sensor MITSUBISHI COLT 2006 Service Workshop Manual

OPERATION
CONTROLLER AREA NETWORK (CAN)54C-4
OPERATION
M2542000300313
AC206267
ECU-1A
AAA
BBB CCA
B
Interval "a"
Interval "b" Interval "c"
CCC BB
AAA
ECU-1
ECU-2
CAN bus
Data frames
AC206267
AD
Transmission
suspended by
mediation
Re-
transmission
The CAN commun ica t ion system is describe d below .
•Each ECU communicating with CAN pe riodically
se
nds several sensors’ inf o rmation on CAN bu s
as dat
a frame (calle d periodical send ing d a t a ).
For furt
her det ails, co nsult the dat a frame sectio n
.
•ECUs requirin g dat a on CAN bu s can receive
dat
a fra m es sen t from each ECU simult aneo usly .
•The dat a se nt from each ECU condu cting CAN
co
mmunicatio n is transmitted at 10-100 0 msec
in
terva l dep endin g on n e cessity of dat a.
NOTE: In the f i gure ab ove, th e dat a frame A is trans-
mitted in "a" intervals, while the d a t a frames B
and
C are tran smitted at int e rvals "b" and "c,"
respective
ly .
•A single ECU tra n smit s multiple dat a frames.
•When dat a frames conf lict with o ne ano ther
(when
plural ECUs tr ansmit signals simu lt ane
-
ously), data is prioriti sed for transmission b y
mediat
ion, t herefore , plu r al da t a frames are not
se
nt simult aneously . F o r furthe r det ails, consult
the
mediatio n se ctio n
.
•Data is transmitted no t by the conve n tion al volt-
age-using method b u t by volt a ge pot entia l dif f er-
ence. For further det ails, consu l t the section on
CAN
bus volt ag e transformation
.
•Reliability of each ECU transmitting sig nals via
CAN
commun ica t ion is secu red by several error
det
ection and reco very processes. For furth e r
det
ails, consult the sections on error detection
and
sy stem rec o very
.
MEDIA T I O N
Because ea ch ECU transmit s dat a indepe ndently o n
the CAN bus,
there a r e ca ses of da t a collision whe n
multiple dat
a frames that ECUs at temp t to tran smit
simult
ane ously (if mu ltiple ECUs tran smit at n early
the same
moment). At th is moment, p r ocessing of
the ECUs atte
mpting tra n smission is performed in
the followin
g way .
1.Dat a frame with high priority is tra n smitted first
accord ing to ID cod e s memo rize d in dat a frames.
2.T r ansmission of lo w-p r iori ty dat a (dat a frames) is
suspe nded b y the issuin g ECUs until the bus
clears (when no transmission da t a exist s on the
CAN bus).
NO TE: If th e su spen ded st a t e co ntinu e s fo r a sp e-
cific time, new d a t a (dat a frame content ) is cre-
ated and sent.
3.ECU cont aining suspende d dat a fra m es trans-
mits the dat a when t he bus become s available .
NOTE: The re is enou gh ca p a city on t he CAN bus,
wh
ich
neve r prevent s da t a f r ames from being se nt.

SUNROOF
BODY42-21
SUNROOF MOTOR ASSEMBLY
AC207234AB
Sunroof-ECU
Drive gear
Motor
The sunroof motor assembly , which consist s o f the
m
o t o r bo d y , driv e ge ar , a n d sun r oo f-ECU, i s ins t al le d
in fron
t of the housing .
SUNROOF-ECU
6
3
1
10
54
M
AC312986 AC206479
5
4
3
2
1
10
9
8
7
6
AB
Ignition switch
Open switch Tilt-up switch
Close/Tilt-down
switch Sunroof switch Sunroof-ECU
Sunroof motor assembly Motor
Sensor 1
Sensor 2 Sensor
power supply
The su nroof-ECU incorporate s a micro c omputer an d
contro
ls various motor operations base d on t he su n
-
roof switch sign als.

TECHNICAL FEATURES
GENERAL00-18
STEERING
M2000040000140
AC403622

Steering wheel
Steering wheel
Steering column assembly
Torque sensor
Tie-rod end
Yoke-bearing
Crossmember
Steering gear and linkage
Electric power
steering-ECU
Motor
AE
Motor
Electric power
steering-ECU
Steering gear and linkage
Crossmember
Tie-rod end
Torque sensor
Transmission
control cable
Steering column assembly
Selector lever assembly
Dash panel cover
Dash panel cover
Pinion -driven electric p owe r ste ering system (ESP*)
with further improvement s has been adopted. EPS*
has been improved and EPS-ECU has been addi
-
tionally equipped with the return contro l logic, resu lt-
ing in superior stee ring whe el ret urn co ntrol and
better steering fee l equ al to or bett er than that for
other vehicles with hydraulic power steering.
NO TE: *EPS: Electronic Control Power S teerin g
For the mode ls with turb o-charge r, t he qu ick ste ering
gear rat io an d turbo -tuned a ssist chara cteristics
increase sporty tast e.

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.

TECHNICAL FEATURES
GENERAL00-20
ELECTRONIC BRAKE FORCE DISTRIBU-
TION SYSTEM (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.

TECHNICAL FEATURES
GENERAL00-21
SYSTEM CONFIGURATION DIAGRAM
AC314168
Stop lamp switch
Front-right wheel speed sensor Rear-right wheel speed sensor
Rear-left wheel speed sensor Front-left wheel speed sensor
ABS-ECU power supply Engine-CVT-ECU
Front-right solenoid valve (out)
Front-right solenoid valve (in)
Front-left solenoid valve (out)
Front-left solenoid valve (in)
Rear-right solenoid valve (out)
Rear-right solenoid valve (in)
Rear-left solenoid valve (out)
Rear-left solenoid valve (in)
ABS-ECU
Hydraulic
unit Rear-right
wheel speed
sensor
Front right
wheel speed
sensor
Front-left
wheel speed
sensor Rear-left
wheel speed
sensor
Front-right wheel (FR)
Front-left wheel (FL) Rear-right wheel (RR)
Rear-left wheel (RL)
Stop lamp switch
AB
Brake warning lamp
ABS warning lamp
Diagnosis connector
The syst em has the following features:
•Because the system p rovides t he optimum rea r
wheel braking force regardless of vehicle load
co ndition a nd the condition of the road surface,
the system reduces the required pedal depre s
-
sion fo rce, particularly wh en th e veh icle is h eavily
lo aded o r driven on road surfaces with high fric
-
tional coef ficients.
•Because the duty place d on th e front brakes is
redu ced, th e increase in p ad tempe rature can be
controlled d uring brake s ap plication to impro ve
the we ar resist ance characteristics of the pad.
•Contro l valves such as the propo rtioning valve
are not required.

TECHNICAL FEATURES
GENERAL00-22
ACTIVE STABILITY CONTROL SYSYEM
(ASC)
The active stability control system (ASC) has been
installed to the M/T vehicle.
AC601760AB
ABS warning lamp
Diagnosis connector Stoplamp switch
Steering wheel sensor
Wheel speed sensor Wheel speed sensor
G and yaw rate sensorParking brake switch
ASC OFF switch ASC indicator lamp
ASC OFF indicator lamp
Brake warning lamp
Combination meter
Brake fluid level sensor ABS/ASC-ECU
Engine-ECU
Magnetic encoder for
wheel speed detection Magnetic encoder for
wheel speed detection
•The
active st ability control syst em (ASC) has the
st ab ility control and t he traction control (TCL)
fun ctio ns. By the integra ted control with th e
ant i-lock b rake system, the system stabilizes th e
ve hicle attitu de and at the same time secures the
drivin g force.
•When the st ability control fun ction dete rmin es
tha t the vehicle is in a dangerou s condition, it
redu ces the e ngine outpu t and a pplies b rake
force to f our wheels indepe ndently to control th e
ve hicle be haviour, avoiding the critical state.
•The tract ion control (TCL) fun ction prevent s the
drivin g wheel slip on a slippery road sur face,
ensurin g easy st artup, an d at the same time,
secure s proper drivin g force and improves ste er
-
in g perfo rmance du ring cornering acce leration.
•Fail-safe functio n assures the security.
•Serviceability imp rovement
•For wiring h arness saving an d secure data com-
municatio n, the CAN* co mmunicatio n has been
ado pted a s a t ool o f commun ication with ano ther
ECU.
NO TE: .
•*For more informatio n about CAN (Con troller
Area Net wor k), refe r to GROUP 54C
P.54C-2.
•ABS and ASC are controlled by ASC-ECU.

TECHNICAL FEATURES
GENERAL00-23
SYSTEM CONFIGURATION DIAGRAM
AC600637AC
Combination meter
ABS warning lamp 
· Brake warning lamp
· Active stability control indicator lamp
· Active stability control OFF indicator lamp
Diagnosis
Connector
Control solenoid valve (FR) OUT
Control solenoid valve (FR) IN
Control solenoid valve (FL) OUT
Control solenoid valve (FL) IN
Control solenoid valve (RR) OUT
Control solenoid valve (RR) IN
Control solenoid valve (RL) OUT
Control solenoid valve (RL) IN Suction valve (FR)
Suction valve (FL)
Cut valve (FR)
Cut valve (FL) Pump motor
Active stability
control system-ECU
Front-left wheel speed sensor
Rear-left wheel speed sensor
Front-right wheel speed sensor Rear-right wheel speed sensor
Master cylinder pressure sensor Stop lamp switch
Parking brake switch
Brake fluid level switch
Power supply to active stability
control system-ECU Steering wheel sensor
G and yaw rate sensor
Engine-ECU
Steering wheel sensor
Front-right wheel (FR)
Wheel
speed
sensor
Engine-ECU
G and yaw rate sensor
Parking
brake
switch Rear-right wheel (RR)
Wheel
speed
sensor
Stop lamp switch
Hydraulic
unit Wheel speed
sensor Rear-left
wheel (RL)
Wheel speed
sensor
Front-left wheel (FL)
Note
: CAN-bus line

TECHNICAL FEATURES
GENERAL00-26
SCHEMATIC DIAGRAM
AC508098
Front impact against
another vehicleor
Front impact against a
solid surface Analogue G-sensor
Ignition judgment
Shock
above a
certain
level
Ignition signal
SRS-ECU
Front air bag safing
G-sensor
Front impact
sensor (RH)
Front impact
sensor (LH)
AB
In case of a
frontal collision, if the front imp act sensor
in the engine comp artment, the analogue G-sensor
in the SRS-ECU and t he front air bag safing sensor
simult aneously de tect an imp act th at excee d a cer
-
ta in threshold (turn ON), the SRS-ECU sen ds an
ignition signal to the air bag modules (squ ibs) and
seat belt with pre-te nsioners (squibs) on the driver
and p asseng er sides, thus inflating the air bag s and
operating the seat belt with pre -tensioner s.
SEAT BEL T RETRACT OR WITH FORCE
LIMITE R
The driver ’s /front p asseng er’s seat belt retractor has
been e quipped with a force limit er. The force limiter
is a device which operat es when a predetermined
force is applied, an d limits the for ce.
OPERA TION
1. If collision energy is transmit ted to the seat belt,
th e ELR mechanism will oper ate to lock the seat
be lt.
AC100083
Torsion bar
Spindle
Belt
AC
2.
Then, if the en ergy increase s to a prede termined
value , the to rsion bar will b e distorted . As th e
spind le rot ate s tog ether with the t orsion bar , the seat b
elt webb ing is p ulle d out, reducing th e
imp act against t he occupants.
REAR SEA T BELT WITH CHILD SEA T FIX-
ING MECHANISM (ALR*)
The child seat fixing mechanism h as b een ad opted
to easily and securely fix the child seat that is not
comp atible with ISO FIX.
NO TE: *ALR: Automatic Lockin g Retractor
STEERING SHAFT AND STEERING COL-
UMN
The impact ab sorption mech anism in combin ation of
retract able steerin g shaft and steering co lumn disen
-
gagement mecha nism has been ad opted t o alle viate
the imp act from th e steering wheel to the d rive r.
BRAKE PEDAL AND PA RKING BRAKE
PEDAL
The bra ke pe dal b ackward mo vement restraint
mechanism to restrain the backward movement of
the brake p edal to the minimum at the time o f f ront al
collision h as b een ad opted so that the impact to th e
lower limb s of the driver can be alleviated.
CHILD SEAT FIXING BAR COMP ATIBLE
WITH ISO FIX*
The an chor bar has been equipped a s st andard fo r
easily and secu rely fixing the child seat comp atible
with ISO FIX.
NO TE: *ISO F IX: ISO (In ternational Orga nization for
S tand ardizatio n) complied child se at fixing method

TECHNICAL FEATURES
GENERAL00-29
IMPROVED SERVICEABILITY
•Employment of an automatic hydraulic timing belt
tensioner offers timing belt reliability, reduced
operating noise, and better serviceability. <4G1>
•Wiring harness section of the crank angle sensor
has been moulded integrally with the timing belt
cover, improving serviceability and reliability.
<4G1>
•Due to the adoption of the timing chain and the
timing chain tensioner, maintenance-free and reli
-
ability have been improved. <4A9>
•Since adoption of unvolatile memory (EEPROM*)
helps the learned value not to be initialised when
the battery terminal or connector of the control
unit is disconnected, maintainability can be
improved.
NOTE: *EEPROM: Electrical Erasable Programma-
ble ROM (information to be memorised can be
electronically written into and erased from ROM)
•Since the adoption of electric power steering
makes hydraulic pipes and oil pumps unneces
-
sary, maintainability can be improved.
•Employment of operative A/C piping layout and
refrigerant leak detection system enhances serv
-
iceability.