2017 TOYOTA HILUX differential

3724-5. Using the driving support systems
HILUX_OM_OM0K322E_(EE)
■Four-wheel drive usage frequency (vehicles with A.D.D.)
You should drive in four-wheel drive for at least 16 km (10 miles) each month.
This will assure that the front drive components are lubricated.
■ Shifting between H2 and H4
If you have trouble shifting in cold w eather, reduce your speed or stop the
vehicle and reshift.
■ Shifting to L4 (vehicles with VSC)
VSC is automatically turned off.
■ When driving on dry paved surface roads and expressway
Use H2 position. If the vehicle is driven in H4 or L4 position for a long time, a
warning buzzer sounds, and the four-wheel drive indicator light flashes rap-
idly or a warning message is shown on the multi-information display. If the
warning message is shown on the multi-information display, follow the mes-
sage.
■ If “DIFFERENTIAL OIL TEMP HIGH SHIFT TO 2WD MODE COOLING TIME
REQUIRED”/“Differential oil temp high Shift to 2WD mode Cooling time
required” is shown on the multi-info rmation display (vehicles with multi-
information display)
The differential oil temperature is too high.
Turn the front-wheel drive control switch to H2, and wait until the warning
message goes off.
WARNING
■ While driving
● Never turn the front-wheel drive control switch from H2 to H4 if the wheels
are slipping. Stop the slipping or spinning before shifting.
● For normal driving on dry and hard surface roads, use H2 position. Driving
on dry and hard surface roads in H4 or L4 position may cause drive com-
ponent oil leakage, seizure, or other problems resulting in an accident.
Further, it may cause tire wear and increased fuel consumption.
● Avoid turning suddenly in H4 or L4 position. If you do turn suddenly, the
difference in turning speeds between the front and rear wheels may have
a similar effect to braking, thus making driving difficult.

373
4
4-5. Using the driving support systems
Driving
HILUX_OM_OM0K322E_(EE)
Rear differential lock system
Press the rear differential lock
switch to lock the rear differential.
The rear differential lock indicator
comes on.
To unlock the rear differential, push
the switch again.
: If equipped
The rear differential lock system is provided for use only when
wheel spinning occurs in a ditch or on a slippery or ragged sur-
face.
This differential lock system is effective in case one of the rear
wheels is spinning.

3744-5. Using the driving support systems
HILUX_OM_OM0K322E_(EE)
4WD models only: Before using
the rear differential lock system,
turn the front-wheel drive con-
trol switch to L4 and try to move
the vehicle. ( P. 366, 369)
If this is not sufficient, use the rear
differential lock system as well.
Reduce the vehicle speed to
less than 8 km/h (5 mph).
Make sure that the wheels are not
spinning.
Press the rear differential lock
switch.
The rear differential lock indicator
flashes while the rear differential is
being locked.
If pressing the rear differential lock
switch without following steps
and , the rear differential lock
indicator flashes three times and a
buzzer sounds three times, and the
rear differential cannot be locked.
Try steps and again.
Using the rear differential lock system
1
8 km/h (5 mph)
2
(Flashes)
3
1
2
12

3754-5. Using the driving support systems
4
Driving
HILUX_OM_OM0K322E_(EE)
Gently depress the accelerator
pedal.
Check that the rear differential
lock indicator comes on.
The rear differential lock indicator
comes on when locking the rear
differential is completed.
If the rear differential lock indicator
does not stop flashing after press-
ing the rear differential lock switch,
perform any of the followings while
turning the steering wheel left and
right.
• Accelerating
• Decelerating
Unlock the rear differential as soon as the vehicle moves. To unlock
the rear differential, push the switch again.
4
(Comes on)
5

3764-5. Using the driving support systems
HILUX_OM_OM0K322E_(EE)
■Locking the rear differential
The following systems do not operate w hen the rear differential is locked.
It is normal operation for the ABS warning light, VSC OFF indicator (if
equipped) and “TRC OFF” indicator (if equipped) to be on or for “TRC
TURNED OFF”/“TRC turned off” to be displayed on the multi-information dis-
play (if equipped) at this time.
•ABS
• Brake assist (if equipped)
• VSC (if equipped)
• TRC/A-TRC (if equipped)
• Trailer Sway Control (if equipped)
• Hill-start assist control (if equipped)
• Downhill assist control (if equipped)
■ For easy unlocking
Slightly turn the steering wheel in either direction while the vehicle is in
motion.
■ Automatic system cancelation of the rear differential lock system
The rear differential lock is also unlocked in any of the following situations:
● The front-wheel drive control switch is turned to H2 or H4 (4WD models)
● The engine switch is turned to the “ACC” or “LOCK” position (vehicles with-
out smart entry & start system) or A CCESSORY or off (vehicles with smart
entry & start system)
■ After unlocking the rear differential
Check that the indicator goes off.
WARNING
■ To avoid an accident
Failure to observe the following precautions may result in 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 8 km/h (5 mph) when the differential is locked.
● Do not keep driving with the rear differential lock switch on.

3964-5. Using the driving support systems
HILUX_OM_OM0K322E_(EE)
■Operating tips (vehicles with automatic transmission)
The system will operate when the shift lever is in a position other than P, how-
ever to make effective use of the system it is recommended to select a lower
shift range.
■ The system will not operate when
● The transfer mode is in H2.
● The rear differential is locked. (if equipped)
■ If the downhill assist control system indicator flashes
● In the following situations, the indicator flashes and the system will not oper-
ate:
• The transfer mode is not in L4 or H4.
• The rear differential is locked. (if equipped)
• The shift lever is in P. (vehicles with automatic transmission)
• The accelerator or brake pedal is depressed.
• The vehicle speed exceeds approximately 30 km/h (18 mph).
• The brake system overheats.
● In the following situations, the indicator flashes to alert the driver, but the
system will operate:
• The shift lever is in N. (vehicles with automatic transmission)
• The clutch pedal is depressed. (vehicles with manual transmission)
• The “DAC” switch is turned off while the system is operating.
The system will gradually ceases operat ion. The indicator will flash during
operation, and then go off when the system is fully off.
■ When the downhill assist control system is operated continuously
This may cause the brake actuator to overheat. In this case, the downhill
assist control system will stop operating, a buzzer will sound and the downhill
assist control system indicator will start flashing, and “TRC turned off” is
shown on the multi-information display. Refrain from using the system until
the downhill assist control system indicator stays on and “TRC turned off” dis-
played on the multi-information display goes out. (The vehicle can be driven
normally during this time.)
■ Sounds and vibrations caused by the downhill assist control system
● A sound may be heard from the engine compartment when the engine is
started or just after the vehicle begins to move. This sound does not indicate
that a malfunction has occurred in downhill assist control system.
● Either of the following conditions may occur when the downhill assist control
system is operating. None of these are indicators 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.

6128-2. Steps to take in an emergency
HILUX_OM_OM0K322E_(EE)
Four-wheel drive indicator light (warning buzzer)*3 (if
equipped)
Indicates that the differential oil temperature is too high
when the light flashes rapidly and a buzzer sounds.
 Turn the front-wheel drive control switch to H2, and
wait until the warning light goes off.
Indicates a malfunction in the four-wheel drive system
when the light flashes rapidly and a buzzer does not
sound.
 Have the vehicle inspected by any authorized Toyota
retailer or Toyota authorized repairer, or any reliable
repairer immediately.
Low speed four-wheel drive indicator light (if equipped)
Indicates a malfunction in the four-wheel drive system
when the light flashes rapidly.
 Have the vehicle inspected by any authorized Toyota
retailer or Toyota authorized repairer, or any reliable
repairer immediately.
Rear differential lock indicator light (if equipped)
Indicates a malfunction in the rear differential lock system
when the light flashes rapidly.
 Have the vehicle inspected by any authorized Toyota
retailer or Toyota authorized repairer, or any reliable
repairer immediately.
Timing belt replacement warning light (if equipped)
Indicates that the timing belt should be replaced
 Have the vehicle inspected by any authorized Toyota
retailer or Toyota authorized repairer, or any reliable
repairer.
Fuel system warning light (warning buzzer)*4 (if
equipped)
The amount of accumulated water in the fuel filter has
reached the specified level if the light flashes.
 P. 560
The fuel filter need to be replaced if the light comes on.
 Have the vehicle inspected by any authorized Toyota
retailer or Toyota authorized repairer, or any reliable
repairer immediately.
Warning lightWarning light/Details/Actions

6158-2. Steps to take in an emergency
HILUX_OM_OM0K322E_(EE)
8
When trouble arises
*1: The buzzer sounds if the vehicle reaches a speed of 5 km/h (3 mph).
*2: Slow down until the lamp goes off.
*3: The buzzer sounds when the differential oil temperature is too high and
turning the front-wheel drive control switch to H2 is required.
*4: The buzzer will sound at the same time the warning light flashes.
*5: The open door warning buzzer sounds if the vehicle reaches or exceeds a
speed of 5 km/h (3 mph).
*6: The driver’s and front passenger’s seat belt buzzer sounds to alert the
driver and front passenger that his or her seat belt is not fastened. The
buzzer sounds intermittently for 30 seconds after the vehicle reaches a
speed of 20 km/h (12 mph). Then, if the seat belt is still unfastened, the
buzzer will sound in a different tone for 90 more seconds.
*7: The rear passengers’ seat belt buzze r sounds to alert the rear passenger
that his or her seat belt is not fastened. The buzzer sounds intermittently
for 30 seconds after the vehicle reaches a speed of 20 km/h (12 mph).
Then, if the seat belt is still unfastened, the buzzer will sound in a different
tone for 90 more seconds.
*8: The parking brake engaged warning buzzer sounds if the vehicle reaches a
speed of approximately 5 km/h (3 mph) or more.
(Flashes)
Stop & Start cancel indicator (if equipped)
Indicates a malfunction in the Stop & Start system
(The Stop & Start cancel indicator will come on when the
system is canceled: P. 378)
 Have the vehicle inspected by any authorized Toyota
retailer or Toyota authorized repairer, or any reliable
repairer immediately.
Parking brake indicator light (warning buzzer)*8
Warns the driver to release parking brake.
 Release the parking brake.
Low AdBlue™ level warning light (if equipped)
Indicates that AdBlue™ level is low
 Have AdBlue™ refilled at any authorized Toyota
retailer or Toyota authorized repairer, or any reliable
repairer.
Warning lightWarning light/Details/Actions