2006 MITSUBISHI COLT brake sensor

CONSTRUCTION DESCRIPTION
ANTI-SKID BRAKE SYSTEM (ABS)35B-11
SERVICE DATA OUTPUT
The following items of the ECU input data can be
read using M.U.T.-III.
Item No.Check itemCheck conditionNormal condition
01FR wheel speed sensorPerform a test run of the vehicle.Speedometer display and
M.U.T.-III display almost agree
with each other.
02FL wheel speed sensor
03RR wheel speed sensor
04RL wheel speed sensor
05Power supply voltageAlways10 V or more
06Stop lamp switchThe brake pedal is depressedON
The brake pedal is released.OFF
07Va l v e r e l a yWhen ABS is operatingON
When ABS is not operatingOFF
10FL inlet valve When ABS is operatingON
When ABS is not operatingOFF
11FL outlet valve When ABS is operatingON
When ABS is not operatingOFF
12FR inlet valve When ABS is operatingON
When ABS is not operatingOFF
13FR outlet valve When ABS is operatingON
When ABS is not operatingOFF
14RL inlet valve When ABS is operatingON
When ABS is not operatingOFF
15RL outlet valve When ABS is operatingON
When ABS is not operatingOFF
16RR inlet valve When ABS is operatingON
When ABS is not operatingOFF
17RR outlet valve When ABS is operatingON
When ABS is not operatingOFF
20Pump motorWhen ABS is operatingON
When ABS is not operatingOFF

GENERAL INFORMATION
MULTIPOINT FUEL INJECTION (MPI) <4A9>13A-7
Throttle position sensor This sensor detects the position of the throttle valve
and inputs it into the engine-ECU or
engine-CVT-ECU . Based on the voltage that
is output by this sensor, the engine-ECU or
engine-CVT-ECU effects throttle valve
feedback control.
Accelerator pedal position sensor This sensor detects the position of the accelerator
and inputs it into the engine-ECU or
engine-CVT-ECU . Based on the voltage that
is output by this sensor, which determines the
accelerator position (and the intention of the driver),
the engine-ECU or engine-CVT-ECU
effects appropriate fuel injection and throttle valve
position controls.
Camshaft position sensorThis sensor detects the top-dead-center (TDC) of the
compression stroke of each cylinder.
Crank angle sensorThis sensor detects the crank angle and inputs it into
the engine-ECU or engine-CVT-ECU .
The engine-ECU or engine-CVT-ECU
effects injector control and other controls in
accordance with the signals received from this
sensor.
Detonation sensorThis sensor, which contains a piezoelectric element,
detects the vibration of the cylinder block that results
from knocking. The engine-ECU or
engine-CVT-ECU detects only the knocking
of the engine from these vibrations, in order to retard
the ignition timing in accordance with the strength of
the knocks.
Alternator FR terminalThis terminal is used for detecting the duty cycle ratio
that energizes the alternator field coil.
Inhibitor switch This is a contact point type switch that inputs a signal
into the engine-CVT-ECU to determine whether the
shift lever is in the neutral position.
Stop lamp switchThis is a contact point type switch that detects how
the brake pedal is depressed.
Actuators
Engine control relayThis relay turns ON and OFF the engine-ECU
or engine-CVT-ECU power circuit.
Throttle valve control servo relayThis relay turns ON and OFF the actuation power
circuit for the throttle valve control servo in the
engine-ECU or engine-CVT-ECU .
InjectorThe injectors inject fuel in accordance with the
injection signals received from the engine-ECU
or engine-CVT-ECU .
Ignition coil (with power transistor)Applies ignition coil primary current intermittently in
accordance with the ignition signals received from
the engine-ECU or engine-CVT-ECU ,
in order to generate high voltage for ignition.
Name Function

GENERAL INFORMATION
MULTIPOINT FUEL INJECTION (MPI) <4G1>13B-6
Camshaft position sensorThis sensor detects the top-dead-center (TDC) of the
compression stroke of each cylinder.
Crank angle sensorThis sensor detects the crank angle and inputs it into
the engine-ECU. The engine-ECU effects injector
control and other controls in accordance with the
signals received from this sensor.
Detonation sensorThis sensor, which contains a piezoelectric element,
detects the vibration of the cylinder block that results
from knocking. The engine-ECU detects only the
knocking of the engine from these vibrations, in order
to retard the ignition timing in accordance with the
strength of the knocks.
Alternator FR terminalThis terminal is used for detecting the duty cycle ratio
that energizes the alternator field coil.
Stop lamp switchThis is a contact point type switch that detects how
the brake pedal is depressed.
Actuators
Engine control relayThis relay turns ON and OFF the engine-ECU power
circuit.
Throttle valve control servo relayThis relay turns ON and OFF the actuation power
circuit for the throttle valve control servo in the
engine-ECU.
InjectorThe injectors inject fuel in accordance with the
injection signals received from the engine-ECU.
Ignition coil (with power transistor)Applies ignition coil primary current intermittently in
accordance with the ignition signals received from
the engine-ECU, in order to generate high voltage for
ignition.
Fuel pump relayControls the power supplied to the fuel pump in
accordance with the signals received from the
engine-ECU.
A/C compressor relayControls the operation of the A/C compressor in
accordance with the signals received from the
engine-ECU.
Purge control solenoid valveControls the flow rate of the purge air introduced into
the inlet manifold in accordance with the signals
received from the engine-ECU.
Alternator G terminalControls the amount of current generated by the
alternator in accordance with the signals received
from the engine-ECU.
Cooling fan control relayControls the speed of the cooling fan in accordance
with the signals received from the engine-ECU.
Throttle valve control servoControls the throttle valve position in accordance with
the signals received from the engine-ECU.
ECU
Name Function

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