2010 Lexus GX460 warning

633
4-3. Do-it-yourself maintenance
4
Maintenance and care
GX460_U.S.A. (OM60E69U)
NOTICE
■Repairing or replacing tires, wheels and tire pressure warning valves and trans-
mitters
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.
■Driving on rough roads
Take particular care when driving on roads with loose surfaces or potholes. 
These conditions may cause losses in tire inflation pressure, reducing the cushion-
ing ability of the tires. In addition driving on rough roads may cause damage to the
tires themselves, as well as the vehicle’s wheels and body.
■If tire inflation pressures become low while driving
Do not continue driving, or your tires and/or wheels may be ruined.

639
4-3. Do-it-yourself maintenance
4
Maintenance and care
GX460_U.S.A. (OM60E69U)
■When replacing wheels
The wheels of your Lexus are equipped with tire pressure warning valves and trans-
mitters that allow the tire pressure warning system to provide advanced warning in
the event of a loss in tire inflation pressure. Whenever wheels are replaced, the tire
pressure warning valves and tran smitters must be installed. (P. 6 2 8 )
CAUTION
■When replacing wheels
●Do not use wheels that are a different size from those recommended in the
Owner’s Manual, as this may result in loss of handling control.
●Never use an inner tube in a leaking wheel which is designed for a tubeless tire.
Doing so may result in an accident, causing death or serious injury.
NOTICE
■Replacing tire pressure warning valves and transmitters
●Because tire repair or replacement may affect the tire pressure warning valves
and transmitters, make sure to have tires serviced by your Lexus dealer or other
qualified service shop. In addition, make sure to purchase your tire pressure
warning valves and transmitters at your Lexus dealer.
●Ensure that only genuine Lexus wh eels are used on your vehicle.
Tire pressure warning valves and transmitters may not work properly with non-
genuine wheels.

When trouble arises5
673
GX460_U.S.A. (OM60E69U)
5-1. Essential informationEmergency flashers ............... 674
If your vehicle needs 
to be towed ............................ 675
If you think something is 
wrong ....................................... 681
Fuel pump shut off  system..................................... 682
Event data recorder.............. 683
5-2. Steps to take in 
an emergency
If a warning light turns 
on or a warning buzzer 
sounds... ................................. 686
If a warning message is 
displayed................................ 698
If you have a flat tire............... 720
If the engine will not start .... 734
If the shift lever cannot be 
shifted from P ....................... 736
If you lose your keys ............... 737
If the electronic key does 
not operate properly.......... 738
If the vehicle battery is 
discharged .............................. 741
If your vehicle overheats ...... 744
If the vehicle becomes 
stuck......................................... 747

686
GX460_U.S.A. (OM60E69U)
5-2. Steps to take in an emergency
If a warning light turns on or a warning buzzer sounds...
Stop the vehicle immediately. Continuing to drive the vehicle may be
dangerous.
The following warning in dicates a possible problem in the brake system.
Immediately stop the vehicl e in a safe place and contact your Lexus
dealer.
*: Parking brake engaged warning buzzer: 
A buzzer will sound if the vehicle is driv en at a speed of approximately 3 mph (5
km/h) or more.
Warning lightWarning light/Details
(U.S.A.)

(Canada)
Brake system warning light (warning buzzer)*
•Low brake fluid
• Malfunction in the brake system
This light also comes on when the parking brake is not
released. If the light turns off after the parking brake is fully
released, the system is operating normally.
Calmly perform the following actions if any of the warning lights turn on or
flash. If a light turns on or flashes, bu t then turns off, this does not necessar-
ily indicate a malfunction in the system.

5
When trouble arises
687
5-2. Steps to take in an emergency
GX460_U.S.A. (OM60E69U)
Stop the vehicle immediately.The following warning indicates the po ssibility of damage to the vehicle
that may lead to an ac cident. Immediately stop the vehicle in a safe place
and contact your Lexus dealer.
Have the vehicle inspected by your Lexus dealer immediately.
Failing to investigate the cause of the following warnings may lead to the
system operating abnormally and possibly cause an accident. Have the
vehicle inspected by your Lexus dealer immediately.
Warning lightWarning light/Details
Charging system warning light
Indicates a malfunction in the vehicle’s charging system
while the engine is running.
Warning lightWarning light/Details
(U.S.A.)

(Canada)
Malfunction indicator lampMalfunction in:
• The emission control system;
• The electronic engine control system;
• The electronic throttle control system; or
• The electronic automatic transmission control system.

688
5-2. Steps to take in an emergency
GX460_U.S.A. (OM60E69U)
Warning lightWarning light/Details
SRS warning lightMalfunction in:
• The SRS airbag system;
• The front passenger occupant classification system; or
• The seat belt pretensioner system.
(U.S.A.)

(Canada)
ABS warning lightMalfunction in:
•The ABS; or
• The brake assist system.
Slip indicator light
Malfunction in:
• The VSC;
• The active traction control system;
• The downhill assist control system
*;
• The hill-start assist control system
*; or
• Crawl Control system*.
The indicator will blink when the system listed above is
operational. ( P. 3 3 2 )
(Flashing)
“PCS” warning light*
Indicates a malfunction in the pre-collision system. 
( P. 3 3 8 )
(Flashing)
“AFS OFF” indicator light*
Indicates a malfunction in the AFS (Adaptive Front-lighting
System). ( P. 223)

5
When trouble arises
689
5-2. Steps to take in an emergency
GX460_U.S.A. (OM60E69U)
*: If equipped
Warning lightWarning light/Details
(Flashing)
Automatic High Beam indicator light*
Indicates a malfunction in the automatic high beam system.
(P. 2 2 6 )
(Flashing)
“LDA” indicator light*
Indicates a malfunction in the lane departure alert. 
( P. 2 6 8 )
(Flashing)
Cruise control indicator light*
Indicates a malfunction in the cruise control system. 
( P. 242, 246)
(Flashing)
Radar cruise control indicator light*
Indicates a malfunction in the Dynamic radar cruise control
system. ( P. 2 4 6 )
Kinetic dynamic suspension system warning light
Malfunction in the kinetic dynamic suspension system.
(Flashing)
Multi-terrain Select indicator light*
Indicates a malfunction in the Multi-terrain Select system.
( P. 2 9 0 )
Low speed four-wheel drive indicator light
Indicates a malfunction in the four-wheel drive system if the
light continues flashing. ( P. 3 1 7 )
Center differential lock indicator light
Indicates a malfunction in the four-wheel drive system if the
light continues flashing. ( P. 3 1 7 )

690
5-2. Steps to take in an emergency
GX460_U.S.A. (OM60E69U)
Have the malfunction repaired immediately.After taking the specified steps to correct the suspected problem, check
that the warning light turns off.
Warning lightWarning light/DetailsCorrection procedure
Open door warning light
(warning buzzer)
*1
A door or a back door is not
fully closed.
Check that all doors and the
back door are closed.
Low fuel level warning light Remaining fuel 
(Approximately 3.4 gal. [13.0
L, 2.8 Imp.gal.] or less)
Refuel the vehicle.
(On the instru-
ment panel)
Driver’s seat belt reminder
light (warning buzzer)
*2
Warns the driver to fasten
his/her seat belt.Fasten the seat belt.
(On the center panel)
Front passenger’s seat belt
reminder light (warning
buzzer)
*2
Warns the front passenger to
fasten his/her seat belt.
Fasten the seat belt.