.............................................. 202
Tire pressure warning system....... 421
Tools.............................................................512
Total load capacity ................................ 198
Touch screen..........................................208
Towing Dinghy towing .................................... 205
Emergency towing ........................... 478
Trailer towing ...................................... 204
Traction control...................................... 184
Trip meter ..................................................132T
GS_U_G.book Page 590 Thursday, June 19, 2008 12:54 PM