2008 MITSUBISHI LANCER EVOLUTION X Workshop Manual

CONSTRUCTION DESCRIPTION
FOUR-WHEEL ANTI-LOCK BRAKE SYSTEM (4ABS)35B-8
4. When the wheel speed deceleration is further
recovered and overpasses the point C, ECU
determines that the wheel lock possibility has
been eliminated and increases the brake fluid
pressure by outputting the pressure increase sig
-
nal again. (between c and d)
5. Brake fluid pressure is controlled by repeating the
increase and hold of the pressure. (between d
and e)
6. When the wheel deceleration goes below the
threshold again, ABS-ECU controls the brake
fluid pressure by repeating the cycle (Step 2 to 5).
Four-wheel control
ABS fluid pressure is controlled independently for
four wheels.
EBD fluid pressure control
EBD control is activated in a range with lower slip
ratio where ABS is disabled. EBD calculates vehicle
deceleration and slip amount of the four wheels
based on the wheel speed sensor signal. If the rear
wheel speed differs from the vehicle speed by a cer
-
tain level or more, EBD increases, holds, and
decreases the pressure at the rear wheel control
solenoid valve in the hydraulic unit, and then adjusts
rear wheel brake fluid pressure fairly close to an
ideal distribution curve.
INITIAL CHECK
ABS-ECU performs the following initial checks using
the diagnostic functions. ABS-ECU illuminates the
ABS warning light for 3 seconds (including the initial
check)
* after the ignition switch is turned ON. If any
malfunction is detected, ABS-ECU continues illumi
-
nating the ABS warning light and disables ABS con-
trol.
NOTE: *: The ABS warning light may stay on after
the ignition switch is turned ON until the startup vehi
-
cle speed reaches approximately 10 km/h (6 mph).
As the ABS-ECU memorizes any diagnostic trouble
code related to the wheel speed sensor malfunction
recorded during the previous ignition ON status,
ABS-ECU continues illuminating the ABS warning
light until it verifies that the malfunction for that code
is resolved (startup check).
.
INITIAL CHECK
Performs self-diagnosis in ABS-ECU.
AC208548AB
Ideal distribution curve when
seated by fixed personsEBD operating conceptual design
Rear braking force
Ideal distribution curve when seated by one personsBraking force distribution curve
by the existing proportioning valveBraking force distribution
by EBD control
Front braking forceBraking Force
Improved

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

CONSTRUCTION DESCRIPTION
FOUR-WHEEL ANTI-LOCK BRAKE SYSTEM (4ABS)35B-11
NOTE: .
•*1 This diagnostic trouble code is not set within
the vehicle speed of 20 km/h (12 mph) or less.
•*2 Turns ON when two or more wheels are faulty.
•*3 Stays ON until the vehicle speed reaches 10
km/h (6 mph) when the ignition switch is turned to
ON next time.
DIAGNOSTIC FUNCTION
ABS-ECU has the following functions for easier sys-
tem checks. The following items can be diagnosed
using scan tool.
•Diagnostic trouble code set
•Service data output
•Actuator test.
DIAGNOSTIC TROUBLE CODE SET
There are 43 diagnosis items. Since all the diagnos-
tic results are recorded in volatile memory
(EEPROM*), they are stored in the memory even
though the battery terminals are disconnected.
NOTE: .
•*EEPROM (Electrical Erasable & Programmable
ROM): Special type of memory that can be pro
-
grammed or erased electrically
•For each diagnosis item, refer to Service Manual.
.
SERVICE DATA OUTPUT
Using scan tool, the input data sent from the sensors
and switches can be read.
NOTE: For service data items, refer to Service Man-
ual.
.
C2116Abnormality in pump motor
power supply voltageExecutedProhibitedExtinguishedIlluminated*3
C1000Abnormality in stop light switch
circuitExecutedExecutedExtinguishedExtinguished
C2200Abnormality in ABS-ECUProhibitedProhibitedIlluminatesIlluminates
C2100Battery
voltage
problem (low
voltage)9.7 ± 0.3 V or
less
*1
ExecutedProhibitedExtinguishedIlluminates
8.0 ± 0.5 V or
less
*1
ProhibitedProhibitedIlluminatesIlluminates
C2101Battery
voltage
problem (high
voltage)18.0 ± 1.0 V or
moreProhibitedProhibitedIlluminatesIlluminates
C1395Brake fluid filling not completedExecutedExecutedExtinguishedFlashes (1 Hz)
C2203VIN not writtenExecutedExecutedExtinguishedIlluminates
C1608Implausible diagnosis dataExecutedExecutedExtinguishedExtinguished
U0001Bus offExecutedExecutedExtinguishedExtinguished
U0100Engine time-out errorExecutedExecutedExtinguishedExtinguished
U0141ETACS time-out errorExecutedExecutedExtinguishedExtinguished
U1415Variant coding not implementedExecutedProhibitedExtinguishedIlluminates
U1417Invalid variant coding value
(including wrong assembly)ExecutedProhibitedExtinguishedIlluminates
DTC
No.Item Countermeasures for failure
EBD control ABS control Brake
warning lightABS warning
light

CONSTRUCTION DESCRIPTION
FOUR-WHEEL ANTI-LOCK BRAKE SYSTEM (4ABS)35B-12
ACTUATOR TEST
Using scan tool, the actuators can be forcibly oper-
ated.
NOTE: .
•When ABS-ECU is disabled, the actuator test
cannot be performed.
•The actuator test can be performed only when
the vehicle is stationary. When the vehicle speed
reaches 10 km/h (6 mph), the forcible actuator
operation is disabled.
•During actuator test, the ABS warning light
flashes in 2Hz, and ABS control is prohibited.
•For the actuator test specification, refer to Ser-
vice Manual.

34-1
GROUP 34
REAR SUSPENSION
CONTENTS
GENERAL INFORMATION . . . . . . . .34-2

GENERAL INFORMATION
REAR SUSPENSION34-2
GENERAL INFORMATIONM2340000100977
The trailing arm type multi-link suspension is
adopted.
.
MAIN FEATURES
•The wheel tread is increased to improve corner-
ing ability.
•The roll center height is modified to improve the
steering ability.
•A double crossmember is adopted and the upper
arm, lower arm, toe control arm are joined to the
crossmember to improve suspension alignment
accuracy and maintenance performance.
•Improvement of arms installation accuracy elimi-
nates the camber adjustment to improve mainte-
nance performance.
•The trailing arm bushings are installed in the
upper position to improve the movement of the
suspension when the vehicle negotiates bumps
and increase riding comfort.
•Twin tube type shock absorber is adopted to
secure optimum rolling rigidity and improve the
steering ability.
•A high efficiency ball joint type stabilizer link is
adopted to improve steering ability.
•The toe control arm is installed in the lower posi-
tion to increase toe and camber rigidity and
improve steering ability.
CONSTRUCTION DIAGRAM
SPECIFICATIONS
.
SUSPENSION SYSTEM
.
AC606248AB
Stabilizer bar

Trailing arm Stay Rear crossmember Toe control armCoil spring Shock absorber
Upper arm
ItemSpecification
Suspension typeTrailing arm type multi-link

GENERAL INFORMATION
REAR SUSPENSION34-3
WHEEL ALIGNMENT
.
COIL SPRING
ItemSpecification
Camber−0°55'
Toe-in mm (in)3 (0.12)
ItemSpecification
DE, ESGT S
Wire diameter mm (in)11 ( 0 . 4 )11 (0.4)
Mean diameter of coil mm (in)91 (3.6)91 (3.6)
Free length mm (in)351 (13.8)334 (13.1)