engine Lexus GX460 2021 Owner's Manual /

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GX460_OM_OM60T19U_(U)6-3. Do-it-yourself maintenance
■How to initialize the tire pressure warning system
Park the vehicle in a safe place and st op the engine for 20 minutes or more.
Initialization cannot be performed while the vehicle is moving.
Adjust the tire inflation pressure to th e specified cold tire inflation pressure
level. ( P. 568)
Make sure to adjust the tire pressure to the specified cold tire inflation pressure
level. The tire pressure warning system will operate based on this pressure level.
Start the engine. (P. 200)
Press or of the meter control switches and select .
Press or of the meter control switches and select “Vehicle
Settings”, and then press .
Press or of the meter control switches and select “TPWS”, and
then press .
Press or of the meter
control switches and select “Set
Pressure”, and then press and
hold until the tire pressure
warning light starts blinking.
A message is displayed on the multi-
information display. Also, “--” is dis-
played for inflation pressure of each
tire on the multi-information display
while the tire pressure warning sys-
tem determines the position.
Drive at approximately 25 mph (40 km /h) or more for approximately 10 to
30 minutes.
When initialization is comple te, the inflation pressure of each tire will be displayed
on the multi-information display.
Even if the vehicle is not driven at ap proximately 25 mph (40 km/h) or more, ini-
tialization can be co mpleted by driving for a long ti me. However, if initialization
does not complete after driving for 1 hour or more, park the vehicle in a safe place
for approximately 20 minutes and then drive the vehicle again.
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GX460_OM_OM60T19U_(U)
4756-3. Do-it-yourself maintenance
6
Maintenance and care
◆Registering ID codes
Every tire pressure warning valve and transmitter has a unique ID code.
When replacing a tire pressure warning valve and transmitter, it is necessary
to register the ID code.
When registering the ID codes, perform the following procedure.
Park the vehicle in a safe place, wait for approximately 20 minutes, and
then start the engine. ( P. 200)
Press or of the meter control switches and select .
Press or of the meter control switches and select “Vehicle
Settings”, and then press .
Press or of the meter control switches and select “TPWS”, and
then press .
Press or of the meter
control switches and select
“Change Wheel Set”, and then
press and hold until the tire
pressure warning light starts
slowly blinking 3 times.
Then a message will be displayed on
the multi-information display.
When registration is being performed, the tire pressure warning light will blink for
approximately 1 minute then illuminate and “--” will be displayed for the inflation
pressure of each tire on the multi-information display.
Drive at approximately 25 mph (40 km /h) or more for approximately 10 to
30 minutes.
Registration is complete when the tire pressure warning light turns off and the
inflation pressure of each tire is displayed on the multi-information display.
Even if the vehicle is not driven at approxim ately 25 mph (40 km/h) or more, reg-
istration can be completed by driving for a long time. However, if registration does
not complete after driving for 1 hour or more, perform the procedure again from
the beginning.
Initialize the tire pressure warning system. ( P. 474)
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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.

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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.

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GX460_OM_OM60T19U_(U)6-3. Do-it-yourself maintenance
Air conditioning filter
Turn the engine switch off.
Open the glove box and remove the
glove box cover.
Remove the filter cover.
The air conditioning filter must be ch
anged regularly to maintain air condi-
tioning efficiency.
Removal method
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GX460_OM_OM60T19U_(U)6-3. Do-it-yourself maintenance
Checking and replacing fuses
Turn the engine switch off.
Open the fuse box cover.
Remove the fuse with the pull-out tool.
Only type A fuse can be removed using
the pull-out tool.
If any of the electrical components do not operate, a fuse may have blown. If
this happens, check and repl ace the fuses as necessary.
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Engine compartmentDriver’s side instrument panel
Push the tab in and lift the lid off. Remove the lid.
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GX460_OM_OM60T19U_(U)
7When trouble arises
7-1. Essential informationEmergency flashers ................. 508
If your vehicle has to be stopped in
an emergency ..........................509
If the vehicle is trapped in rising water ................................. 510
7-2. Steps to take in an emergency If your vehicle needs to be towed................................... 511
If you think something is wrong ............................................ 516
Fuel pump shut off system ........517
If a warning light turns on or a warning buzzer
sounds........................................... 518
If a warning message is displayed..................................... 527
If you have a flat tire ................... 531
If the engine will not start ........545
If the electronic key does not operate properly ............. 547
If the vehicle battery is discharged ................................ 550
If your vehicle overheats .........553
If the vehicle becomes stuck .............................................556

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GX460_OM_OM60T19U_(U)7-1. Essential information
Emergency flashers
Press the switch.
All the turn signals will flash.
To turn them off, press the switch once
again.
■Emergency flashers
If the emergency flashers are used for a long time while the engine is not operating, the
battery may discharge.
The emergency flashers are used to warn other drivers when the vehicle has
to be stopped in the road due to a breakdown, etc.

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GX460_OM_OM60T19U_(U)
7
When trouble arises
7-1. Essential information
If your vehicle has to be stopped in an emergency
Steadily step on the brake pedal with both feet and firmly depress it.
Do not pump the brake pedal repeatedly as this will increase the effort required to
slow the vehicle.
Shift the shift lever to N.
If the shift lever is shifted to N
After slowing down, stop the vehicle in a safe place by the road.
Stop the engine.
If the shift lever cannot be shifted to N
Keep depressing the brake pedal with both feet to reduce vehicle speed as
much as possible.
To stop the engine, press and hold
the engine switch for 2 consecutive
seconds or more, or press it briefly 3
times or more in succession.
Stop the vehicle in a safe place by the road.
Only in an emergency, such as if it becomes impossible to stop the vehicle in
the normal way, stop the vehicl e using the following procedure:
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Press and hold for 2 seconds or more,
or press briefly 3 times or more
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WARNING
■If the engine has to be turned off while driving
Power assist for the brakes and steering wheel will be lost, making the brake pedal
harder to depress and the steering wheel heav ier to turn. Decelerate as much as possi-
ble before turning off the engine.
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GX460_OM_OM60T19U_(U)
7
When trouble arises
7-2. Steps to take in an emergency
If your vehicle needs to be towed
The following may indicate a problem with your transmission. Contact your
Lexus dealer or commercial to wing service before towing.
●The engine is running but the vehicle does not move.
●The vehicle makes an abnormal sound.
If towing is necessary, we recommend having your vehicle towed by your
Lexus dealer or commercial towing se rvice, using a wheel-lift type truck or
flatbed truck.
Use a safety chain system for all towing, and abide by all state/provincial and
local laws.
If towing your vehicle with a wheel-lift type truck, use a towing dolly.
(  P. 512, 514)
Situations when it is necessary to contact dealers before towing