2017 TOYOTA 4RUNNER ECU

4036-3. Do-it-yourself maintenance
6
Maintenance and care
4RUNNER (U)_(OM35B37U)■
Replacing the following bulbs
If any of the lights listed below
has burnt out, have it replaced by
your Toyota dealer.
● Fog light (right side)
● Side turn signal lights
● Stop/tail lights
● Rear side marker lights
● High mounted stoplight
● Outer foot lights (if equipped)
■LED light bulbs
The side turn signal lights, stop/tail lights, rear side marker lights, \
high
mounted stoplight and outer foot lights consist of a number of LEDs. If any
LEDs burn out, take your vehicle to your Toyota dealer to have the light
replaced.
■ Condensation build-up on the inside of the lens
Temporary condensation build-up on the inside of the lens does not indicate a
malfunction. Contact your Toyota dealer for more information in the following
situations:
●Large drops of water have built up on the inside of the lens.
● Water has built up inside the lens.
CAUTION
■Replacing light bulbs
● Turn off the lights. Do not attempt to replace the bulb immediately after
turning off the lights.
The bulbs become very hot and may cause burns.
● Do not touch the glass portion of the light bulb with bare hands. When it is
unavoidable to hold the glass portion, use and hold with a clean dry cloth
to avoid getting moisture and oils on the bulb.
Also, if the bulb is scratched or dropped, it may blow out or crack.
● Fully install light bulbs and any parts used to secure them. Failure to do so
may result in heat damage, fire, or water entering the headlight unit. This
may damage the headlights or cause condensation to build up on the lens.
■ To prevent damage or fire
● Make sure bulbs are fully seated and locked.
● Check the wattage of the bulb before installing to prevent heat damage.

4077-1. Essential information
7
When trouble arises
4RUNNER (U)_(OM35B37U)
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.
Vehicles without a smart key
system: Stop the engine by
turning the engine switch to the
“ACC” position.
Vehicles with a smart key sys-
tem: 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.
If your vehicle has to be stopped in an
emergency
Only in an emergency, such as if it becomes impossible to stop
the vehicle in the normal way, st op the vehicle using the follow-
ing procedure:
1
2
3
4
3
4
Press and hold for 2 seconds or more
or press briefly 3 times or more
4
5

4117-2. Steps to take in an emergency
7
When trouble arises
4RUNNER (U)_(OM35B37U)
If a tow truck is not available in an emergency, your vehicle may be
temporarily towed using cables or chains secured to the emergency
towing eyelet(s). This should only be attempted on hard surfaced
roads for at most 50 miles (80 km) at under 18 mph (30 km/h).
A driver must be in the vehicle to steer and operate the brakes. The
vehicle’s wheels, drive train, axles, steering and brakes must be in
good condition.
Vehicles with front covers only:
Before using the front emer-
gency towing eyelet(s), remove
the cover(s).
Removing the clips
Installing the clips
Emergency towing
Emergency towing procedure
1
1
2

4127-2. Steps to take in an emergency
4RUNNER (U)_(OM35B37U)
Securely attach cables or
chains to the towing eyelet.
Take care not to damage the vehi-
cle body
Vehicles without a smart key system: Enter the vehicle being towed
and start the engine.
If the engine does not start, turn the engine switch to the “ON” posi-
tion.
Vehicles with a smart key system : Enter the vehicle being towed
and start the engine.
If the engine does not start, turn the engine switch to IGNITION ON
mode.
Part-time 4WD models:
Ty p e A
Shift the front-wheel drive control lever to H2.
Ty p e B
Push the “UNLOCK” button and turn the front-wheel drive control
switch to H2.
Full-time 4WD models: Push the “UNLOCK” button and turn the
four-wheel drive control switch to H4F. (The center differential is
unlocked.)
Shift the shift lever to N and release the parking brake.
When the shift lever cannot be shifted: →P. 2 0 4
■While towing
If the engine is not running, the power assist for the brakes and steering will
not function, making steering and braking more difficult.
■ Wheel nut wrench
Wheel nut wrench is stored in the tool bag. ( →P. 433)
2
3
4
5

4147-2. Steps to take in an emergency
4RUNNER (U)_(OM35B37U)
NOTICE
■To prevent damage to the vehicle when towing using a wheel-lift type
truck
● 2WD models without a smart key system: Do not tow the vehicle from the
rear when the engine switch is in the “LOCK” position or the key is
removed. The steering lock mechanism is not strong enough to hold the
front wheels straight.
● 2WD models with a smart key system: Do not tow the vehicle from the rear
when the engine switch is off. The steering lock mechanism is not strong
enough to hold the front wheels straight.
● When raising the vehicle, ensure adequate ground clearance for towing at
the opposite end of the raised vehicle. Without adequate clearance, the
vehicle could be damaged while being towed.
■ To prevent damage to the vehicle wh en towing with a sling-type truck
Do not tow with a sling-type truck, either from the front or rear.
■ To prevent damage to the vehic le during emergency towing
Do not secure cables or chains to the suspension components.

4217-2. Steps to take in an emergency
7
When trouble arises
4RUNNER (U)_(OM35B37U)
*1: Parking brake engaged warning buzzer:A buzzer will sound if the vehicle is driven at a speed of approximately \
3
mph (5 km/h) or more.
*2: Open door warning buzzer:The open door warning buzzer sounds to alert one or more of the doors is
not fully closed (with the vehicle having reached a speed of 3 mph [5 km/h]).
*3: Driver’s and front passenger’s seat belt buzzer: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 10 seconds after the vehicle reaches a
speed of 12 mph (20 km/h). Then, if the seat belt is still unfastened, the
buzzer will sound in a different tone for 20 more seconds.
■ SRS warning light
This warning light system monitors the airbag sensor assembly, front impact
sensors, side impact sensors (front door), side impact sensors (rear), safing
sensor (rear), driver's seat belt buckle switch, front passenger occupant clas-
sification system (ECU and sensors) , “AIR BAG ON” and “AIR BAG OFF”
indicator lights, front passenger's seat belt buckle switch, seat belt p\
reten-
sioners, airbags, interconnecting wiring and power sources. (→P. 3 5 )
■ Key reminder buzzer (vehicles without a smart key system)
The buzzer indicates that the key has not been removed with the engine off
and the driver’s door opened.
■ Open moon roof reminder buzzer (if equipped)
The buzzer indicates that the moon roof is not fully closed with the engine off
and the driver’s door opened.
■ Front passenger detection sensor, passenger seat belt reminder and
warning buzzer
● If luggage is placed on the front passenger seat, the front passenger de\
tec-
tion sensor may cause the warning light to flash and the warning buzzer to
sound even if a passenger is not sitting in the seat.
● If a cushion is placed on the seat, the sensor may not detect a passenger,
and the warning light may not operate properly.
■ If the malfunction indicator la mp comes on while driving
First check the following:
● Is the fuel tank empty?
If it is, fill the fuel tank immediately.
● Is the fuel tank cap loose?
If it is, tighten it securely.
The light will go off after several driving trips.
If the light does not go off even after several trips, contact your Toyota dealer
as soon as possible.

4307-2. Steps to take in an emergency
4RUNNER (U)_(OM35B37U)
Con-
tinu-
ousCon-
tinu-
ous
The driver’s door was opened
and closed while the electronic
key was not in the vehicle, the
shift lever was not in P and the
engine switch was not turned
off.
→Shift the shift lever to P.
Bring the electronic key
back into the vehicle.
Once
Con-
tinu-
ous
An attempt was made to lock
the doors using the smart key
system while the electronic key
was still inside the vehicle.
→Retrieve the electronic key
from the vehicle and lock
the doors again.
⎯
Con-
tinu-
ous
An attempt was made to lock
either front door by opening a
door and putting the inside lock
button into the lock position,
then closing the door by pulling
on the outside door handle with
the electronic key still inside the
vehicle.
→Retrieve the electronic key
from the vehicle and lock
the doors again.
Once⎯
• When the doors were
unlocked with the mechani-
cal key and then the engine
switch was pressed, the
electronic key could not be
detected in the vehicle.
• The electronic key could
not be detected in the vehi-
cle even after the engine
switch was pressed two
consecutive times.
→ Touch the electronic key to
the engine switch while
depressing the brake
pedal.
Interior
buzzerExterior
buzzerWarning messageDetails/Actions
(Displayed alternately)
(Flashes)
(Flashes)
(Flashes)
(Flashes)

4357-2. Steps to take in an emergency
7
When trouble arises
4RUNNER (U)_(OM35B37U)
CAUTION
■Using the tire jack
Improper use of the tire jack may cause the vehicle to suddenly fall off
the jack, leading to death or serious injury.
●Do not use the tire jack for any purpose other than replacing tires or
installing and removing tire chains.
●Only use the tire jack that comes with this vehicle for replacing a flat
tire.
Do not use it on other vehicles, and do not use other tire jacks for
replacing tires on this vehicle.
●Always check that the tire jack is securely set to the jack point.
●Do not put any part of your body under the vehicle while it is supported
by the jack.
●Do not start or run the engine while your vehicle is supported by the
jack.
●Do not raise the vehicle while someone is inside.
●When raising the vehicle, do not put an object on or under the jack.
●Do not raise the vehicle to a height greater than that required to
replace the tire.
●Use a jack stand if it is necessary to get under the vehicle.
Vehicles with Automatic running boards
●Observe the following precautions. Failu re to do so may result in seri-
ous injury:
• When jacking up the vehicle, always turn the Automatic running boards switch off.
• When jacking up the vehicle, do not use an Automatic running board
as a jack point. The Automatic running board may break, causing
injuries.
Take particular care when lowering the vehicle to ensure that no one
working on or near the vehicle may be injured.
■Using the jack handle
Tighten all the jack handle bolts securely using a Phillips-head screw-
driver, to prevent the extension parts from coming apart unexpectedly.