2010 Lexus GX460 check engine light

202
2-2. Instrument cluster
GX460_U.S.A. (OM60E69U)
■Warning lights
Warning lights inform the driver of malfunctions in the indicated
vehicle’s systems. ( P. 6 8 6 , 6 9 8 )
*1: These lights turn on when the “ENGINE START STOP” switch is turned
to IGNITION ON mode to indicate that a system check is being per-
formed. They will turn off after the en gine is on, or after a few seconds.
There may be a malfunction in a system if a light does not come on, or if
the lights do not turn off. Have the vehicle inspected by your Lexus
dealer.
*2: The indicator flashes to indicate a malfunction.
(U.S.A.)(Canada)(U.S.A.)(Canada)
(U.S.A.)(Canada)(for driver)(for front
passenger)(if equipped)
(if equipped)(if equipped)(if equipped)(if equipped)
(if equipped)
*1*1*1*1*1*1
*1*1*1*1*1, 2*1
*1*2*2*2*1, 2*2*2*2
*2

237
2-3. Operating the lights and windshield wipers
2
When driving
GX460_U.S.A. (OM60E69U)
■The windshield wipers and wa sher can be operated when
The “ENGINE START STOP” switch is in IGNITION ON mode.
■Rain drop sensor
●If the wiper switch is turned to the “AUTO” position while the “ENGINE START
STOP” switch is in IGNITION ON mode, the wipers will operate once to show
that “AUTO” mode is activated.
●If the temperature of the rain drop sensor is 194 F (90  C) or higher, or 5 F
(-15 C) or lower, the automatic operation may not occur. In this case, operate
the wipers in any mode other than “AUTO”.
■Effects of vehicle speed on wiper operation
With the settings other than “AUTO” also, the time until drip prevention wiper
sweep occurs is changed depending on vehicle speed. 
With selected, wiper operation will be switched from low speed to intermit-
tent wiper operation only when the vehicle is stationary. (However, when the sensor
sensitivity is adjusted to the highest level, the mode cannot be switched.)
■If no windshield washer fluid sprays
Check that the washer nozzles are not blocked if there is washer fluid in the wind-
shield washer fluid reservoir.
●The raindrop sensor judges the amount of
raindrops.
An optical sensor is adopted. It may not
operate properly when sunlight from the
rising or setting of the sun intermittently
strikes the windshield, or if bugs etc. are
present on the windshield.

240
2-3. Operating the lights and windshield wipers
GX460_U.S.A. (OM60E69U)
■The rear window wiper and washer can be operated when
●The “ENGINE START STOP” switch is in IGNITION ON mode.
●The glass hatch is closed.
■If no windshield washer fluid sprays
Check that the washer nozzles are not blocked if there is washer fluid in the wind-
shield washer fluid reservoir.
NOTICE
■When the rear window is dry
Do not use the wiper, as it may damage the rear window.
■When the washer fluid tank is empty
Do not operate the switch continually as the washer fluid pump may overheat.

284
2-4. Using other driving systems
GX460_U.S.A. (OM60E69U)
■The wide view front & side monitor can be operated when
●The “ENGINE START STOP” switch is in IGNITION ON mode.
●The vehicle speed is less than approximately 6 mph (10km/h).
■Automatic system cancelation
In the following situations, the system is canceled automatically.
●When the vehicle speed exceeds approximately 7 mph (12 km/h).
●When the shift lever is in P or R.
■When the outside rear view mirrors have been folded
The side monitor screen can be displayed even if the outside rear view mirrors have
been folded. In this case, there will be a slight difference between the image dis-
played when the outside rear view mirrors are extended and when the outside rear
view mirrors have been folded.
If the side monitor is displayed while the outside rear view mirrors are folded, you
cannot check the area near the front edge of the vehicle as the base of the outside
rear view mirrors will be in the way.

Maintenance and care4
587
GX460_U.S.A. (OM60E69U)
4-1. Maintenance and careCleaning and protecting 
the vehicle exterior............ 588
Cleaning and protecting 
the vehicle interior .............. 592 4-2. Maintenance
Maintenance 
requirements........................ 595
General maintenance ........... 597
Emission inspection and 
maintenance (I/M) 
programs ................................ 601
4-3. Do-it-yourself maintenance Do-it-yourself service 
precautions ........................... 602
Hood .......................................... 607
Engine compartment ........... 608
Tires............................................. 627
Tire inflation pressure........... 634
Wheels ...................................... 638
Air conditioning filter ........... 640
Electronic key battery.......... 642
Checking and replacing 
fuses ........................................ 645
Headlight aim (vehicles with low 
beam halogen bulbs) ......... 658
Light bulbs ................................ 660

660
4-3. Do-it-yourself maintenance
GX460_U.S.A. (OM60E69U)
Light bulbs
You may replace the following bulbs by yourself. The difficulty level of
replacement varies depending on the bulb. If necessary bulb replacement
seems difficult to perform, contact your Lexus dealer. 
For more information about replacing other light bulbs, contact your Lexus
dealer.
■ Prepare a replacement light bulb
Check the wattage and color of the light bulb being replaced. 
( P. 76 1 )
■ Remove the engine compartment cover
 P. 6 0 9
■ Front bulb locations
Headlight low beam 
(halogen bulb)
Headlight high beam Parking/front side marker light
Front turn signal light
Fog light

5
When trouble arises
691
5-2. Steps to take in an emergency
GX460_U.S.A. (OM60E69U)
*1: Open door warning buzzer:
The open door warning buzzer sounds to alert one or more of the doors is not
fully closed (with the vehicle having reached a speed of 3 mph [5 km/h]). 
( P. 7 0 3 )
*2: Driver’s and front passenger’s seat belt reminder buzzer:
The driver’s and front passenger’s seat belts reminder buzzer sounds to alert
the driver and front passenger that his/he r seat belt is not fastened. Once the
“ENGINE START STOP” switch is turned to IGNITION ON mode, the buzzer
sounds for 4 to 8 seconds. If the vehicl e reaches a speed of 12 mph (20 km/h),
the buzzer sounds intermittently for 10 se conds. Then, if the seat belt is still
unfastened, the buzzer w ill sound in a different tone for 20 more seconds.
Warning lightWarning light/DetailsCorrection procedure
Master warning light
A buzzer sounds and the
warning light comes on and
flashes to indicate that the
master warning system has
detected a malfunction.
 P. 6 9 8
Tire pressure warning light
When the light comes on:
Low tire inflation pressure.Adjust the tire inflation pres-
sure.
When the light comes on after
blinking for 1 minute:
Malfunction in the tire pres-
sure warning system.
Have the system checked by
your Lexus dealer.

694
5-2. Steps to take in an emergency
GX460_U.S.A. (OM60E69U)
The tire pressure warning system may become inoperative in the following condi-
tions: 
(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 genuine Lexus wheels,
the tire pressure warning system may no t work properly with some types of
tires.)
●If tire chains are used.
●If the spare tire is in a location subj ect to poor radio wave signal reception.
● If a large metallic object which can interfere with signal reception is put in the
luggage compartment.
■If the tire pressure warning light comes on after blinking for 1 minute frequently
If the tire pressure warning light comes on after blinking for 1 minute frequently
when the engine switch is turned to the “ON” position, have it checked by your
Lexus dealer.
■After changing the engine oil (U.S.A. only)
Make sure to reset the oil maintenance data. ( P. 6 1 3 )