Drive mode Lexus GX460 2021 / Workshop Manual

GX460_OM_OM60T19U_(U)
4796-3. Do-it-yourself maintenance
6
Maintenance and care
■The initialization operation
●Make sure to carry out initialization after adjusting the tire inflation pressure.
Also, make sure the tires are cold before carryi ng out initialization or tire inflation pres-
sure adjustment.
●If you have accidentally turned the engine swit ch off during initialization, it is not neces-
sary to manually restart the in itialization again, as initialization will restart automatically
the next time the engine switch is turned to IGNITION ON mode.
●If you accidentally perform initialization when initialization is not necessary, adjust the
tire inflation pressure to the specified leve l when the tires are cold, and conduct initial-
ization again.
●While the position of each tire is being de termined and the inflation pressures are not
being displayed on the multi-info rmation display, if the inflation pressure of a tire drops,
the tire pressure warning light will come on.
■Warning performance of the tire pressure warning system
The warning of the tire pressu re warning system will change in accordance with the con-
ditions under which it was init ialized. For this reason, the system may give a warning even
if the tire pressure does not reach a low enough level, or if the pressure is higher than the
pressure that was adjusted to when the system was initialized.
■When initialization of the tire pressure warning system has failed
●Do not move the vehicle backward during in itialization. Initialization is started again
from the beginning and it ma y take longer than usual.
●Initialization may take longer to complete if the vehicle is driven on an unpaved road.
When performing initialization, drive on a paved road if possible. Depending on the
driving environment and cond ition of the tires, initialization will be completed in
approximately 10 to 30 minutes.
• If initialization is not comp lete after driving approximately 30 minutes, continue
driving for a while.
• If initialization is not complete after driv ing approximately 1 hour, park the vehicle in
a safe place for approximately 20 minutes. Then drive straight (with occasional left
and right turns) at approximat ely 25 mph (40 km/h) or more
* for approximately 10
to 30 minutes.
If initialization is still not complete, have the vehicle inspected by your Lexus dealer.
*: Except when making a left/right turn
●In the following situations, th e tire inflation pressure will not be recorded and the system
will not operate properly. Perform initialization again.
• If, when attempting to start initialization , the tire pressure warning light does not
blink 3 times.
• If, when the vehicle has been driven for ab out 20 minutes after performing initializa-
tion, the tire pressure warning light blinks for approximately 1 minute and then illumi-
nates.

480
GX460_OM_OM60T19U_(U)6-3. Do-it-yourself maintenance
■When registering ID codes
●ID code registration is performed while driving at a vehicle speed of approximately 25
mph (40 km/h) or more.
●Before performing ID code registration, make
sure that no wheels with tire pressure
warning valve and transmitters installed are near the vehicle.
●Initialize the tire pressure warning system after ID code registration. Initialization is dis-
abled if the system was init ialized before registration.
●After ID code registration, the tires are hot by driving. Initialize the tire pressure warn-
ing system after the tires become cold.
●ID codes can be registered by yourself, bu t depending on the driving conditions and
driving environment, registration may take some time to complete.
■Canceling the change wheel set mode
●If turning the engine switch off when in th e change wheel set mode before driving, the
change wheel set mode is canceled.
●After driving when in the ch ange wheel set mode, the change wheel set mode cannot
be canceled. To cancel the mode, perform th e procedure for ID code registration again
and turn the engine switch off before driving.
●If the change wheel set mode is canceled, the ID codes that have already been regis-
tered are communicated. When communication is finished, the tire pressure warning
light will turn off.
■When ID code registration has failed
●Registration may take long time or the ID codes may not be registered in the following
situations.
• When the vehicle is moved ba ckward during registration.
Registration is started again from the beginning and it may take longer than usual.
• When another vehicle is running the side of the vehicle such as in heavy traffic. It may take longer to detect the vehicle’s tire pressure warning valves and transmit-
ters.
• If tire pressure warning valves an d transmitters are in the vehicle.
The ID codes may not be registered.
●When performing registration , drive on a paved road if possible. Depending on the
driving environment and conditio n of the tires, registration will be completed in approx-
imately 10 to 30 minutes.
• If registration is not comple te after driving approximately 30 minutes, continue driv-
ing for a while.
• If registration is not complete after driving approximately 1 hour, park the vehicle in a safe place for approximately 20 minutes. Then drive straight (with occasional left
and right turns) at approximat ely 25 mph (40 km/h) or more
* for approximately 10
to 30 minutes.
If registration is still not complete, have the vehicle inspected by your Lexus dealer.
*: Except when making a left/right turn
●When the tire pressure warning light does not blink slowly 3 times, the ID code will not
be registered and the system will not operate properly. Perform registration again.

482
GX460_OM_OM60T19U_(U)6-3. Do-it-yourself maintenance
WARNING
■Tire pressure warning system operation
The tire pressure warning system may not provide warning immediat
ely if a tire bursts
or if sudden air leakage occurs.
■When inspecting or replacing tires
Observe the following precautions to preven t accidents. Failure to do so may cause
damage to parts of the drive train as well as dangerous handling characteristics, which
may lead to an accident result ing in death or serious injury.
●Do not mix tires of different makes, models or tread patterns.
Also, do not mix tires of remarkably different treadwear.
●Do not use tire sizes other than those recommended by Lexus.
●Do not mix differently constructed tires (radial, bias-belted or bias-ply tires).
●Do not mix summer, all season and snow tires.
●Do not use tires that have been used on another vehicle.
Do not use tires if you do not know how they were used previously.
■When initializing the tire pressure warning system
Do not initialize tire inflatio n pressure without first adjustin g the tire inflation pressure to
the specified level. Otherwise, the tire pre ssure warning light may not come on even if
the tire inflation pressure is low, or it ma y come on when the tire inflation pressure is
actually normal.

5137-2. Steps to take in an emergency
GX460_OM_OM60T19U_(U)
7
When trouble arises
Securely attach cables or chains to
the towing hooks.
Take care not to damage the vehicle
body.
Enter the vehicle being towed and start the engine.
If the engine does not start, turn th e engine switch to IGNITION ON mode.
Set the four-wheel drive control switch in H4 and push the center differential
lock/unlock switch to unlock the center differential. (P. 344)
For models with the rear height cont rol air suspension: Change the vehicle
height to N (normal) mode and end th e vehicle height control operation.
( P. 339)
Shift the shift lever to N and release the parking brake.
When the shift lever cannot be shifted: P. 209
■While towing
If the engine is not running, the power assist for the brakes and steering will not function,
making steering and br aking more difficult.
Emergency towing procedure
1
2
3
4
5

5147-2. Steps to take in an emergency
GX460_OM_OM60T19U_(U)
WARNING
Observe the following precautions.
Failure to do so may result in death or serious injury.
■When towing the vehicle
■While towing
●When towing using cables or chains, avoid sudden starts, etc. which place excessive
stress on the towing eyelets, cables or chains. The towing eyelets, cables or chains
may become damaged, broken debris ma y hit people, and cause serious damage.
●For models with the rear height control air suspension: Make sure to disable all func-
tions of the vehicle height control of the rear height control air suspension. Other-
wise, the vehicle height may change and part of your body may be caught under the
vehicle, possibly causing injury. ( P. 339)
●Do not turn the engine switch off.
There is a possibility that the steering wheel is locked and cannot be operated.
Be sure to transport the vehicle with all four
wheels raised off the ground. If the vehicle is
towed with the tires contacting the ground, the
drivetrain or related parts may be damaged,
the vehicle may fly off the truck.

562
GX460_OM_OM60T19U_(U)8-1. Specifications
■Engine number
The engine number is stamped on
the engine block as shown.
*: The engine oil capacity is a reference quantity to be used when changing the engine
oil. Warm up and turn off the engine, wait more than 5 minutes, and check the oil level
on the dipstick.
Engine
Model4.6 L 8-cylinder (1UR-FE)
Type8-cylinder V type, 4-cycle, gasoline
Bore and stroke3.70  3.27 in. (94.0  83.0 mm)
Displacement281.2 cu.in. (4608 cm3)
Valve clearanceAutomatic adjustment
Drive belt tensionAutomatic adjustment
Fuel
Fuel typeUnleaded gasoline only
Octane rating91 (Research Octane Number 96) or higher
Fuel tank capacity (Reference)23.0 gal. (87 L, 19.1 Imp.gal.)
Lubrication system
Oil capacity
(Drain and refill — reference*)
With filter
Without filter8.2 qt. (7.8 L, 6.9 Imp.qt.)
7.8 qt. (7.4 L, 6.5 Imp.qt.)

612What to do if... (Troubleshooting)
GX460_OM_OM60T19U_(U)
●It is locked automatically to prevent theft of the vehicle. ( P. 202)
●Is the window lock switch pressed?
The power window except for the one at the driver’s seat cannot be operated
if the window lock switch is pressed. ( P. 160)
●The auto power off function will be operated if the vehicle is left in ACCES-
SORY or IGNITION ON mode (the engine is not running) for a period of
time. ( P. 202)
●The seat belt reminder light is flashing
Are the driver and the front passe nger wearing the seat belts?
( P. 520)
●The parking brake indicator is on
Is the parking brake released? ( P. 212)
Depending on the situation, other types of warning buzzer may also sound.
( P. 518, 527)
●Did anyone inside the vehicle open a door during setting the alarm?
The sensor detects it and the alarm sounds. ( P. 79)
To stop the alarm, turn the engine switch to IGNITION ON mode or start the
engine. The steering wheel cannot be turned after the engine is stopped
The windows do not open or close by operating the power window
switches
The engine switch is turned off automatically
A warning buzzer sounds during driving
An alarm is activated and the horn sounds

617Alphabetical index
GX460_OM_OM60T19U_(U)
Emergency flashers .............................508
EngineAccessory mode................................. 201
Brake Override System .................. 169
Compartment..................................... 459
Drive-Start Control............................ 170
Hood ....................................................... 458
How to start the engine ................. 200
Identification number .......................562
If the engine will not start............... 545
Ignition switch (engine switch)... 200
Overheating ........................................ 553
Engine compartment cover ............. 460
Engine coolant....................................... 463 Capacity ................................................ 564
Checking................................................463
Preparing and checking before winter .................................... 374
Engine immobilizer system .................. 77
Engine oil ...................................................461 Capacity .................................................562
Checking................................................. 461
Preparing and checking before winter .................................... 374
Warning message .............................529
Engine oil maintenance data ........... 462
Engine switch .........................................200
Engine switch light ...............................400
Event data recorder (EDR) ...................10 Flat tire ........................................................ 531
Floor mats....................................................26
Fluid
Automatic transmission ..................566
Brake........................................................ 567
Steering ................................................. 568
Washer ..................................................... 471
Fog lights.................................................... 221 Replacing light bulbs ...................... 505
Switch ........................................................ 221
Four-wheel drive system....................344
Front passenger occupant classification system ............................ 47
Front passenger’s seat belt reminder light ..................................... 520
Front seats ................................................. 132 Adjustment.............................................. 132
Cleaning................................................. 445
Correct driving posture .................... 28
Driving position memory.................145
Head restraints .................................... 150
Seat heaters ..........................................398
Seat position memory .......................145
Front turn signal lights ............................211 Replacing light bulbs ........................ 501
Turn signal lever .....................................211
Wattage .................................................569F

623Alphabetical index
GX460_OM_OM60T19U_(U)
Crawl Control switch ..................... 348
Cruise control switch...................... 258
“DAC” switch.......................................352
Door lock switches .............................. 110
Driving position memory switches ................................................ 145
Emergency flashers switch .......... 508
Engine switch ...................................... 200
Fog light switch ..................................... 221
Four-wheel drive control switch....................................................344
Headlight cleaner switch ...............228
Height control switch.......................339
LDA (Lane Departure Alert) .......252
Light switches ........................................213
Moon roof switches........................... 163
Multi-terrain Monitor switch ........ 292
Multi-terrain Select switch............ 288
“ODO TRIP” button ..............................91
Outside rear view mirror switches ................................................ 157
Parking assist........................................270
Power door lock switch .................... 115
Power window switch ...................... 160
Rear window wiper and washer switch................................... 226
Rear window and outside rear view mirror
defoggers switch ........................... 389
Second start mode switch.............207
Seat heater switches........................ 398
Talk switch
*
Tilt and telescopic steering control switch .................................... 153 Vehicle-to-vehicle distance
switch ................................................... 264
VSC OFF switch ............................... 357
Window lock switch ......................... 160
Windshield wipers and washer switch ...................................222
Tachometer ............................................... 90
Tail lights .................................................... 213 Light switch............................................. 213
Replacing light bulbs ...................... 505
Talk switch
*
Telephone switch
*
Theft deterrent system Alarm ...........................................................79
Engine immobilizer system .............. 77
Tire inflation pressure......................... 484 Maintenance data............................. 568
Tire pressure warning system ..........473 Function .................................................. 473
Initializing ............................................... 473
Initializing procedures..................... 474
Installing tire pressure warning valves and transmitters................ 473
Registering ID codes ....................... 475
Warning light .......................................520
Tires ............................................................ 472 Chains ..................................................... 374
Checking ................................................472
If you have a flat tire ............................531
Inflation pressure................................ 484
Information............................................ 573
Replacing .................................................531
Rotating tires .........................................472
T
*: Refer to the “NAVIGATION SYSTEM OWNER’S MANUAL” or “MULTIMEDIA OWNER’S MANUAL”.