wheel TOYOTA SEQUOIA 2021 (in English) Workshop Manual

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AVS (Adaptive Variable Suspension System)
Sport mode
For winding mountain road driving
or high speed driving.
Normal mode
For ordinary driving.
Comfort mode
For driving on a bumpy road.
■Driving mode
●Sport mode is suitable for winding mountain road driving, high speed driving
or towing a trailer.
● Normal mode is suitable for ordinary driving.
: If equipped
AVS controls the suspension accord ing to the road and driving condi-
tions. Selecting an optimum drivi ng mode allows good vehicle posture
and steering wheel operation.
AVS switch

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Four-wheel drive system
“2WD” (high speed position, two-wheel drive)
Use this for normal driving on dry hard-surfaced roads. This position gives
greater economy, quietest ride and least wear.
“4H” (high speed position, four-wheel drive)
Use this for driving only on tracks that permit the tires slide , like off-road,
icy or snow-covered roads. This position provides greater tract ion than
two-wheel drive.
The “4HI” indicator will come on.
“4L” (low speed position, four-wheel drive)
Use this for maximum power and traction. Use “4L” for climbing or
descending steep hills, off-road driving, and hard pulling in s and, mud or
deep snow.
The “4LO” indicator will come on.
Center differentia l lock switch (P. 316)
Indicators
Use the front-wheel drive control lever or switch to select the fol-
lowing transfer modes:

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Shifting from “2WD” to “4H”
Reduce vehicle speed to less than 62 mph (100 km/h).
Turn the front-wheel drive control switch to “4H”.
The “4HI” indicator will turn on.
■
Shifting from “4H” to “2WD”
Reduce vehicle speed to less than 62 mph (100 km/h).
Turn the front-wheel drive control switch to “2WD”.
The “4HI” indicator will go off.
■
Shifting from “4H” to “4L” Stop the vehicle completely and continue to depress the brake
pedal.
Shift the shift lever to N.
Push and turn the front-wheel drive control switch to “4L”.
The “4LO” indicator will turn on.
■
Shifting from “4L” to “4H”
Stop the vehicle completely and continue to depress the brake
pedal.
Shift the shift lever to N.
Turn the front-wheel drive control switch to “4H”.
The “4LO” indicator will go off.
Use the center differential lock
system if your wheels get stuck in
a ditch, or when you are driving on
a slippery or bumpy surface.
Unlock the center differential after
the wheels have been freed, or
after moving to a flat, non-slippery
surface.
Shifting between “2WD” and “4H”
Shifting between “4H” and “4L”
Center differential lock switch
1
2
1
2
1
2
3
1
2
3

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■Shifting between “2WD” and “4H”
●When the ambient temperature is 5.0 °F (-15 °C) or lower, shifting from
“2WD” to “4H” cannot be performed with the vehicle speed above 43 mph
(70 km/h).
● If the “4HI” indicator does not go off when you shift from “4H” to “2WD”, drive
straight ahead while accelerating or decelerating, or drive in reverse.
■ Front-wheel drive usage frequency
You should drive in front-wheel drive for at least 10 miles (16 km) each
month.
This will assure that the front drive components are lubricated .
■ The center differential lock switch can be operated when
●The front-wheel drive control switch is in the “4H” or “4L” pos ition.
● The vehicle speed is less than 62 mph (100 km/h)
■ Center differential lock system
●When the front-wheel drive control switch is in the “4L” positi on and the cen-
ter differential is locked, the VSC is automatically turned off .
● When the front-wheel drive control switch is turned to the “2WD ” position,
the center differential is automatically unlocked.
● If the operation is not completed, the center differential lock indicator blinks.
If the indicator does not go off when unlocking the center diff erential, drive
straight ahead while accelerating or decelerating, or drive in reverse.

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If the “4LO” indicator, “4HI” indicator or the center different ial lock indi-
cator blinks
● If the “4LO” indicator continues to blink when shifting between “4H” and “4L”,
stop the vehicle completely, move the shift lever to N and oper ate the switch
again.
● If the shift lever is moved before the “4LO” indicator turns on /off, the transfer
mode may not be shifted completely. The transfer mode disengage s both
the front and rear driveshafts from the powertrain and allows the vehicle to
move regardless of the shift position. (At this time, the indic ator blinks and
the buzzer sounds.)
Therefore, the vehicle is free to roll even if the automatic tr ansmission is in
P. You or someone else could be seriously injured. You must complete the
shifting of the transfer mode.
To complete the shifting, stop the vehicle completely, return t he shift lever to
N, and confirm that the shift was completed (The indicator turn s on/off).
● If the engine coolant temperature is too low, transfer mode may not be able
to shift. When the engine is warmer, turn the switch again.
If the “4LO” indicator, “4HI” i ndicator or the center different ial lock indicator
continues to blink even after attempting the above, there may b e a malfunc-
tion in the engine, the brake system or the four-wheel drive sy stem. In this
case, you may not be able to shift between “2WD” and “4H”, “4H” and “4L”,
and the center differential lock may not be operable. Have the vehicle
inspected by your Toyota dealer immediately.
■ Shifting to the “4L” position
The VSC off indicator will come on.
If the center differential is locked, VSC is automatically turn ed off.

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WARNING
■Shifting the front-wheel drive control switch from “2WD” to “4H ” while
driving
Never operate the front-wheel drive control switch if the wheel s are slipping.
Stop the slipping or spinning before shifting.
■ When the vehicle is parked
If the shift lever is moved before the “4LO” indicator turns on/off, the transfer
mode may not be shifted completely. The transfer mode disengage s both
the front and rear driveshafts from the powertrain and allows t he vehicle to
move regardless of the shift position. (At this time, the indic ator blinks and
the buzzer sounds.)
Therefore, the vehicle is free to roll even if the automatic tr ansmission is in
P. You or someone else could be seriously injured. You must com plete the
shifting of the transfer mode before placing transmission in P. (P. 318)
NOTICE
■ To prevent damage to the center differential
● For normal driving on dry and hard surface roads, unlock the ce nter differ-
ential.
● Unlock the center differential after the wheels are out of the ditch or off the
loose or bumpy surface.
● Do not push the center differential lock switch when the vehicl e is corner-
ing or when its wheels are spinning freely off the ground.

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AUTO LSD system
The system can be used on 2WD models and in 2WD mode on 4WD
models.
The system is activated when driving at a speed under 62 mph
(100 km/h).
The AUTO LSD system will be activated with the following two pr oce-
dures.
■TRAC off mode
Press briefly to turn on the
system. The “AUTO LSD” indi-
cator will come on.
To turn off the system, press
again.
■
AUTO LSD mode
Stop the vehicle completely,
and press for more than 3
seconds. The “AUTO LSD” and
VSC off indicators will come on.
To turn off the system, press
again.
The AUTO LSD system aids trac tion by using the traction con-
trol system to control engine performance and braking when
one of the drive wheels begins to spin.
The system should be used only when one of the drive wheels
spinning occurs in a ditch or rough surface.
System operation

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■If the engine is turned off and restarted
The AUTO LSD system and the indicators are automatically turned off.
■ Reactivation of the VSC syst em linked to vehicle speed
When the AUTO LSD system is turned on, the VSC and TRAC systems will
turn on automatically if vehicle speed increase.
■ If the brake system overheats
The system will cease operation and a buzzer will alert the driver. At this time,
the “TRAC OFF” indicator will come on. Stop the vehicle in a safe place.
(There is no problem with continuing normal driving.) The syste m will be auto-
matically restored after a short time.
WARNING
■ To avoid an accident
Failure to do so, a much greater steering effort and more careful cornering
control will be required.
● Do not use the AUTO LSD system in conditions other than when on e of
the drive wheels spinning occurs in a ditch or rough surface.
● Do not drive with the AUTO LSD system continuously turned on.
NOTICE
■Activating while driving
Do not activate the AUTO LSD system if the wheel is slipping. Stop the slip-
ping or spinning before activating.

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Driving assist systems
◆ABS (Anti-lock Brake System)
Helps to prevent wheel lock when the brakes are applied suddenl y,
or if the brakes are applied while driving on a slippery road surface
◆Brake assist
Generates an increased level of braking force after the brake p edal
is depressed when the system de tects a panic stop situation
◆VSC (Vehicle Stability Control)
Helps the driver to control skidding when swerving suddenly or
turning on slippery road surfaces
◆Trailer Sway Control
Helps the driver to control trailer sway by selectively applying brake
pressure for individual wheels and reducing driving torque when
trailer sway is detected.
◆TRAC (Traction Control)
Helps to maintain drive power and prevent the drive wheels from
spinning when starting the vehicl e or accelerating on slippery roads
◆Hill-start assist control
Helps to reduce the backward movement of the vehicle when start -
ing on an uphill
To keep driving safety and perf ormance, the following systems
operate automatically in respon se to various driving situations.
Be aware, however, that these systems are supplementary and
should not be relied upon too heav ily when operating the vehi-
cle.

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The slip indicator will flash while
the TRAC/VSC/Trailer Sway Con-
trol systems are operating.
If the vehicle gets stuck in mud, dirt or snow, the TRAC system may
reduce power from the engi ne to the wheels. Pressing
to turn the
system off may make it easier for you to rock the vehicle in or der to
free it.
2WD models and 2WD mode on 4WD models
To turn the TRAC system off,
quickly press and release
.
The “AUTO LSD” indicator light
will come on.
Press
again to turn the sys-
tem back on.
When the TRAC/VSC/Trailer Sway control systems are operating
Disabling the TRAC system