2021 TOYOTA 4RUNNER wheel

3044-5. Using the driving support systems
4RUNNER (U)
The rear differential lock system is effective in case one of t he rear
wheels is spinning.
Press the switch to lock the rear
differential.
At this time, the rear differential
lock indicator will flash. Wait a few
seconds for the system to com-
plete operation. After the rear dif-
ferential is locked, the indicator will
stop flashing and remain on.
To unlock the rear differential,
press the switch again.
Rear differential lock system
: If equipped
The rear differential lock system is provided for use only when
wheel spinning occurs in a ditch or on a slippery or rugged sur -
face.

3054-5. Using the driving support systems
4
Driving
4RUNNER (U)
Before using the rear differential lock system:
Stop the vehicle, shift the shift lever to N and shift the front-wheel
drive control lever into L4 to see if this is sufficient. If this has no
effect, additionally use the re ar differential lock system.
Be sure the wheels have stopped spinning.
Press the rear differential lock switch.
Gently depress the accelerator pedal.
After the rear differential is locked, the indicator will come on.
Unlock the rear differential as soon as the vehicle moves.
To unlock the rear different ial, press the switch again.
■Locking the rear differential
The following systems do not operate when the rear differential is locked. It is
normal operation for the ABS warning light and VSC OFF indicato r to be on at
this time.
•ABS
• Multi Terrain ABS
• Brake assist system
•VSC
• Hill-start assist control
■ The rear differential lock is disengaged when
The front-wheel drive control lever or switch is shifted to H2 or H4.
Never forget to turn off the switch after using this feature.
■ After unlocking the rear differential
Check that the indicator goes off.
■ If the rear differential lo ck indicator flashes rapidly
There may be a malfunction in the rear differential lock system . Have the
vehicle inspected by your Toyota dealer immediately.
Using the rear diffe rential lock system
1
2
3
4

3064-5. Using the driving support systems
4RUNNER (U)
WARNING
■To avoid an accident
● Do not use the rear differential lock system except when wheel spinning
occurs in a ditch or on a slippery or rugged surface. Large steering effort
and careful cornering control will be required.
● Do not lock the rear differential until the wheels have stopped spinning.
Otherwise, the vehicle may move in an unexpected direction when the dif-
ferential lock is engaged, resulting in an accident. This may also lead to
possible damage to rear differential lock component parts.
● Do not drive over 5 mph (8 km/h) when the rear differential is locked.
● Do not keep driving with the rear differential lock switch on.

3114-5. Using the driving support systems
4
Driving
4RUNNER (U)■
Speed modes
The following table shows
some typical terrains and the
recommended speed modes.
■
Crawl Control can be operated when
●The engine is running.
● The shift lever is in any position other than P or N.
● The front-wheel drive control lever or switch is in L4.
● The driver’s door is closed.
■ Crawl Control is temporarily canceled when
Vehicle speed exceeds 15 mph (25 km/h). The Crawl Control indic ator
flashes until the vehicle speed is reduced.
ModeRoad condition
L (Low)Rock, mogul (downhill) and gravel
(downhill)
Between L and M
Mogul (uphill)
M (Medium)
Snow, mud, gravel (uphill), sand, dirt,
mogul (uphill) and grassBetween M and H
H (High)
1
2
3
4
5

3124-5. Using the driving support systems
4RUNNER (U)■
Automatic system cancelation
In the following situations, the system will cease operation an d a buzzer will
sound to alert the driver. The Cr awl Control indicator will flash until the system
is turned off completely.
● When the shift lever is shifted to P or N
● When the front-wheel drive control lever or switch is shifted t o H4
● When the driver’s door is opened
● When the system is malfunctioning
● When the brake system overheats
Stop the vehicle in a safe place. (There is no problem with con tinuing normal
driving.)
● When the automatic transmission system overheats
Stop the vehicle in a safe place until the automatic transmissi on fluid tem-
perature warning light goes off.
■ Sounds and vibrations caused by the Crawl Control system
● A sound may be heard from the engine compartment when the engin e is
started or just after the vehicle begins to move. This sound do es not indicate
that a malfunction has occurred in Crawl Control system.
● Either of the following conditions may occur when the Crawl Con trol system
is operating. None of these indicates that a malfunction has occurred.
• Vibrations may be felt through the vehicle body and steering.
• A motor sound may be heard after the vehicle comes to a stop.
■ When there is a malfunction in the system
Warning lights and/or warning messages will turn on. ( P. 474, 484)
WARNING
■When using Crawl Control
● Do not overly rely on Crawl Control. This function does not ext end the
vehicle’s performance limitations. Always check the terrain tho roughly and
drive safely.
● The recommended speed modes for the listed terrains ( P. 311) are only
a reference. The selected mode may not be suitable to actual of f-road con-
ditions due to factors such as the type or unevenness of the te rrain or the
degree of incline. Check the actual terrain thoroughly and drive safely.
● After activating Crawl Control, make sure that the Crawl Contro l indicator
comes on. If the indicator flashes, the vehicle is not under system control.
■ Conditions under which the system may not operate correctly
When driving on the following surfaces, the system may not be a ble to
maintain a fixed low speed, which may result in an accident:
● Extremely steep inclines
● Extremely uneven surfaces
● Snow-covered roads, or other slippery surfaces

3154-5. Using the driving support systems
4
Driving
4RUNNER (U)
The following table shows some typical terrains and the recom-
mended Multi-terrain Select modes.
■Multi-terrain Select can be activated when
●Vehicle speed is approximatel y 7 mph (12 km/h) or less.
● MUD & SAND: The front-wheel drive control lever is in L4 or H4.
LOOSE ROCK, MOGUL and ROCK: The front-wheel drive con-
trol lever is in L4.
● Crawl Control is not operating.
ROCKMOGULLOOSE
ROCKMUD & SAND
Rock
Mogul
Bump,
groove
Slope/
V- di t c h
Uphill/
downhill
Riverbed
Gravel
Bush
Deep snow
Sand
Mud
Dirt
Mode
Road
condition

3174-5. Using the driving support systems
4
Driving
4RUNNER (U)
Depending on switch operation,
one of the following messages
may appear on the multi-informa-
tion display to provide guidance
on transfer mode selection etc:
Messages displayed on the multi-information display
MessageDetailsProcedure
“Select 4WD”
(When selecting MUD
& SAND mode) Indicates that the trans-
fer mode needs to be
changed to H4 or L4.Shift the front-wheel
drive control lever to H4
or L4.
“Select L4”
(When selecting
LOOSE ROCK,
MOGUL or ROCK
mode)
Indicates that the trans-
fer mode needs to be
changed to L4.Shift the front-wheel
drive control lever to
L4.
“Stop the Vehicle. Shift
to N”
(When selecting any
mode)Indicates that the trans-
fer mode cannot be
changed to H4 or L4.Stop the vehicle com-
pletely and/or shift the
shift lever to N.
“Accelerate or Deceler-
ate”
(When shifting the
front-wheel control
lever to H4 or H2)
Indicates that the trans-
fer mode may not suc-
cessfully change.Drive straight ahead
while accelerating or
decelerating, or drive in
reverse.
“Drive the Vehicle a
Short Distance”
(When pressing the
rear differential lock
switch)
Indicates that the rear
differential is not
locked.Drive the vehicle for-
ward or backward a
short distance.

3184-5. Using the driving support systems
4RUNNER (U)
“Operation not avail-
able while multi-terrain
select active”
(When pressing the
VSC off switch or “A-
TRAC” switch)Indicates that VSC and
active traction control
cannot be disabled
while Multi-terrain
Select is operating.
-
“Return the Four-Wheel
Drive Control Switch”
(When shifting the
front-wheel control
lever)
Indicates that the trans-
fer mode cannot be
changed to H4 or L4.Return the front-wheel
control lever to H4 or
L4.
“Cannot be Selected”
(When pressing the
“ON/OFF” switch)
Indicates that Multi-ter-
rain Select cannot be
operated because vehi-
cle speed exceeds
approximately 7 mph
(12 km/h).
Reduce vehicle speed.
“Operation Not Possi-
ble When Crawl Con-
trol Activated”
(When pressing the
“ON/OFF” switch)Indicates that Multi-ter-
rain Select cannot be
operated because
Crawl Control is operat-
ing.
Turn Crawl Control off.
“Multi-terrain select has
been cancelled”
(When pressing the
“ON/OFF” switch)Indicates, along with a
beep, that Multi-terrain
Select has been dis-
abled.
-
“Multi-terrain select not
available”
(When pressing the
“ON/OFF” switch)
Indicates that Multi-ter-
rain Select cannot be
operated because the
VSC and/or 4WD sys-
tem may be malfunc-
tioning.
Contact your Toyota
dealer.
MessageDetailsProcedure