2015 TOYOTA TACOMA traction control

191
2-4. Using other driving systems
2
When driving
Driving assist systems
To help enhance driving safety and performance, the following sys-
tems operate automatically in res ponse to various driving situations.
Be aware, however, that these systems are supplementary and
should not be relied upon too heavi ly when operating the vehicle.
■ABS (Anti-lock Brake System)
Helps to prevent wheel lock when the brakes are applied suddenly, 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 pedal is
depressed, while the system detects 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 (vehicl es with towing hitch and 7 pin
connector)
Helps the driver to control trailer sway by selectively applying brake
pressure for individual wheels and reducing engine torque when trailer
sway is detected.
Trailer Sway Control is part of the VSC system and will not operate if
VSC is turned off or experiences a malfunction.
■ TRAC (Traction Control)
Helps to maintains drive power and prevent the drive wheels from spin-
ning when starting the vehicle or accelerating on slippery roads.
■Hill-start assist control (if equipped)
Helps prevent the vehicle from rolling backwards when starting on an
incline or slippery slope. It operates for approximately 5 seconds at
maximum.

451
4-3. Do-it-yourself maintenance
4
Maintenance and care
■
Under the instrument panel
FuseAmpereCircuit
1 IGN 15 A Multiport fuel injection system/
sequential multiport fuel injection
system, anti-lock brake system,
traction control system, vehicle sta-
bility control system, SRS airbag
system, front passenger occupant
classification system
2 GAUGE 7.5 A Meter and gauge, emergency
flashers
3 TAIL 10 A Tail lights, license plate lights, park-
ing lights, multiport fuel injection
system/sequential multiport fuel
injection system, instrument panel
light control, illuminations
4 ACC 7.5 A Shift lock system, outside rear view
mirrors, audio system, power out-
lets
5 PWR OUTLET 15 A Power outlets
6 DR LCK 20 A Door lock system

452 4-3. Do-it-yourself maintenance
7 IG1 NO.210 AAnti-lock brake system, vehicle sta-
bility control system, stop lights,
charging system, multiport fuel
injection system/sequential multi-
port fuel injection system, air condi-
tioning system, instrument panel
light control, anti-glare inside rear
view mirror, back monitor, clutch
start cancel switch, rear differential
lock system, power outlets, tire
pressure warning system
8 BKUP LP 10 A Trailer lights (back-up lights)
9 IG1 10 AAnti-lock brake system, traction
control system, vehicle stability
control system, back-up lights, air
conditioning system, shift lock sys-
tem, audio system
10 P RR P/W 20 ARear passenger’s power window
(right side)
11 P FR P/W 20 A Front passenger’s power window
12 WSH 10 A Wipers and washer
13 D RR P/W 20 ARear passenger’s power window
(left side)
14 4WD 20 AFour-wheel drive system, rear dif-
ferential lock system
15 WIP 30 A Wipers and washer
16 D FR P/W 30 A Power windows
FuseAmpereCircuit

478 5-2. Steps to take in an emergency
(U.S.A.)
(Canada) ABS warning light
Indicates a malfunction in:
• The ABS; or
• The brake assist system.
Slip indicator The indicator comes on to indicate a malfunction in:
• The VSC;
• The TRAC;
• The active traction control system (if equipped);
• The AUTO LSD system;
• The downhill assist control system (if equipped);
• The hill-start assist control system (if equipped); or
• The Trailer Sway Control (if equipped).
(Flashes) Cruise control indicator light (if equipped)
Indicates a malfunction in the cruise control system.
Warning lightWarning light/Details

5
When trouble arises
499
5-2. Steps to take in an emergency
CAUTION
■Speed limit when using the temporary spare tire
Do not drive at speeds in excess of 50 mph (80 km/h) when a temporary
spare tire is installed on the vehicle.
The temporary spare tire is not designed for driving at high speeds. Fail-
ing to observe this precaution may lead to an accident causing death or
serious injury.
■Driving with tire chains and the temporary spare tire
Do not fit tire chains to the temporary spare tire.
Tire chains may damage the vehicle body and adversely affect driving
performance.
■When the spare tire is attached
The vehicle speed may not be correctly detected, and the following sys-
tems may not operate correctly:
●ABS & Brake assist
●VSC
●TRAC
●Active traction control system (if equipped)
●Hill-start assist control system (if equipped)
●Downhill assist control system (if equipped)
●AUTO LSD system
●Cruise control (if equipped)
Also, not only can the following syste m not be utilized fully, it may actu-
ally negatively effect t he drive-train components:
●4WD system

544 6-1. Specifications
■Treadwear
The treadwear grade is a comparative rating based on the wear
rate of the tire when tested und er controlled conditions on a
specified government test course.
For example, a tire graded 150 would wear one and a half (1 - 1/2)
times as well on the government course as a tire graded 100.
The relative performance of tires depends upon the actual conditions
of their use, however, and may depart significantly from the norm due
to variations in driving habits, service practices and differences in
road characteristics 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 ab ility to stop on wet pavement as
measured under controlled cond itions on specified 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 dissipate heat when te sted under controlled conditions on
a specified indoor laboratory test wheel.
Sustained high temperature can cause the material of the tire to
degenerate and reduce tire life, and excessive temperature can lead
to sudden tire failure.
The grade C corresponds to a level 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 performance on the
laboratory test wheel than the minimum required by law.

574
Abbreviation list
Abbreviation/Acronym list
ABBREVIATIONSMEANING
2WDTwo Wheel Drive
4WD Four Wheel Drive ABS Anti-Lock Brake System
ACC Accessory ALR Automatic Locking Retractor
A-TRAC Active Traction Control
AUTO LSD Automatic Limited Slip Differential CRS Child Restraint System
DAC Downhill assist control
ECU Electronic Control Unit
EDR Event Data RecorderELR Emergency Locking Retractor
GAWR Gross Axle Weight Rating
GCWR Gross Combination Weight Rating GVWR Gross Vehicle Weight Rating I/M Emission inspection and maintenance
LATCH Lower Anchors and Tethers for Children LED Light Emitting DiodeLT Light truck
M + S Mud + Snow MMT Methylcy clopentadienyl Manganese Tricarbonyl
MTBE Methyl Tertiary Butyl Ether
OBD On Board Diagnostics
RR DIFF LOCK Rear differential lock RSCA Roll sensing of curtain shield airbag
SRS Supplemental Restraint SystemTIN Tire Identification Number

575
Abbreviation list
TPMS Tire Pressure Warning System
TRAC Traction Control TWI Treadwear indicators
TWR Trailer Weight Rating VIN Vehicle Identification Number
VSC Vehicle Stability Control
ABBREVIATIONSMEANING