traction control TOYOTA SEQUOIA 2003 1.G User Guide

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In the following cases, contact your Toyota
dealer:
The warning light does not come on
after the ignition key is turned to “ON”.
The warning light remains on after the
ignition key is turned to “ON”.
The warning light comes on while driv-
ing.The active traction control system auto-
matically helps prevent the spinning of
4 wheels (4WD mode) or rear wheels
(2WD mode) when the vehicle is started
or accelerated on slippery road sur-
faces.
When the ignition key is turned to “ON”,
the system automatically turns on.
CAUTION
Under certain slippery road condi-
tions, full traction of the vehicle and
power against 4 wheels (4WD mode)
or rear wheels (2WD mode) cannot be
maintained, even though the active
traction control system is in opera-
tion. Do not drive the vehicle under
any speed or maneuvering conditions
which may cause the vehicle to lose
traction control. In situations where
the road surface is covered with ice
or snow, your vehicle should be fitted
with snow tires or tire chains. Always
drive at an appropriate and cautious
speed for the present road condi-
tions.
Leave the system on during the ordi-
nary driving so that it can operate
when needed.
You may hear a sound in the engine
compartment for a few seconds when the
engine is started or just after the vehicle
begins to move. This means that the ac-
tive traction control system is in the self
check mode, but does not indicate a mal-
function.
Active traction control system
(fourwheel drive models)

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When the traction control system is oper-
ating, the following conditions occur:
The system controls the spinning of the
4 wheels (4WD mode) or rear wheels
(2WD mode). At this time, the slip indi-
cator light blinks.
You may feel vibration or noise in your
vehicle, caused by operation of the
brakes. This indicates the system is
functioning properly.
The slip indicator light comes on for a few
seconds when the ignition key is turned
to “ON”. If the indicator light does not
come on when the ignition is turned on,
contact your Toyota dealer.
“VSC/TRAC” warning light
This light warns that there is a problem
somewhere in the active traction control
system or the vehicle skid control system.
The warning light will come on when the
ignition key is turned to “ON” and will go
off after a few seconds. The brake pad or actuator temperature
increases during continuous operation of
the active traction control system or ve-
hicle skid control system such as on slip-
pery roads. If the brake pad or actuator
temperature becomes too high while the
active traction control system or vehicle
skid control system is operating, a buzzer
will start to sound intermittently to indicate
that the active traction control system can
no longer operate. In this case, stop your
vehicle immediately at a safe place.
If the system continues to operate, the
buzzer sound changes from intermittent to
continuous. (The continuous buzzer
sounds for about 3 seconds.)
At the time, the “VSC/TRAC” warning light
will come on and the active traction con-
trol system temporarily stops operating in
order to protect the brake pad. (Although
the active traction control system does not
operate, there is no problem to continue
your driving.) The system will be automati-
cally restored after a short time and the
warning light goes out.
If the light comes on while driving, the
active traction control system does not
work. However, as conventional braking
operates when applied, there is no prob-
lem to continue your driving.

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In the following cases, contact your Toyota
dealer:
The warning light does not come on
after the ignition key is turned to “ON”.
The warning light remains on after the
ignition key is turned to “ON”.
The warning light comes on while driv-
ing.The vehicle skid control system helps
provide integrated control of the sys-
tems such as antilock brake system,
traction control, engine control, etc.
This system automatically controls the
brakes and engine to help prevent the
vehicle from skidding when cornering
on a slippery road surface or operating
steering wheel abruptly.
The vehicle skid control activates when
the vehicle speed is more than the follow-
ing speed.
Front drive control lever in “H”
15 km/h (9 mph)
Front drive control lever in “L4” 30 km/h (18 mph)
You may hear a sound in the engine
compartment for a few seconds when the
engine is started or just after the vehicle
begins to move. This means that the sys-
tem is in the selfcheck mode but does
not indicate a malfunction.
CAUTION
Do not rely excessively on the ve-
hicle skid control system. Even if
the vehicle skid control system is
operating, you must always drive
carefully and attentively to avoid
serious injury. Reckless driving will
result in an unexpected accident. If
the slip indicator light blinks,
sounding an alarm sounds, special
care should be taken while driving.
Only use tires of specified size. The
size, manufacturer, brand and tread
pattern for all 4 tires should be the
same. If you use the tires other
than specified, or different type or
size, the vehicle skid control sys-
tem may not function correctly.
When replacing the tires or wheels,
contact your Toyota dealer. (See
“Checking and replacing tires” on
page 364 in Section 72.)
Vehicle skid control system

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“VSC/TRAC” warning light
This light warns that there is a problem
somewhere in the vehicle skid control sys-
tem, traction control system (twowheel
drive models) or active traction control
system (fourwheel drive models).
The warning light will come on when the
ignition key is turned to “ON” and will go
off after a few seconds.
If the light comes on while driving, the
system does not work. However, as con-
ventional braking operates when applied,
there is no problem to continue your driv-
ing. In the following cases, contact your Toyota
dealer:
The warning light does not come on
after the ignition key is turned to “ON”.
The warning light remains on after the
ignition key is turned to “ON”.
The warning light comes on while driv-
ing.
When parking, firmly apply the parking
brake to avoid inadvertent creeping.
To set: Fully depress the parking brake
pedal. For better holding power, first de-
press the brake pedal and hold it while
setting the parking brake.
To release: Depress the parking brake
pedal once again.
To remind you that the parking brake is
set, the parking brake reminder light in
the instrument panel remains on until you
release the parking brake.
Parking brake

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“ABS” warning light
The light comes on when the ignition key
is turned to the “ON” position. If the anti
lock brake system and the brake assist
system work properly, the light turns off
after a few seconds. Thereafter, if either
of the systems malfunctions, the light
comes on again.
When the “ABS” warning light is on (and
the brake system warning light is off), the
antilock brake system, the brake assist
system and the traction control system
and/or the vehicle skid control system do/
does not operate, but the brake system
still operates conventionally.
When the “ABS” warning light is on (and
the brake system warning light is off), the
antilock brake system does not operate
so that the wheels could lock up during
a sudden braking or braking on slippery
road surfaces.If either of the following conditions
occurs, this indicates a malfunction
somewhere in the parts monitored by
the warning light system. Contact your
Toyota dealer as soon as possible to
service the vehicle.
The light does not come on when the
ignition key is turned to the “ON” posi-
tion, or remains on.
The light comes on while you are dri-
ving.
A warning light turning on briefly during
operation does not indicate a problem.
CAUTION
If the “ABS” warning light remains on
together with the brake system warn-
ing light, immediately stop your ve-
hicle at a safe place and contact your
Toyota dealer.
In this case, not only the antilock
brake system will fail but also the
vehicle will become extremely unsta-
ble during braking.
DRUMINDISC TYPE PARKING BRAKE
SYSTEM
Your vehicle has a drumindisc type
parking brake system. This type of brake
system n eeds beddingdown of the brake
shoes periodically or whenever the parking
brake shoes and/or drums are replaced.
Have your Toyota dealer perform the bed-
dingdown.
BRAKE ASSIST SYSTEM
When you slam the brakes on, the
brake assist system judges as an emer-
gency stop and provides more powerful
braking for a driver who cannot hold
down the brake pedal firmly.
When you slam the brakes on, more pow-
erful braking will be applied. At this time,
you may hear a sound in the engine
compartment and feel the vibrations of the
brake pedal. This does not indicate a mal-
function.
The brake assist system becomes opera-
tive after the vehicle has accelerated to
a speed in excess of approximately 10
km/h (6 mph). It stops operating when the
vehicle decelerates to a speed below
approximately 5 km/h (3 mph).

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11. Check the air pressure of the re-placed tire.
Adjust the air pressure to the specification
designated on page 388 in Section 8. If
the pressure is lower, drive slowly to the
nearest service station and fill to the cor-
rect pressure.
Do not forget to reinstall the tire inflation
valve cap as dirt and moisture could get
into the valve core and possibly cause air
leakage. If the cap is missing, have a new
one put on as soon as possible.
12. Restow all the tools, jack and flat tire securely.
With a spare tire of the same wheel type
as the installed tires—
As soon after changing wheels as pos-
sible, tighten the wheel nuts to the torque
specified on page 388 in Section 8 with
a torque wrench. Have a technician repair
the flat tire.
With a spare tire of different wheel type
from the installed tires—
As soon after changing wheels as pos-
sible, tighten the wheel nuts to the torque
specified on page 388 in Section 8 with
a torque wrench. Have a technician repair
the flat tire and replace the spare tire with
it.CAUTION
Before driving, make sure all the
tools, jack and flat tire are securely
in place in their storage location to
reduce the possibility of personal in-
jury during a collision or s udden
braking.
If your vehicle becomes stuck in snow,
mud, sand, etc., then you may attempt
to rock the vehicle free by moving it
forward and backward.
Twowheel drive models—Turn off the
traction control system to become un-
stuck to allow the tires to spin enough
to remove the vehicle from the obstruc-
tion. (For details, see “Traction control
system” on page 151 in Section 16.)
CAUTION
Do not attempt to rock the vehicle
free by moving it forward and back-
ward if people or objects are any-
where near the vehicle. During the
rocking operation the vehicle may
suddenly move forward or backward
as it becomes unstuck, causing injury
or damage to nearby people or ob-
jects.
—After changing wheels If your vehicle becomes stuck

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WHEN TO USE SNOW TIRES OR
CHAINS
Snow tires or chains are recommended
when driving on snow or ice.
On wet or dry roads, conventional tires
provide better traction than snow tires.
SNOW TIRE SELECTION
If you need snow tires, select tires of
the same size, construction and load
capacity as the originally installed tires.
Also, on fourwheel drive models, all
the tires must be the same brand and
have the same tread patterns.
Do not use tires other than those men-
tioned above. Do not install studded tires
without first checking local regulations for
possible restrictions.
CAUTION
Observe the following instructions.
Otherwise, an accident may occur re-
sulting in death or serious injuries.
Do not use snow tires other than
the manufacturer ’s recommended si-
ze, as this may cause dangerous
handling characteristics resulting in
loss of control.
Fourwheel drive models:
Do not use snow tires of different
brands, sizes, construction or tread
patterns, as this may cause danger-
ous handling characteristics result-
ing in loss of control.
SNOW TIRE INSTALLATION
Snow tires should be installed on all
wheels.
Installing snow tires on the front wheels
only can lead to an excessive difference
in road grip capability between the front
and rear tires which could cause loss of
vehicle control.
When storing removed tires, you should
store them in a cool dry place.
Mark the direction of rotation and be sure
to install them in the same direction when
replacing.
CAUTION
Do not drive with the snow tires
incorrectly inflated.
Never drive over 120 km/h (75 mph)
with any type of snow tires.
TIRE CHAIN SELECTION
Use the tire chains of correct size.
Regulations regarding the use of tire
chains vary according to location or
type of road, so always check the local
regulations before installing chains.
CHAIN INSTALLATION
Install the chains on the rear tires as
tightly as possible. Do not use tire
chains on the front tires. Retighten
chains after driving 0.5—1.0 km
(1/4—1/2 mile).
When installing chains on your tires, care-
fully follow the instructions of the chain
manufacturer.
If wheel covers are used, they will be
scratched by the chain band, so remove
the covers before putting on the chains.
Installing snow tires and
chains

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20. AM2 25 A: Starting system, multiport
fuel injection system/sequential multi-
port fuel injection system, electronic
throttle control system, “IGN 1” and
“IGN 2” fuses
21. TURNHAZ 20 A: Turn signal lights,
emergency flashers
22. RAD NO.3 20 A: Car audio/video sys-
tem
23. ST 30 A: Starting system, “STA” fuse
24. HORN 10 A: Horns
25. EFI NO.2 10 A: Multiport fuel injection
system/s equential multiport fuel injec-
tion system, electronic throttle control
system
26. DOME 10 A: Center interior and per-
sonal lights, personal lights, luggage
compartment light, air conditioning sys-
tem, wireless remote control system,
garage door opener, ignition switch
light, door courtesy lights, foot light,
vanity lights, power antenna 27. ECUB 7.5 A:
Multiplex communication
system (power door lock system, secu-
rity system, autodoor locking system,
automatic light control system, head-
light delay off system, tail light auto
cut system, illuminated entry system,
daytime running light system), back
door lock system, driver and front pas-
senger door lock system, gauges and
meters
28. MIR HTR 15 A: Outside rear view mir-
ror heaters
29. RAD NO.1 25 A: Car audio system
30. TAIL 15 A: Tail lights, back door cour-
tesy light, license plate lights
31. ECUIG 10 A: Charging system, cruise
control system, antilock brake system,
vehicle skid control system, traction
control system (twowheel drive mod-
els), active traction control system
(fourwheel drive models), electronical-
ly controlled automatic transmission
system, power antenna, electric moon
roof, back door lock system, driver and
front passenger door lock system,
gauges and meters, multiinformation
display, SRS airbag system, front seat
belt pretensioners
32. WSH 25 A: Wipers and washer
33. AC INV 15 A: Power outlets 34. IGN 2 20 A:
Starting system
35. PWR NO.3 20 A: Rear passenger ’s
power window (right side)
36. PWR NO.4 20 A: Rear passenger ’s
power window (left side)
37. CIG 15 A: Air conditioning systems,
power rear view mirror control, ciga-
rette lighter
38. RAD NO.2 7.5 A: Car audio/video sys-
tem, power antenna, power outlets,
multiplex communication system (power
door lock system, security system,
autodoor locking system, automatic
light control system, headlight delay off
system, tail light auto cut system, illu-
minated entry system, daytime running
light system)
39. 4WD 20 A: A.D.D. control system,
fourwheel drive system
40. STOP 15 A: Stop lights, highmounted
stop lights, multiport fuel injection sys-
tem/sequential multiport fuel injection
system, vehicle skid control system,
traction control system (twowheel
drive models), active traction control
system (fourw heel drive models), mul-
tiplex communication system (autodoor
locking system)

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41. OBD 7.5 A: Onboard diagnosis sys-
tem
42. PANEL 7.5 A: Instrument panel lights,
glove box light, lights of seat heaters,
cigarette lighter, ashtrays, multiinfor-
mation display, car audio/video system,
gauge and meters, air conditioning sys-
tems
43. PWR NO.1 25 A: Driver ’s door lock
system
44. WIP 25 A: Wiper and washers
45. IGN 1 10 A: Charging system
46. SUN ROOF 25 A: Electric moon roof
47. PWR NO.2 25 A: Front passengers’
door lock system
48. HTR 10 A: Air conditioning systems,
electric cooling fan, back window de-
fogger, outside rear view mirror heater
49. FOG 15 A: Front fog lights
50. GAUGE 15 A: Backup lights, seat
heaters, gauge and meters, air condi-
tioning systems
51. PWR OUTLET 15 A: Power outlets
52. SEAT HTR 15 A: Seat heaters Fuses (type B)
53. RR HEATER 30 A: Rear air condition-
ing system
54. HEATER 40 A: Front air conditioning
system
55. DEFOG 40 A: Back window defogger
56. MAIN 40 A: Starting system, “HLP
RH”, “HLP LH” and “STA” fuses
57. DOOR NO.2 30 A: Multiplex commu-
nication system (power door lock sys-
tem, security system, autodoor locking
system)
58. PWR SEAT 30 A: Power front seats
59. AM1 40 A: “HTR”, “CIG”, “GAUGE”,
“RAD NO.2”, “ECUIG”, “WIPER”,
“WSH” and “4WD” fuses
60. PWR NO.5 30 A: Power door lock sys-
tem, back door lock system Fuses (type C)
61. ALT 140 A: “AM1”, “PWR SEAT”,
“TAIL”, “STOP”, “SUN ROOF”, “PANEL”,
“OBD”, “FOG”, “PWR NO.1”, “PWR
NO.2”, “PWR NO.5”, “PWR NO.3”,
“PWR NO.4”, “PWR OUTLET” and
“SEAT HTR” fuses
62. ABS 60 A: Antilock brake system,
vehicle skid control system, traction
control system (twowheel drive mod-
els), active traction control system
(fourwheel drive models)

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Treadwear—The treadwear grade is a
comparative rating based on the wear rate
of the tire when tested under controlled
conditions on a specified government test
course. For example, a tire graded 150
would wear one and a half (11/2) times
as well on the government course as a
tire graded 100. The relative performance
of tires depends upon the actual condi-
tions of their use, however, and may de-
part significantly from the norm due to
variations in driving habits, service prac-
tices and differences in road characteris-
tics and climate.
Traction AA, A, B, C— The traction
grades, from highest to lowest, are AA, A,
B, and C, and they represent the tire’s
ability to stop on wet pavement as mea-
sured under controlled conditions on spe-
cified government test surfaces of asphalt
and concrete. A tire marked C may have
poor traction performance.
Warning: The traction grade assigned to
this tire is based on braking (straight
ahead) traction tests and does not include
cornering (turning) traction. Temperature A, B, C—
The temperature
grades are A (the highest), B, and C,
representing the tire’s resistance to the
generation of heat and its ability to dissi-
pate heat when tested under controlled
conditions on a specified indoor laboratory
test wheel. Sustained high temperature
can cause the material of the tire to de-
generate and reduce tire life, and exces-
sive temperature can lead to sudden tire
failure. The grade C corresponds to a lev-
el of performance which all passenger car
tires must meet under the Federal Motor
Vehicle Safety Standard No.109. Grades B
and A represent higher levels of perfor-
mance on the laboratory test wheel than
the minimum required by law.
Warning: The temperature grades for this
tire are established for a tire that is prop-
erly inflated and not overloaded. Exces-
sive speed, underinflation, or excessive
loading, either separately or in combina-
tion, can cause heat buildup and possible
tire failure.