2008 MITSUBISHI LANCER EVOLUTION X Motor

SENSOR
MULTIPORT FUEL SYSTEM (MFI)13A-11
STRUCTURE AND SYSTEM
Throttle position sensor is composed of a permanent magnet
fixed on the throttle shaft, Hall IC that outputs voltage according
to magnetic flux density and a stator that efficiently introduces
magnetic flux from the permanent magnet to Hall IC.
Magnetic flux density at Hall IC is proportional to the output
voltage.
Throttle position sensor has 2 output systems − throttle position
sensor (main) and throttle position sensor (sub), and the output
voltage is output to ECM. When throttle valve turns, output volt
-
age of throttle position sensor (main) and throttle position sen-
sor (sub) changes. This allows ECM to detect actual throttle
opening angle. ECM uses this output voltage for throttle actua
-
tor control motor feedback control. Also, ECM compares output
voltage of the throttle position sensor (main) and throttle posi
-
tion sensor (sub) to check for abnormality in the throttle position
sensor. The relationship between throttle opening angle and
output voltage of the throttle position sensor (main) and throttle
position sensor (sub) is as shown in the figure below.
AK602566AC
Hall ICStator
Yo k e
Fixed to the motor cover Magnet Throttle shaft
To ECM
AK604555Magnet flux Fully opened Fully closedHall IC
Half opened
Hall ICAB

SENSOR
MULTIPORT FUEL SYSTEM (MFI)13A-21
.
GENERATOR FR TERMINAL
Generator turns ON/OFF the power transistor in the voltage
regulator to adjust current flow in the field coil according to
alternator output current. In this way generator's output voltage
is kept adjusted (to about 14.7 V). The ratio of power transistor
ON time (ON duty) is output from generator FR terminal to
ECM. ECM uses this signal to detect generator's output current
and drives throttle actuator control motor according to output
current (electric load). This prevents change in idle speed due
to electric load and helps maintain stable idle speed.
.
AK602229AD
FR BS
Field coil
IC regulator
GeneratorIgnition switch-IG
Battery
ECM

ACTUATOR
MULTIPORT FUEL SYSTEM (MFI)13A-24
THROTTLE ACTUATOR CONTROL MOTOR
A throttle actuator control motor is installed in throttle body. The
throttle actuator control motor performs the Open/Close of the
throttle valve through the reduction gear. ECM changes current
direction according to the Open/Close direction and also
changes current to the motor coil to control the throttle actuator
control motor.
Throttle actuator control motor is composed of a good
response, low energy, and small DC motor with brush and can
generate rotation force corresponding to the current applied on
the coil. When there is no current passing through the throttle
actuator control motor, the throttle valve remains at a pre
-
scribed opening angle. So, even if current stops because of a
fault in the system, a minimum level of running remains possi
-
ble.
AK604125AB
Throttle body
Throttle actuator
control motor
AK602231
Throttle actuator
control motor
Throttle actuator
control motor relayMFI relay
To ECM
Power supplyOFFON
OFF
ON
AE
From battery
ECM

THROTTLE VALVE OPENING ANGLE CONTROL AND IDLE SPEED CONTROL
MULTIPORT FUEL SYSTEM (MFI)13A-38
THROTTLE VALVE OPENING ANGLE CONTROL AND IDLE
SPEED CONTROL
M2132003500328
ECM detects the amount of accelerator pedal
depression (as per operator's intention) through the
accelerator pedal position sensor. Based on pre-set
basic target opening angles it adds various compen
-
sations and controls the throttle valve opening angle
according to the target opening angle.
While starting
ECM adds various compensations to the target
opening angle that are set based on the engine cool
-
ant temperature, so that the air volume is optimum
for starting.
While idling
ECM controls the throttle valve to achieve the target
opening angle that are set based on the engine cool
-
ant temperature. In this way best idle operation is
achieved when engine is cold and when it is hot.
Also, the following compensations ensure optimum
control.
While driving
Compensations are made to the target opening
angle set according to the accelerator pedal opening
angle and engine speed to control the throttle valve
opening angle.
AK602236AE
Throttle
position
sensorMain
Main Sub
SubMotor drive circuit
A/C switch (CAN) Engine coolant
temperature sensor
Intake air temperature
sensor
Crankshaft position sensor
Power steering pressure
switch
Generator FR terminal
Transmission range
switch (CAN) Motor drive power supply
(From throttle actuator
control motor relay)
Throttle actuator
control motor
Control unit
Barometric pressure
sensor Accelerator
pedal position
sensor
ECM

GENERAL INFORMATION
FOUR-WHEEL ANTI-LOCK BRAKE SYSTEM (4ABS)35B-5
ABS ELECTRICAL DIAGRAM
AC609237
Ignition
switch (IG1) Fusible
link No.34Fusible
link No.36 Fusible
link No.27Fusible
link No.26
Analog
interface
circuitAnalog
interface
circuit CAN drive circuit
Interface circuit
Solenoid valve Stoplight
switch
Motor Hydraulic unitStoplightEngine
control
module Data link
connector
Solenoid valve
power supplySolenoid valve
power supply
Motor power supplyMotor power supplyPower supplyCAN drive
circuit
Interface
circuit
CAN transceiver
circuit
CPU
LED drive
circuitInterface
circuit
Interface circuit
Wheel speed sensor (FL) (FR) (RL) (RR)Relay box
(Engine
compartment)
Combination
meter
AB
ABS-ECUCAN drive
circuit
Interface
circuit ETACS-ECU

CONSTRUCTION DESCRIPTION
FOUR-WHEEL ANTI-LOCK BRAKE SYSTEM (4ABS)35B-7
ABS-ECUM2351003000520
•By integrating ABS-ECU into the hydraulic unit,
no wiring harness for sending drive signal of the
solenoid valve and pump motor is required,
assuring higher reliability.
•Self-diagnostic and memory functions are inte-
grated into ABS-ECU. If any malfunction is
detected by the self-diagnostic function,
ABS-ECU activates a fail-safe function and illumi
-
nates the ABS warning light and brake warning
light
*.
NOTE: *: The brake warning light is used as the
EBD control warning light.
•ABS-ECU detects vehicle speed from the signals
of the wheel speed sensor and its recognizes the
wheel rotation status, estimates the wheel slip
condition based on the preprogrammed algo
-
rithm, and then controls the solenoid valve in the
hydraulic unit so that the wheels do not lock.
ABS hydraulic pressure control
ABS control cycle
1. The ABS-ECU calculates the speed and deceler-
ation of each wheel based on the signals from the
four wheel speed sensors, and estimates the
vehicle speed at that time.
2. When the brake pedal is depressed, the brake
fluid pressure applied to the wheel cylinder
increases, and the wheel speed decreases.
When the difference between the wheel speed
and vehicle speed increases, and the vehicle
deceleration goes below the specified value (Point A), ECU determines that the wheels are
about to be locked. At this time, ECU reduces the
brake fluid pressure by outputting the pressure
decrease signal to the solenoid valves (IN, OUT).
(between a and b)
3. When the vehicle deceleration and wheel speed
begin recovery, and the vehicle speed reaches
the point B, ECU outputs the pressure hold signal
to maintain the wheel cylinder fluid pressure.
(between b and c)
AC506830AB
a
b
cd A
BC
D
e Increase
Hold
Decrease
Wheel speed
Brake pressureActual vehicle speedEstimated vehicle speed

CONSTRUCTION DESCRIPTION
FOUR-WHEEL ANTI-LOCK BRAKE SYSTEM (4ABS)35B-9
STARTUP CHECK
.When the startup vehicle speed reaches approxi-
mately 10 km/h (6 mph), ABS-ECU performs the fol-
lowing checks.
1. Motor, solenoid valve check (Initial startup* only)
Turns ON the motor relay in ECU, and checks the
pump motor operation. At the same time,
ABS-ECU sequentially energizes each solenoid
valve in a very short period and checks the valve
operation.
NOTE: *: Initial startup indicates a first startup
after the system has started.
2. Wheel speed sensor check
ABS-ECU checks for any wheels that have not
received wheel speed sensor signal from the
startup.
CONSTANT CHECK
.ABS-ECU constantly checks the following items.
1. ABS-ECU
Performs self-diagnosis in ECU.
2. ECU power supply
Checks if ECU power supply voltage stays within
the operational range.
3. Wheel speed sensor
(1) Monitors the output voltage of the sensor
signal wiring harness and checks for abnormal
output voltage (open/short circuit).
(2) Checks for any wheels that do not send pulse
signal while the vehicle is in motion.
(3) Checks if wheel speed which is abnormally
higher or lower than the vehicle speed is input.
4. Pump motor, solenoid valve
Checks that the ABS-ECU output signal and the
operating conditions of the pump motor and
solenoid valve agree with each other.
CAN COMMUNICATION
ABS-ECU outputs the ABS warning light and the
EBD warning light
* illumination request signals to the
combination meter through CAN communication.
NOTE: *: The brake warning light is used as EBD
control warning light.
FAIL-SAFE FUNCTION
If any malfunction is detected by the self-diagnostic
function, ABS-ECU illuminates the ABS warning light
and brake warning light
*, and it disables ABS and
EBD control.
NOTE: *: The brake warning light is used as EBD
control warning light.
DTC
No.ItemCountermeasures for failure
EBD controlABS controlBrake
warning lightABS warning
light
C100AAbnormality in FL wheel speed
sensor circuitExecuted
(Prohibited
when two or
more wheels
are faulty.)ProhibitedExtinguished*2Illuminated*3
C1015Abnormality in FR wheel speed
sensor circuit
C1020Abnormality in RL wheel speed
sensor circuit
C102BAbnormality in RR wheel speed
sensor circuit
C1011Abnormality in FL wheel speed
sensor signalExecuted
(Prohibited
when two or
more wheels
are faulty.)ProhibitedExtinguished*2Illuminated*3
C101CAbnormality in FR wheel speed
sensor signal
C1027Abnormality in RL wheel speed
sensor signal
C1032Abnormality in RR wheel speed
sensor signal

CONSTRUCTION DESCRIPTION
FOUR-WHEEL ANTI-LOCK BRAKE SYSTEM (4ABS)35B-10
C1014Mutual monitoring of FL wheel
speed sensorExecuted
(Prohibited
when two or
more wheels
are faulty.)ProhibitedExtinguished*2Illuminated*3
C101FMutual monitoring of FR wheel
speed sensor
C102AMutual monitoring of RL wheel
speed sensor
C1035Mutual monitoring of RR wheel
speed sensor
C1041Abnormality in periodical signal
for FL wheel speed sensorExecuted
(Prohibited
when two or
more wheels
are faulty.)ProhibitedExtinguished*2Illuminated*3
C1042Abnormality in periodical signal
for FR wheel speed sensor
C1043Abnormality in periodical signal
for RL wheel speed sensor
C1044Abnormality in periodical signal
for RR wheel speed sensor
C1046FL wheel speed sensor control
phase time exceededExecuted
(Prohibited
when two or
more wheels
are faulty.)ProhibitedExtinguished*2Illuminated*3
C1047FR wheel speed sensor control
phase time exceeded
C1048RL wheel speed sensor control
phase time exceeded
C1049RR wheel speed sensor control
phase time exceeded
C104BAbnormality in FL wheel inlet
valve systemProhibitedProhibitedIlluminatesIlluminates
C104FAbnormality in FR wheel inlet
valve system
C1053Abnormality in RL wheel inlet
valve system
C1057Abnormality in RR wheel inlet
valve system
C105FAbnormality in FL wheel outlet
valve systemProhibitedProhibitedIlluminatesIlluminates
C1063Abnormality in FR wheel outlet
valve system
C1067Abnormality in RL wheel outlet
valve system
C105BAbnormality in RR wheel outlet
valve system
C2104Malfunction of valve power
supply circuitProhibitedProhibitedIlluminatesIlluminates
C1073Malfunction of motor drive
circuitExecutedProhibitedExtinguishedIlluminated*3
DTC
No.Item Countermeasures for failure
EBD control ABS control Brake
warning lightABS warning
light