Lexus GX460 2010 Scheduled Maintenance Guide / LEXUS 2010 GX460 OWNERS MANUAL (OM60E69U)

730
5-2. Steps to take in an emergency
GX460_U.S.A. (OM60E69U)
■When assembling the jack handle extension
Make sure the hollow meets the bolt on every joint when you tighten the bolts.
Jack handle extension:
Use the jack handle to tighten the bolts on the
joints as shown.
Jack handle: 
Use a Phillips-head screwdriver to tighten the
bolt on the joints as shown.

5
When trouble arises
731
5-2. Steps to take in an emergency
GX460_U.S.A. (OM60E69U)
CAUTION
■Using the tire jack
Improper use of the tire jack may lead to death or injuries due to the vehicle sud-
denly falling off the jack.
●Do not use the tire jack for any purpose other than replacing tires or installing and
removing tire chains.
●Only use the tire jack that comes with this vehicle for replacing a flat tire. 
Do not use it on other vehicles, and do no t use other tire jacks for replacing tires
on this vehicle.
●Always check that the tire jack is securely set to the jack point.
●Be sure to turn off the rear height co ntrol air suspension and stop the engine.
●Do not raise the vehicle while someone is in it.
●When raising the vehicle, do not put an object on or under the jack.
●Do not raise the vehicle to a height greate r than that required to replace the tire.
●Use a jack stand if it is necessary to get under the vehicle.
●Do not put any part of your body under the vehicle supported by a jack.
●Do not start or run the engine while your vehicle is supported by the jack.
Take particular care when lowering the vehicle to ensure that no one working on or
near the vehicle may be injured.
■Using the jack handle
Tighten all the jack handle bolts securely using a Phillips-head screwdriver, to pre-
vent the extension parts from coming apart unexpectedly.

732
5-2. Steps to take in an emergency
GX460_U.S.A. (OM60E69U)
CAUTION
■Replacing a flat tire
Observe the following precautions to reduce the risk of death or serious injury.
●Do not touch the disc wheels or the area around the brakes immediately after the
vehicle has been driven.
After the vehicle has been driven the disc wheels and the area around the brakes
will be extremely hot. Touching these areas with hands, feet or other body parts
while changing a tire, etc. may result in burns.
●Lower the spare tire completely to the ground before removing it from under the
vehicle.
●Do not try to remove the wheel ornament by hand. Take due care in handling the
ornament to avoid unexpected personal injury.
●Never use oil or grease on the wheel bolts or wheel nuts. 
The oil or grease can cause the wheel nuts to loosen, causing a serious accident.
Remove any oil or grease on the wheel bolts or wheel nuts.
●Have the wheel nuts tightened with a torq ue wrench to 83 ft•lbf (112 N•m, 11.5
kgf•m) as soon as possible after changing wheels. 
Failure to follow these precautions could cause the nuts to loosen and the wheels
may fall off, which could lead to an accident causing death or serious injury.
●Do not attach a heavily damaged wheel orna ment, as it may fly off the wheel while
the vehicle is moving.
●When installing a tire, only use wheel nuts that have been specifically designed
for that wheel.
●If there are any cracks or deformations in the bolt screws, nut threads or bolt
holes of the wheel, have the vehicle inspected by your Lexus dealer.
Failure to follow these precautions could cause the wheel nuts to loosen and the tire
to fall off, resulting in death or serious injury.

5
When trouble arises
733
5-2. Steps to take in an emergency
GX460_U.S.A. (OM60E69U)
CAUTION
■After using the tools and jack
Before driving, make sure all the tools and jack are securely in place in their storage
location to reduce the possibility of personal injury during a collision or sudden
braking.
NOTICE
■Do not drive the vehicle with a flat tire
Do not continue driving with a flat tire. 
Driving even a short distance with a flat tire can damage the tire and the wheel
beyond repair.
■When stowing the flat tire
●Ensure that there is no object caught between the tire and the vehicle underbody.
●To avoid damaging the suspension system, make sure that the spare tire does not
interfere with the suspension components when stowed.
■When replacing the tires
When removing or fitting the wheels, tire s or the tire pressure warning valve and
transmitter, contact your Lexus dealer as the tire pressure warning valve and trans-
mitter may be damaged if not handled correctly.
■To avoid damaging the tire pressu re warning valves and transmitters
Do not use liquid sealants on flat tires.

734
5-2. Steps to take in an emergency
GX460_U.S.A. (OM60E69U)
If the engine will not start
If the engine will not start even though correct starting procedures are
being followed (
P. 179), consider each of the following points:
■The engine will not start even wh en 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. 
Refuel the vehicle.
● The engine may be flooded. 
Try to restart the engine once more following correct starting
procedures. ( P. 1 7 9 )
● There may be a malfunction in the engine immobilizer system. 
( P. 1 1 4 )
■ 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. 74 1 )
● The battery terminal connections may be loose or corroded.
■ The starter motor does not turn over
The engine starting system may be malfunctioning due to an electri-
cal problem such as an open circuit or a blown fuse. However, an
interim measure is available to start the engine. ( P. 7 3 8 )

5
When trouble arises
735
5-2. Steps to take in an emergency
GX460_U.S.A. (OM60E69U)
Emergency start function
When the engine does not start, the following steps can be used as an
interim measure to start the engine if the “ENGINE START STOP” switch
is functioning normally:
Set the parking brake.
Shift the shift lever to P.
Turn the “ENGINE START STOP” switch to ACCESSORY
mode.
Press and hold the “ENGINE START STOP” switch for about 15
seconds while depressing the brake pedal firmly.
Even if the engine can be started using the above steps, the system may
be malfunctioning. Have the vehicle inspected by your Lexus dealer.
■ The starter motor does not turn over, 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. 74 1 )
● There may be a malfunction in the steering lock system.
Contact your Lexus dealer if the problem cannot be repaired, or if
repair procedures are unknown.
STEP1
STEP2
STEP3
STEP4

736
5-2. Steps to take in an emergency
GX460_U.S.A. (OM60E69U)
If the shift lever cannot be shifted from P
If the shift lever cannot be shifted with your foot on the brake, there may be
a problem with the shift lock system (a system to prevent accidental opera-
tion of the shift lever). Have the vehicle inspected by your Lexus dealer
immediately. 
The following steps may be used as an emergency measure to ensure that
the shift lever can be shifted:
Set the parking brake.
Turn the “ENGINE START STOP” switch to ACCESSORY
mode.
Depress the brake pedal.
Pry the cover up with a flathead
screwdriver or tool.
Press the shift lock override but-
ton.
The shift lever can be shifted
while the button is pressed.
STEP1
STEP2
STEP3
STEP4
STEP5

5
When trouble arises
737
5-2. Steps to take in an emergency
GX460_U.S.A. (OM60E69U)
If you lose your keys
New genuine Lexus keys can be made by your Lexus dealer using the other
key and the key number stamped on your key number plate.

738
5-2. Steps to take in an emergency
GX460_U.S.A. (OM60E69U)
If the electronic key does not operate properly
Locking and unlocking the doors and key linked functions
Use the mechanical key (P. 2 6 )
in order to perform the following
operations (driver’s door only):
Locks all the doors
Closes the windows and moon
roof (turn and hold)
*
Unlocks the door
Turning the key rearward unlocks
the driver’s door. Turning the key
once again unlocks the other
doors.
Opens the windows and moon
roof (turn and hold)
*
*
: This setting must be customized at your Lexus dealer.
If communication between the electron ic key and vehicle is interrupted
(  P. 40) or the electronic key cannot be used because the battery is
depleted, the smart access system with push-button start and wireless
remote control cannot be used. In such cases, the doors can be opened or
the engine can be started by following the procedure below.

5
When trouble arises
739
5-2. Steps to take in an emergency
GX460_U.S.A. (OM60E69U)
Changing “ENGINE START STOP” switch modes and starting the engine
Ensure that the shift lever is in P and depress the brake pedal.Touch the Lexus emblem side of
the electronic key to the
“ENGINE START STOP” switch.
If any of the doors is opened or
closed while the key is being
touched to the switch, an alarm will
sound to indicate that the start
function cannot detect the elec-
tronic key.
To change “ENGINE START STOP” switch modes: Within 10
seconds of the buzzer sounding , release the brake pedal and
press the “ENGINE START STOP” switch. Modes can be
changed each time the switch is pressed. ( P. 1 8 1 )
To start the engine: Press th e “ENGINE START STOP” switch
within 10 seconds of the buzz er sounding, keeping the brake
pedal depressed.
In the event that the “ENGINE START STOP” switch still cannot be oper-
ated, contact your Lexus dealer.
STEP1
STEP2
STEP3