Toyota Highlander (2018 year). Manual - part 131

536

7-3. Do-it-yourself maintenance

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Routine tire inflation pressure checks
The tire pressure warning system does not replace routine tire inflation
pressure checks. Make sure to check tire inflation pressure as part of
your routine of daily vehicle checks.

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Maximum load of tire
Check that the number given by dividing the maximum load by 1.10 of the
replacement tire is greater than 1/2 of the Gross Axle Weight Ratings
(GAWR) of either the front axle or the rear axle, whichever is greater.

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Tire types

●

Summer tires

Summer tires are high-speed performance tires best suited to highway
driving under dry conditions. Since summer tires do not have the same
traction performance as snow tires, summer tires are inadequate for
driving on snow-covered or icy roads. For driving on snow-covered
roads or icy roads, the use of snow tires is recommended. When install-
ing snow tires, be sure to replace all four tires.

●

All season tires

All season tires are designed to provide better traction in snow and to
be adequate for driving in most winter conditions as well as for use
year-round. All season tires, however, do not have adequate traction
performance compared with snow tires in heavy or loose snow. Also, all
season tires fall short in acceleration and handling performance com-
pared with summer tires in highway driving.

●

Snow tires

For driving on snow-covered roads or icy roads, we recommend using
snow tires. If you need snow tires, select tires of the same size, con-
struction and load capacity as the originally installed tires. Since your
vehicle has radial tires as original equipment, make sure your snow
tires also have radial construction. Do not install studded tires without
first checking local regulations for possible restrictions. Snow tires
should be installed on all wheels. (

→P. 339)

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If the tread on snow tires wears down below 0.16 in. (4 mm)
The effectiveness of the tires as snow tires is lost.

For the GAWR, see the Certification
Label. For the maximum load of the tire,
see the load limit at maximum cold tire
inflation pressure mentioned on the
sidewall of the tire. (

→P. 667)

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Situations in which the tire pressure warning system may not oper-
ate properly

●

In the following cases, the tire pressure warning system may not operate
properly.

• If non-genuine Toyota wheels are used. 
• A tire has been replaced with a tire that is not an OE (Original Equip-

ment) tire.

• A tire has been replaced with a tire that is not of the specified size.
• Tire chains, etc. are equipped.
• An auxiliary-supported run-flat tire is equipped.
• If a window tint that affects the radio wave signals is installed.
• If there is a lot of snow or ice on the vehicle, particularly around the

wheels or wheel housings.

• If the tire inflation pressure is extremely higher than the specified

level.

• If the spare tire is in a location subject to poor radio wave signal

reception.

*

• If a large metallic object which can interfere with signal reception is

put in the luggage compartment.

*

*

: Vehicles with a full-size spare tire only

●

Performance may be affected in the following situations.

• Near a TV tower, electric power plant, gas station, radio station, large

display, airport or other facility that generates strong radio waves or
electrical noise

• When carrying a portable radio, cellular phone, cordless phone or

other wireless communication device

●

When the vehicle is parked, the time taken for the warning to start or go
off could be extended.

●

When tire inflation pressure declines rapidly for example when a tire has
burst, the warning may not function.

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7-3. Do-it-yourself maintenance

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The initialization operation

●

Make sure to carry out initialization after adjusting the tire inflation pres-
sure.
Also, make sure the tires are cold before carrying out initialization or tire
inflation pressure adjustment.

●

If you have accidentally turned the engine switch to the “LOCK” position
(vehicles without a smart key system) or off (vehicles with a smart key
system) during initialization, it is not necessary to press the reset switch
again as initialization will restart automatically when the engine switch
has been turned to the “ON” position (vehicles without a smart key sys-
tem) or IGNITION ON mode (vehicles with a smart key system) for the
next time.

●

If you accidentally press the reset switch when initialization is not neces-
sary, adjust the tire inflation pressure to the specified level when the
tires are cold, and conduct initialization again.

■

When initialization of the tire pressure warning system has failed
Initialization can be completed in a few minutes. However, in the following
cases, the settings have not been recorded and the system will not oper-
ate properly. If repeated attempts to record tire inflation pressure settings
are unsuccessful, have the vehicle inspected by your Toyota dealer.

●

When operating the tire pressure warning reset switch, the tire pressure
warning light does not blink 3 times.

●

After carrying out the initialization procedure, the tire pressure warning
light blinks for 1 minute then stays on after driving for 20 minutes.

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Tire pressure warning system certification
<Sensor, Receiver>
TRW Automotive
Tire Pressure Monitoring Sensor
FCC ID: GQ4-51T

This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:

(1) This device may not cause harmful interference, and

(2) This device must accept any interference received, including interfer-

ence that may cause undesired operation of this device.

WARNING: Changes or modifications not expressly approved by TRW
Automotive U.S. LLC could void the user’s authority to operate the
equipment.

<Sensor, Receiver>
TRW Automotive
Tire Pressure Monitoring Sensor
Model: 228408
IC: 1470A-32T
MADE IN U.S.A

This device complies with Industry Canada license-exempt RSS
standard(s). Operation is subject to the following two conditions:

(1) This device may not cause harmful interference, and

(2) This device must accept any interference received, including interfer-

ence that may cause undesired operation of this device.

Le présent appareil est conforme aux CNR d’lndustrie Canada
applicables aux appareils radio exempts de licence. L’exploitation est
autorisée aux deux conditions suivantes :

1. L’appareil ne doit pas produire de brouillage.

2. L’utilisateur de l’appareil doit accepter tout brouillage radioélectrique

subi, même si le brouillage est susceptible d’en compromettre le
fonctionnement.

WARNING: Changes or modifications not expressly approved by TRW
Automotive U.S. LLC could void the user’s authority to operate the
equipment.

FCC ID: PAXPMVC010

NOTE:
This device complies with part 15 of the FCC Rules. Operation is subject
to the following two conditions: 
(1) This device may not cause harmful interference, and (2) this device
must accept any interference received, including interference that may
cause undesired operation.

FCC WARNING:
Changes or modifications not expressly approved by the party
responsible for compliance could void the user’s authority to operate the
equipment.