2014 Lexus GX460 check engine light

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GX460_OM_OM60K80U_(U)6-3. Do-it-yourself maintenance
Light bulbs
Check the wattage and color of the light bulb being replaced. (
P. 5 6 3 )
 P. 4 5 2
■Front
You may replace the following bulbs your self. The difficulty level of replace-
ment varies depending on the bulb. If necessary bulb replacement seems diffi-
cult to perform, contact your Lexus dealer.
For more information about replacing other light bulbs, contact your Lexus
dealer.
Preparing for light bulb replacement
Removing the engine compartment covers
Bulb locations
Front turn signal light
Headlight high beam1
2

5107-2. Steps to take in an emergency
GX460_OM_OM60K80U_(U)
*1: Open door warning buzzer:  P. 5 1 6
*2: Seat belt reminders:
The driver’s seat belt buzzer sounds to alert the driver that his or her seat belt is not
fastened. Once the engine switch is turned to IGNITION ON mode, the buzzer
sounds for 6 seconds. If the vehicle reaches a speed of 12 mph (20 km/h), the buzzer
sounds once. If the seat belt is still unfastened after 30 seconds, the buzzer will sound
intermittently for 10 seconds. Then, if the seat belt is still unfastened, the buzzer will
sound in a different tone for 20 more seconds.
The front passenger’s seat belt buzzer sounds to alert the front passenger that his or
her seat belt is not fastened. The buzzer sounds once if the vehicle reaches a speed of
12 mph (20 km/h). If the seat belt is still unfastened after 30 seconds, the buzzer will
sound intermittently for 10 seconds. Then, if the seat belt is still unfastened, the buzzer
will sound in a different tone for 20 more seconds.
■SRS warning light
This warning light system monitors the airbag sensor assembly, front airbag sensors, side
and curtain shield airbag sensor s, rear side and curtain shield airbag sensors, floor sen-
sor, driver’s seat belt buckle switch, front passenger occupant classification system (ECU
and sensors), “AIR BAG ON” indicator light, “AIR BAG OFF” indicator light, front pas-
senger’s seat belt buckle sw itch, seat belt pretensioner assemblies, airbags, intercon-
necting wiring and power sources. ( P. 3 4 )
■Front passenger detection sensor, seat belt reminder and warning buzzer
●If luggage is placed on the front passenger seat, the front passenger detection sensor
may cause the warning light to flash and the warning buzzer to sound even if a passen-
ger is not sittin g in the seat.
●If a cushion is placed on th e seat, the sensor may not detect a passenger, and the warn-
ing light may not operate properly.
■If the malfunction indicator lamp comes on while driving
First check the following:
●Is the fuel tank empty?
If it is, fill the fuel tank immediately.
●Is the fuel tank cap loose?
If it is, tighten it securely.
The light will go off after several driving trips.
If the light does not go off even after severa l trips, contact your Lexus dealer as soon as
possible.
■If the low speed four-wheel drive indicator light or the center differential lock indicator
light blinks
Take the specified steps. ( P. 3 3 2 )

5117-2. Steps to take in an emergency
GX460_OM_OM60K80U_(U)
7
When trouble arises
■When the tire pressure warning light comes on
Check the tire inflation pressure and adjust to the appropriate level.
■The tire pressure warning light may turn on due to natural causes
The tire pressure warning light may turn on du e to natural causes such as natural air leaks
or tire inflation pressure changes caused by temperature. In this case, adjusting the tire
inflation pressure will turn off the warning light (after a few minutes).
■When a tire is replaced with a spare tire
The tire pressure warning light will turn on if the tire inflation pressure of the spare tire is
low. If a tire goes flat, the tire pressure warning light will not turn off even though the flat
tire has been replaced with the spare tire.
■Conditions that the tire pressure warning system may not function properly
 P. 4 6 8
■If the tire pressure warning light frequently comes on after blinking for 1 minute
If the tire pressure warning light frequently comes on after blinking for 1 minute when the
engine switch is turned to IGNITION ON mo de, have it checked by your Lexus dealer.
■Warning buzzer
In some cases, the buzzer may not be heard due to being in a noisy location or audio
sound.
■Customization
The vehicle speed linked seat belt reminder buzzer can be disabled.
(Customizable features P. 5 7 8 )

5197-2. Steps to take in an emergency
GX460_OM_OM60K80U_(U)
7
When trouble arises
Indicates that the automatic transmission fluid tempera-
ture is too high A buzzer also sounds.
 Immediately stop the vehicle in a safe place, shift the
shift lever to P and wait until the warning message
and light go off. If the warning message and light go
off, you may start the vehicle again.
If the warning message and light do not go off, con-
tact your Lexus dealer.
Indicates a malfunction in the automatic transmission
system A buzzer also sounds.
 Have the vehicle inspected by your Lexus dealer.
Indicates that the moon roof is not fully closed (with the
engine switch off, and the driver’s door open)
A buzzer also sounds.
 Close the moon roof.
Indicates that engine oil level is low
A buzzer also sounds.
 Check the level of engine oil, and add if necessary.
Indicates a malfunction in:
• The LED headlight system;
• The automatic headlig ht leveling system; or
• The Automatic High Beam system (if equipped) A buzzer also sounds.
 Have the vehicle inspected by your Lexus dealer.
Indicates that the wash er fluid level is low
 Add washer fluid.
Wa r n i n g m e s s a g eDetails/Actions
(Flashes)

5467-2. Steps to take in an emergency
GX460_OM_OM60K80U_(U)
Start the engine of the second vehicle. Increase the engine speed slightly and
maintain at that level for approximately 5 minutes to recharge the battery of
your vehicle.
Open and close any of the doors of your vehicle with the engine switch off.
Maintain the engine speed of the second vehicle and start the engine of your
vehicle by turning the engine switch to IGNITION ON mode.
Once your vehicle’s engine has started, remove the jumper cables in the exact
reverse order in which they were connected.
Once the engine starts, have the vehicle checked at your Lexus dealer as soon
as possible.
■Starting the engine when the battery is discharged
The engine cannot be started by push-starting.
■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.
■Charging the battery
The electricity stored in the battery will discharge gradually even when the vehicle is not
in use, due to natural discharg e and the draining effects of certain electrical appliances. If
the vehicle is left for a long time, the battery may discharge, and the engine may be
unable to start. (The battery recharges automatically during driving.)
■When recharging or replacing the battery
●Make sure that the key is not inside the vehicle when recharging or replacing the bat-
tery. The key may be locked in the vehicle if the alarm is activated. ( P. 6 9 )
●In some cases, it may not be possible to unlock the doors using the smart access system
with push-button start when the battery is discharged. Use the wireless remote control
or the mechanical key to lock or unlock the doors.
●The engine may not start on the first attempt after the battery has recharged but will
start normally after the second attempt. This is not a malfunction.
●The engine switch mode is memorized by the vehicle. When the battery is recon-
nected, the system will return to the mode it was in before the battery was discharged.
Before disconnecting the battery, turn the engine switch off. If you are unsure what
mode the engine switch was in before the battery discharged, be especially careful
when reconnecting the battery.
3
4
5
6

GX460_OM_OM60K80U_(U)
5598-1. Specifications
8
Vehicle specifications
*: Your Lexus vehicle is filled with “Toyota Genuine Differential Gear Oil” at the factory.Use Lexus approved “Toyota Genuine Differential Gear Oil” or an equivalent of
matching quality to satisfy the above specif ication. Please contact your Lexus dealer
for further details.
*: Your Lexus vehicle is filled with “Toyota Genuine Differential Gear Oil” at the factory. Use Lexus approved “Toyota Genuine Differential Gear Oil” or an equivalent of
matching quality to satisfy the above specif ication. Please contact your Lexus dealer
for further details.
Electrical system (battery)
Specific gravity reading at
68 F (20 C):12.6  12.8 V Fully charged
12.2  12.4 V Half charged
11.8  12.0 V Discharged
(*: Voltage is checked 20 minutes after the engine
and all the lights are turned off.)
Charging rates5 A max.
Front differential
Oil capacity1.48 qt. (1.40 L, 1.23 Imp.qt.)
Oil type and viscosity*Toyota Genuine Differential Gear Oil LT 75W-85
GL-5 or equivalent
Rear differential
Oil capacity2.85 qt. (2.70 L, 2.38 Imp.qt.)
Oil type and viscosity*Toyota Genuine Differential Gear Oil LT 75W-85
GL-5 or equivalent

611Alphabetical index
GX460_OM_OM60K80U_(U)
Emergency flashers ............................. 498
EngineAccessory mode................................. 182
Compartment....................................... 451
Hood ....................................................... 450
How to start the engine ..................... 181
Identification number ...................... 556
If the engine will not start............... 540
Ignition switch (engine switch)....... 181
Overheating ........................................ 548
Engine compartment cover ...............451
Engine coolant....................................... 455 Capacity ................................................ 558
Checking............................................... 455
Preparing and checking before winter ................................... 366
Engine immobilizer system ................. 66
Engine oil ................................................. 453 Capacity ................................................ 556
Checking................................................453
Preparing and checking before winter ................................... 366
Engine switch ............................................ 181
Engine switch light ............................... 392
EDR .................................................................10 Flat tire .......................................................527
Floor mats.................................................... 24
Fluid
Automatic transmission ................. 560
Brake..........................................................561
Steering .................................................. 562
Washer ................................................... 463
Fog lights.................................................. 200 Switch ................................................. 200
Wattage .................................................563
Four-wheel drive system................... 332
Front passenger occupant classification system ............................45
Front passenger’s seat belt reminder light ..................................... 509
Front position lights ............................... 192 Light switch............................................. 192
Wattage .................................................563
Front seats .................................................. 115 Adjustment............................................... 115
Cleaning................................................. 437
Correct driving posture .................... 26
Driving position memory.................128
Head restraints ..................................... 132
Seat heaters ..........................................390
Seat position memory .......................128
Front turn signal lights ..........................190 Replacing light bulbs .......................490
Turn signal lever .................................. 190
Wattage .................................................563F
*:For vehicles with a navigation system or a multimedia system, refer to the
“NAVIGATION SYSTEM OWNER’S MANUAL” or “MULTIMEDIA OWNER’S MANUAL”.

617Alphabetical index
GX460_OM_OM60K80U_(U)
Door lock switches ..............................99
Driving position memory switches ................................................ 128
Emergency flashers switch .......... 498
Engine switch .......................................... 181
Fog light switch .................................. 200
Four-wheel drive control switch.................................................... 332
Headlight cleaner switch .............. 209
Height control button ...................... 327
LDA switch ...........................................228
Light switches ....................................... 192
Moon roof switches........................... 145
Multi-terrain Monitor switch ....... 303
Multi-terrain Select switch............ 298
“ODO TRIP” button .................... 78, 81
Outside rear view mirror switches ................................................ 139
Parking assist........................................ 234
PCS off switch .................................... 358
Power door lock switch ....................99
Power window switch .......................142
Rear window wiper and washer switch...................................207
Rear window and outside rear view mirror
defoggers switch ............................. 381
Seat heater switches........................ 390
Talk switch Tilt and telescopic steering
control switch.....................................135
Vehicle-to-vehicle distance button ..................................................... 219
VSC OFF switch ............................... 343
Window lock switch .......................... 142
Windshield wipers and washer switch .................................. 202
Tachometer ................................................ 77
Tail lights .................................................... 192 Light switch............................................. 192
Talk switch
*
Telephone switch
*
Theft deterrent system Alarm .......................................................... 68
Engine immobilizer system ............. 66
Tire inflation pressure........................... 471 Maintenance data................................ 471
Tires ............................................................464 Chains ..................................................... 366
Checking ............................................... 464
If you have a flat tire .......................... 527
Inflation pressure.................................. 471
Information............................................ 567
Replacing ............................................... 527
Rotating tires ........................................ 464
Size ........................................................... 562
Snow tires ..............................................368
Spare tire................................................ 527
Tire pressure warning system .................................................. 465
T
*:For vehicles with a navigation system or a multimedia system, refer to the
“NAVIGATION SYSTEM OWNER’S MANUAL” or “MULTIMEDIA OWNER’S MANUAL”.