2006 MITSUBISHI COLT brake

STRUCTURAL DESCRIPTION
PARKING BRAKES36-4
STRUCTURAL DESCRIPTION
M2360000200192
AC207357AB
PawlSector
Release lever
Pawl return spring
Return spring
The pa rking b r ake pedal assemb ly consist s of the
p
a r k ing brake peda l, secto r , rele ase leve r , p a wl
return sprin
g , p a wl, an d return spring. Th e sector is
secured to
the p a rking b r ake pedal bracket b ody .
The p
a wl a nd release lever are f i xe d to the pin axle
by th
e sectio n with a n oblong ho le. Th e p a wl and
release lever
are co nnected by the p a wl returning
spring, an
d move tog e ther with the pedal.

OPERATIONAL DESCRIPTION
PARKING BRAKES36-5
OPERATIONAL DESCRIPTION
M2360000300207
PARKING BRAKE PEDAL OPERATION
OPERATION WHEN PEDAL IS
DEPRESSED
AC405464
Pawl axle
AB
Sector
Release lever
Pawl Pawl return springSpring force
When th
e p a rking bra k e is released, the p a wl
receives the lef
t -rot a tion force (the d i rection o f
engage
ment ) around the p a wl axis from the p a wl
return sprin
g . Then , depre ssing th e peda l eng ages
the p
a wl an d se ctor , relea s ing a clickin g so und.
OPERAT ION AFTER PEDAL IS
DEPRESSED
AC405465
Contact point
of release lever
and pawl
Release lever
rotates
AB
De pressing the pe dal a nd removing on e's fo ot
causes
the p a wl axis to slid e the sect ion with an
oblon
g hole from the re pulsive force of th e cab l e.
Then, t
he release lever af fixe d to th e p a wl axis is
push
ed by the p a wl and rot a te s, the p a wl return
spring position
is inverted, an d r i ght-ro t a t i on force (in
the release dire
ctio n) is appl ied to the p a wl. At this
time
, the e ngage ment force of the p a wl and sect or
preve
n t s release .
OPERAT ION W H EN PEDAL IS
DEPRESSED
AC405466AB
Disengaged
Depressing the pe dal a gain for release disengag es
it, rot
a ting the p a wl from the sprin g force and releas
-
ing the lock.

OPERATIONAL DESCRIPTION
PARKING BRAKES36-6
OPERATION WHEN PEDAL IS
RETURNED
AC405467
Lever
returning
part
AB
When returnin g the p edal, the release lever ret u rns
to the st
arting position from the lever returning se c
-
tion as the spring po sition is inverte d , ca using the
p
a wl to retu rn to th e positio n of release for th e p a rk
-
ing br eak.

GENERAL
ACTIVE STABILITY CONTROL SYSTEM (ASC)35C-2
GENERAL
M2357000200040
The active stability control system (ASC) has been
installed to the M/T vehicle.
•The active stability control system (ASC) has the
stability control and the traction control (TCL)
functions. By the integrated control with the
anti-lock brake system, the system stabilises the
vehicle attitude and at the same time secures the
driving force.
•When the stability control function determines
that the vehicle is in a dangerous condition, it
reduces the engine output and applies brake
force to four wheels independently to control the
vehicle behaviour, avoiding the critical state.
•The traction control (TCL) function prevents the
driving wheel slip on a slippery road surface,
ensuring easy startup, and at the same time,
secures proper driving force and improves steer
-
ing performance during cornering acceleration.
•Fail-safe function assures the security.
•Serviceability improvement
•For wiring harness saving and secure data com-
munication, the CAN* communication has been
adopted as a tool of communication with another
ECU.
NOTE: .
•*For more information about CAN (Controller
Area Network), refer to GROUP 54C
P.54C-2.
•ABS and ASC are controlled by ASC-ECU.
CONSTRUCTION DIAGRAM
AC600849AB
1 12
2
3
46
5
7
8
9, 10, 17
14
12
11
13
15
16

ComponentNo.Function
SensorWheel speed sensor1Sends alternating current signals at frequencies which are
proportional to the rotation speeds of each wheel to the
active stability control system-ECU
Magnetic encoder for wheel
speed detection2The wheel speed sensor is a pulse generator. When the
magnetic encoder for wheel speed detection (a plate on
which north and south pole sides of the magnets are
arranged alternately) rotates, it outputs frequency pulse
signal in proportion to each wheel speed.
Stop lamp switch3Sends a signal to the active stability control system-ECU
to indicate whether the brake pedal is depressed or not.
Parking brake switch4Outputs the signal indicating whether the parking brake
lever is pulled or not to ASC-ECU.
Brake fluid level switch5Outputs the signal indicating whether the brake fluid is
filled to the lowest limit level or not to ASC-ECU.
G and yaw rate sensor6Detects the lateral acceleration and the yaw rate for the
vehicle. Then it sends a signal through the CAN bus line to
the active stability control system-ECU.
Steering wheel sensor7Detects the steering wheel angle, and sends a signal to
the active stability control system-ECU through the CAN
bus line.
ASC OFF switch8Outputs the ASC ON/OFF signal to ASC-ECU.
Pressure sensor9Is incorporated in the hydraulic unit, and informs the active
stability control system-ECU of the brake fluid pressure in
the master cylinder.
ActuatorHydraulic unit10Drives the solenoid valves and pump motor according to
signals from the ABS/active stability control system-ECU in
order to control the brake hydraulic pressure for each wheel.
ABS warning lamp11Illuminates in response to signals from the active stability
control system-ECU when a problem develops in the
system.
Brake warning lamp12Illuminates in response to signals from the active stability
control system-ECU when a problem develops in the EBD
system or the brake fluid level is low.
Active stability control system
(ASC) indicator lamp 13Receives a signal from the active stability control
system-ECU, and flashes to inform the driver that the
system is operating, or illuminates to inform the driver of
system shutdown.
ASC OFF indicator lamp14Informs the driver of the ASC shutdown by illuminating
with the signal from ASC-ECU.
Diagnosis connector15Sets the diagnosis codes and allows communication with
the M.U.T.-III.
Engine-ECU16Receives a signal from the active stability control
system-ECU to control the engine output.
Anti-skid Brake/Active Stability Control
System control unit (ABS/active stability
control system-ECU)17Controls actuators (described above) based on the signals
coming from each sensor.
Controls the self-diagnostics and fail-safe functions.
Controls the diagnostic function (M.U.T.-III compatible).
GENERAL
ACTIVE STABILITY CONTROL SYSTEM (ASC)35C-3

GENERAL
ACTIVE STABILITY CONTROL SYSTEM (ASC)35C-4
SCHEMATIC 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

CONSTRUCTION DIAGRAM
ACTIVE STABILITY CONTROL SYSTEM (ASC)35C-5
CONSTRUCTION DIAGRAM
SENSORM2357000300036
G AND YAW RATE SENSOR
AC600804ACG and yaw rate sensor
Parking brake lever
This sens or , inst alled u nder th e ce ntre conso l e,
detect
s the yaw rate a nd lateral accelera tion of the
vehicle
.
STEERING WHEEL SENSOR
AC600803ACSteering wheel sensor
This sens or , a t t a ched to the column switch, det ect s
the rot
a tional angle of the stee ring whe e l.
ASC OFF SWITCH
AC600923ABASC OFF switch
Th is swit ch is at t a che d on the inst rument p a nel to the
right side
of the driver's seat. The ASC system ca n
be turn
ed OFF by pressing this ASC OFF switch for
3 seconds when t
he ig nition switch is ON. By pre s s
-
ing the switch a gain, the system can be turned ON.
NOTE: .
•Whe n the ASC syste m is turn ed OFF , the ASC
OFF ind
i ca tor illuminat es.
•If the ASC OFF switch is presse d for 15 se cond s
or
more , the ope ratio nal error prevention function
activates, and th
e ASC system can not be turned
OFF until the
ign i tion switch is turn ed to t he ON
position ag
ain.
ASC OFF switch ope ra tion and system operation
ASC OFF switch controlTCL functionStability control function
ON (ASC OFF indicator goes out.)EnabledEnabled
OFF (ASC OFF indicator
illuminates.)ProhibitedProhibited
NOTE: The ASC function st a r t s the co ntrol when t he
vehicle
spe ed is 10 km/h or mo re.

CONSTRUCTION DIAGRAM
ACTIVE STABILITY CONTROL SYSTEM (ASC)35C-8
EXAMPLE OF THE EFFECT OF CONTROL
AC204504
AC204505
AC204506AC204507AB
Restraining under-steering Restraining over-steering
Avoiding under-steering Avoiding wheel spin
Improving ABS performance
Stable vehicle attitude
after avoiding obstacles
Example of TCL control
When th e driving wheel slip s (ex. during drivin g on
low
µ road), TCL send s the engine out put red u ction
sign
al to the en gine ECU in order to prevent th e driv
-
ing f o r c e loss cau s e d by t he dr iving whe e l slip . A t t h e
same time, TCL a
pplies th e brake to t he slipp i ng
driving whe
e l so that the drivin g force is applied to
t
he non-slipping driving wheel, which co ntrols the slip
o
f th e drivi ng wheel, securin g the prop er d r iving f o rce
and increa
sed steering fo rce.
Fail-safe and diagnostic functions
ASC-ECU constantly mo nitors the input and ou tput
sign
als. If an error is det ected in th e syste m ,
ASC-ECU send
s a f a il sign al a nd the correspond ing
indicato
r lamp is illuminate d or blinks. V a riou s con
-
trols are proc essed depen ding on the cause of mal-
functi on a s shown below . ASC-ECU has the
follo
wing fu nctions for easier system checks.
•Diagnosis code set
•Service dat a outp u t
•Actuator te st
All the above it ems can be diagnosed using
M.U.T
. -III.