2006 MITSUBISHI COLT wiring

GENERAL INFORMATION
ANTI-SKID BRAKE SYSTEM (ABS)35B-2
GENERAL INFORMATION
M2351000100409
FEATURES
The ABS ensures directional stability and controlla-
bility during hard braking.
For vehicles with this type of ABS, 4 sensors (4
channels) are installed on front and rear wheels
allowing independent left and right control.
The system has the following features:
•EBD (Electronic Brake-force Distribution system)
control has been added to provide the ideal brak
-
ing force for the rear wheels.
•Magnetic encoder for wheel speed detection has
been installed as a sensing device instead of the
rotor.
•For wiring harness saving and secure data com-
munication, CAN* bus has been adopted as a
tool of communication with another ECU.
NOTE: *: For more information about CAN (Control-
ler Area Network), refer to Group 54C, General Infor-
mation P.54C-2.
EBD CONTROL
In ABS, electronic control is used so the rear wheel
brake hydraulic pressure during braking is regulated
by rear wheel control solenoid valves in accordance
with the vehicle's rate of deceleration, and the front
and rear wheel slippage which are calculated from
the signals received from the various wheel speed
sensors. EBD control provides a high level of control
for both vehicle braking force and vehicle stability.
The system has the following features:
•Because the system provides the optimum rear
wheel braking force regardless of vehicle load
condition and the condition of the road surface,
the system reduces the required pedal depres
-
sion force, particularly when the vehicle is heavily
loaded or driven on road surfaces with high fric
-
tional coefficients.
•Because the duty placed on the front brakes is
reduced, the increase in pad temperature can be
controlled during brakes application to improve
the wear resistance characteristics of the pad.
•Control valves such as the proportioning valve
are not required.
SPECIFICATIONS
ItemSpecification
ABS control method4-sensor, 4-channel
Wheel speed
sensorMagnetic encoderFront86 (N pole:43 S pole:43)
Rear86 (N pole:43 S pole:43)
Ty p eSemiconductor

CONSTRUCTION DESCRIPTION
ANTI-SKID BRAKE SYSTEM (ABS)35B-6
CONSTRUCTION DESCRIPTION
SENSORSM2351001000427
WHEEL SPEED SENSORS AND MAG-
NETIC ENCODER FOR WHEEL SPEED
DETECTION
AC601358
Rear wheel speed sensor
Front wheel speed sensor
Front Rear Rear
Encoder for wheel
speed detection Encoder for wheel
speed detectionRear wheel speed sensor
Encoder for wheel
speed detection
AB
Wheel spee d se nsor is a kin d of a pulse gen erator
consisted of
a mag netic encoder (a pla t e on which
north an
d so uth po le sides of th e mag net are
arrange
d alte rnately) for wh eel speed detection
which rot
a tes at the same speed of the wheels, and a
spee
d sen s or (semicon duct o r se nsor), send s fre
-
quency pulse sig nals in proportion to wh eel spee d.
Front wheel sp eed sensor co nsist s of a front whe e l
spee
d sen s or secu red on the knuckle, and a mag
-
netic encoder for wheel spee d dete c tio n fitt ed to th e
inside o
f the fro n t wheel bearing. Rear wh eel speed
sensor consist
s o f a rear wh eel speed sensor
secured on
the re ar hub, and a magn etic encoder fo r
whe
e l speed detection press fit t ed to the rear hub
inner ring.
ABS-ECU
M23510030 0025 2
•By integrating ABS-ECU into the hydraulic unit ,
no
more wiring h a rnesses for sending signal that
ope
rates the solen o id valve an d pump mo tor is
requ
ired, assuring high er reliability .
•Self-diag nostic p r ograms an d memory functions
are
integrated into ABS-ECU. If any malfunction
is dete
c ted by th e se lf-diagnostic function,
ABS-ECU activates
a fail-s afe function and illumi
-
nates ABS warning lamp and brake warning
la
mp
*.
NO TE: *: ABS-E CU illuminates the brake warning
l
a
m
p as EBD c o nt ro l wa rn in g la m p .
•ABS-ECU detects vehicle speed from the wheel
speed sensor signal, reco
gnizes the whee l rot a
-
tion, estimates the wheel slip condition based on
the
preprog rammed algorithm, a nd the n co ntrols
th
e soleno id valve in the hydr aulic u n it so th at the
wheels d
o not lock.
ABS FLUID PRESSURE CONTROL
FOUR-WHEEL CONTROL
ABS fluid pressure is controlled indep enden tly for
four whee
ls.

CONSTRUCTION DESCRIPTION
ANTI-SKID BRAKE SYSTEM (ABS)35B-7
EBD FLUID PRESSURE CONTROL
AC208548AB
Ideal distribution curve when
seated by fixed personsEBD operating conceptual design
Rear braking force
Ideal distribution curve when seated by one persons Braking force distribution curve
by the existing proportioning valveBraking force distribution
by EBD control
Front braking force
Braking Force
Improved
EBD control is
activate d within the lower slip ratio
area where
ABS is disab l ed. ABS-ECU calculates
vehicle
decelera t ion a nd slip amou nt of th e four
whe
e ls based on the wheel sp eed senso r signal. If
the rear
wh eel speed dif f ers f r om th e ve hicle speed
by a
cert ain level or more, ABS-ECU boost, holds,
and de
pressurises the rea r wh eel contro l so leno id
valve in the h
y drau lic unit, and then a d just s rear
whe
e l b r ake fluid pressure fa ir ly close to an ideal dis
-
tribution curve.
INITIAL CHECK
ABS-ECU inter nally activates the self-d iagno stic
function. ABS-ECU illuminates
ABS warning l a mp for
3 seconds (in
c lu ding the in itia l check)
* after th e ign i-
tion switch is turned ON. If a n y malf unction is
detected, ABS-ECU cont
inues illuminating ABS
war
n ing lamp and disables ABS cont rol.
NOTE: *: ABS warning lamp may st ay ON af ter the
ignition
switch is turned ON un til t he st artu p ve hicle
spee
d reaches approximately 10km/h . As far as
ABS-ECU memorizes any d i agn osis code related t o
the
whee l speed sen s or malfunct i on record ed d u ring
previous ignition ON st atus, ABS-ECU continues illu
-
mina ting ABS warn ing lamp until it verif i es that th e
malfunct
i on for tha t co de is resolved (S t a rtup che ck).
STARTUP CHECK
When th e st artup veh i cle sp eed re ache s app roxi-
mately 10 km/h, ABS-ECU performs the following
checks.
•Motor, solen o id valve check (onl y i n ini t ial st ar-
tup*)
Operat es the motor relay in ECU and checks the
pump motor op eratio n. At the same time,
ABS-ECU sequentially e nergizes each solenoid
valve in a ve ry sh ort perio d and ch ecks the valve
ope ration .
NOTE: *: Initia l st artu p ind i ca tes a first st artup af ter
the
system has st arted .
•Whee l speed sensor check
ABS-ECU che cks for a n y whee ls that ha ve no t
received whee l sp eed sens or signal from the
st artu p.
CONSTANT CHECK
ABS-ECU con s t antly ch ecks th e following item.
•ABS-ECU
Performs se lf-diagnosis in ECU.
•ECU power supply
Checks if ECU po we r sup p ly volt ag e reaches within
the operat ional range .
•Whee l speed sensor
•Monitors the ou tput volt age of the sensor sig-
nal wiring ha rness an d che c ks for a bnormal
output
volt ag e (ope n/sho r t circuit).
•Checks fo r any wheels tha t do n o t send pu lse
sig
nal while th e ve hicle is in motion.
•Checks if wheel spee d which is abno rmally
high
er or lo we r than the vehicle speed is
inpu
t.
•Pump mo tor and solenoid valve
Checks tha t ABS-ECU outp u t signal and t he ope rat-
ing co ndition of the pump motor an d so leno id
valve agree
with ea ch ot her .

GENERAL INFORMATION
HEATER, AIR CONDITIONER AND VENTILATION55-2
GENERAL INFORMATION
M2551000100759
For the heater and A/C system, the heater, the
blower and the cooling unit are integrated as one unit
to reduce weight and size. For A/C system, the man
-
ual A/C has been adopted.
FEATURES
IMPROVEMENTS IN COMFORT
•Adoption of low noise, large air volume heater
and A/C system
•Adoption of smaller air intake box for larger pas-
senger leg space.
•Optimising the areas of the outside air induction
hole and the air outlet improves ventilation per
-
formance as well as the quietness of the room
•Adoption of clean air filter with deodorant function
for cleaner air in the compartment.
IMPROVEMENTS IN OPERATION
PERFORMANCE
•Inside/outside air selection switch has been
changed to a pushbutton switch.
•Improved operation ability by the enlarged tab on
the dial knob
•Air amount and temperature only are controlled
automatically for easier operation. automatic A/C>
RELIABLE VISUAL FIELD
(IMPROVEMENT IN SAFETY)
•Current type defroster nozzle has been adopted
to improve defogging performance (Shortens
windshield fogging time).
•Defroster vents have been integrated to secure
better defogging pattern.
•Black coin drop prevention ribs are used on the
defroster to prevent its reflection on the wind
-
shield, providing sufficient field of vision for safety
IMPROVEMENTS IN FUEL ECONOMY
•Wider condenser area reduces load to the A/C
and improves fuel consumption.
•Energy conservation control using outside air
temperature sensor is adopted for vehicles with
manual A/C as well.
•A small-size, highly-efficient compressor has
been adopted.
•Simpler wiring and weight reduction are achieved
by installation of CAN communication system
GLOBAL ENVIRONMENT PROTECTION
Adoption of HFC134a for refrigerant.
IMPROVEMENTS IN SERVICE QUALITY
•Reduction of refrigerant gas leakage and
improvement in serviceability by incorporating
condenser and receiver
•The layout of refrigerant line for better workability
is adopted.
RESPONSIBILITY IMPROVEMENT
Reliable information transmission is achieved by
connecting A/C-ECU and each ECU via CAN com
-
munication.

GROUP 54
CHASSIS
ELECTRICAL
CONTENTS
CHASSIS ELECTRICAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54A
SMART WIRING SYSTEM (SWS) . . . . . . . . . . . . . . . . . . . . . . .54B
CONTROLLER AREA NETWORK (CAN) . . . . . . . . . . . . . . . . .54C

GENERAL INFORMATION
CONTROLLER AREA NETWORK (CAN)54C-2
GENERAL INFORMATION
M2542000100159
CAN, an abbreviation for Controller Area Network, is
an ISO-certified international standard for a serial
multiplex communication protocol
*1. A communica-
tion circuit employing the CAN protocol connects
each ECU, and sensor data can be shared among,
which enables more reduction in wiring.
NOTE: *1: The regulations have been decided in
detail, from software matters such as the necessary
transmission rate for communication, the system,
data format, and communication timing control
method to hardware matters such as the harness
type and length and the resistance values.
CAN offers the following advantages.
•Transmission rates are much faster than those in
conventional communication (up to 1 Mbps),
allowing much more data to be sent.
•It is exceptionally immune to noise, and the data
obtained from each error detection device is more
reliable.
•Each ECU connected via the CAN communicates
independently, therefore if the ECU enters dam
-
aged mode, communications can be continued in
some cases.

GENERAL INFORMATION
CHASSIS ELECTRICAL54A-2
GENERAL INFORMATION
M2540000100302
FEATURES
IMPROVEMENT OF VISUAL OBSERVA-
TION AND SAFETY, AND ENHANCEMENT
OF USER-FRIENDLINESS AND VERSA
-
TILITY
•The large four headlamps with the lightweight
resin lenses have been adopted.
•The high-mounted stop lamp has been installed
on the tailgate for all models.
•Combination meters and ECUs are connected
using CAN to ensure the transmission of informa
-
tion.
•The combination meters are provided integrated
with a perfect round-shaped speedometer where
the needles operate at the wider angle.
IMPROVEMENTS IN SERVICE QUALITY
•Diagnosis connector for inspection with M.U.T.-III
is installed.
•Diagnosis and service data are integrated in the
combination meter, enabling communication with
M.U.T.-III
BETTER PRODUCT PACKAGE
•The smart wiring system (SWS) has been
adopted for the lamp control including the head
-
lamp auto turn-off and fog lamp unattended-oper-
ation reminder.

TECHNICAL FEATURES
GENERAL00-19
ACTIVE SAFETY
M2000031000528
ANTI-SKID BRAKE SYSTEM (ABS)
The ABS ensures directional stability and controlla-
bility during hard braking.
For vehicles with this type of ABS, 4 sensors are
installed on front and rear wheels allowing independ
-
ent left and right control.
AC601759AB

ABS warning lamp
Brake warning lamp
ABS warning lamp
Brake warning lampBrake warning lamp
ABS warning lamp
Stop lamp switch
Hydraulic unit and ABS-ECUWheel speed sensor Wheel speed sensor
Diagnosis connector
CONSTRUCTION DIAGRAM
The syst
em has the following features:
•EBD (Electronic Bra ke-fo rce Distributio n system)
co ntrol has been added to provide t he ideal brak
-
in g force for th e rear wheels.
•Magnetic en coder for whee l speed de tection ha s
bee n inst alled as a se nsing device instead of the
rotor .
•For wiring h arness saving an d secure data com-
municatio n, CAN* b us h as be en ad opted a s a
too l of communication with another ECU.
NO TE: *: Fo r more information abo ut CAN (Control-
ler Area Netwo rk), re fer to GROUP 54C, Genera l
Information
P.54C-2.