2008 Lexus GX470 light

5
When trouble arises
389
5-2. Steps to take in an emergency
CAUTION
■If a blowout or sudden air leakage should occur
The tire pressure warning system may not activate immediately.
■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).

390
5-2. Steps to take in an emergency
CAUTION
■Maintenance of the tires
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.
NOTICE
■Precaution when installing a different tire
When a tire of a different specification or maker is installed, the tire pressure warn-
ing system may not operate properly.

5
When trouble arises
395
5-2. Steps to take in an emergency
Remove the wheel ornament using
the wheel nut wrench as shown.
Slightly loosen the wheel nuts (one
turn).
Turn the tire jack portion “A” by
hand until the head of the jack is in
contact with the appropriate jack
point.Front (vehicles without kinetic
dynamic suspension)
Front (vehicles with kinetic
dynamic suspension)
RearSTEP2
STEP3
STEP4

396
5-2. Steps to take in an emergency
Attach the hooked jack handle end
to the jack handle extension as
shown.
Raise the vehicle until the tire is
slightly raised off the ground.
Remove all the wheel nuts and the
tire.
When resting the tire on the
ground, place the tire so that the
wheel design faces up to avoid
scratching the wheel surface.
STEP5
STEP6
STEP7

402
5-2. Steps to take in an emergency
If the engine will not start
If the engine will not start even though correct starting procedures are
being followed (
→P. 118), consider each of the following points.
■The engine will not start even when the starter motor operates
normally
One of the following may be the cause of the problem.
●There may not be sufficient fuel in the vehicle’s tank.
Add fuel to the vehicle.
● The engine may be flooded.
Try to restart the engine once more following correct starting
procedures. ( →P. 1 1 8 )
● There may be a malfunction in the engine immobilizer system.
(→ P. 7 0 )
■ The starter motor turns over slowly, 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 battery may be discharged. ( →P. 405)
● The battery terminal connections may be loose or corroded.
■ The starter motor does not turn ov er, 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 battery terminals may be disconnected.
● The battery may be discharged. ( →P. 405)
Contact your Lexus dealer if the problem cannot be repaired, or if
repair procedures are unknown.

5
When trouble arises
405
5-2. Steps to take in an emergency
If the vehicle battery is discharged
The following procedures may be used to start the engine if the vehicle’s
battery is discharged.
You can call your Lexus dealer, or qualified repair shop.
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 by following the
steps below.
Open the hood.
Connecting the jumper cables. If required, remove all vent plugs from the booster battery. Lay a
cloth over the open vents on the booster battery. (This helps reduce
the chance of explosion, 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.
Maintain the engine speed of the second vehicle and start your
vehicle’s engine.
STEP1
STEP2
STEP3
STEP4

406
5-2. Steps to take in an emergency
■To prevent battery discharge
●Turn off the headlights and the audio system while the engine is 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 battery is removed or discharged
The power windows and moon roof must be initialized.
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.
Once your 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

417
6-1. Specifications
6
Vehicle specifications
Electrical system
Differential
“Toyota Genuine Differential Gear Oil” is filled in your Lexus vehicle at fac-
tory fill. Use Lexus approved “Toyota Genuine Differential Gear Oil” or an
equivalent of matching quality to satisfy the above specification. Please con-
tact your Lexus dealer for further details.
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 key is removed with all the lights
turned off.)
Charging rates5A max.
Oil capacity
Front
Rear1.5 qt. (1.4 L, 1.2 Imp.qt.)
3.3 qt. (3.1 L, 2.7 Imp.qt.)
Oil type and viscosity
Toyota Genuine Differential
Gear Oil LT 75W-85 GL5 or equiva-
lent