Page 332 of 364
DESCRIPTION OF CONSTRUCTION AND OPERATION
ACTIVE STABILITY CONTROL SYSTEM (ASC)35C-22
When the brake fluid pressure is held by the TCL control/stability control (Example:
When the front-left/rear-right whee l system pressure is held)
AC600863AF
MP
Master cylinder
Hydraulic unit
Cut valve
Motor Outlet valve
(RR)Inlet valve (RR)
Wheel cylinder (RR) Suction valve
Pressure sensor
Inlet valve
(FL)
Pump
Outlet valve (FL) Wheel cylinder (FL)
By closing the inlet va lve (FL/RR) and o u tle t valve
(FL/RR), the br
ake f l uid pressure in the wh eel cylin
-
der can be main t a ined.
VA L VE CONDITION
ItemPower statusOpen/Close
Suction valveONOpen
Cut valveONClosed
Inlet valve (FL)ONClosed
Inlet valve (RR)ONClosed
Outlet valve (FL)OFFClosed
Outlet valve (RR)OFFClosed
Page 333 of 364

DESCRIPTION OF CONSTRUCTION AND OPERATION
ACTIVE STABILITY CONTROL SYSTEM (ASC)35C-23
When the brake fluid pressure is reduced by the TCL control/stability control
(Example: When the front-lef t wheel system pressure is reduced/rear-right is held)
AC600863
Master cylinder
AG
Hydraulic unit
Suction valve
Cut valve Pressure sensor
Pump
Motor
MP
Outlet valve
(RR) Outlet valve (FL)
Inlet valve (RR)
Inlet valve
(FL)
Wheel cylinder (RR) Wheel cylinder (FL)
By open ing t he out let valve (FL), the fluid p r essure
applied to
the whee l cylinder (FL ) is returne d to the
master cylinder th
rough t he su ction va lve , reducing
the brake fluid p
r essure in the whe e l cylinder (FL).
The bra
k e fluid p r essure in the whe e l cylinder (RR)
can b
e held by keep ing t he in let valve (RR) and o u t
-
let valve (RR) clos ed.
VA L VE CONDITION
ItemPower statusOpen/Close
Suction valveONOpen
Cut valveONClosed
Inlet valve (FL)ONClosed
Inlet valve (RR)ONClosed
Outlet valve (FL)ONOpen
Outlet valve (RR)OFFClosed
Page 334 of 364
DESCRIPTION OF CONSTRUCTION AND OPERATION
ACTIVE STABILITY CONTROL SYSTEM (ASC)35C-24
Traction control operation
ASC-ECU receives various kinds of information from
the engine ECU, steering wheel sensor, G and yaw
rate sensor, and wheel speed sensor. When
ASC-ECU determines that the driving wheel is slip
-
ping, it suppresses the wheel slippage. At this time,
ASC-ECU controls the brake fluid pressure of the
driving wheel determined to be slipping so that the
torque is transferred to another driving wheel. The operations of suction valve, cut valve, and solenoid
valve are basically the same as that of the stability
control. ASC-ECU and the engine ECU communi
-
cate with each other via CAN bus line. When the
accelerator pedal is depressed too far, the signal
requesting the engine output reduction is sent to the
engine ECU so that the TCL controllability can be
secured.
Page 352 of 364

CVT
CONTINUOUSLY VARIABLE TRANSMISSION (CVT)23-4
DIAGNOSIS CLASSIFICATION TABLE
M2231015000056
ItemDiagnosisData listActuator
test
Code No.Trouble symptomsItem No.Display
Crank angle sensor−−01r/min−
CVT fluid temperature sensor15Open circuit08°C−
16Short circuit
Line pressure sensor18Open circuit09MPa−
19Short circuit
Turbine speed sensor22Open circuit02r/min−
Primary speed sensor23Open circuit03r/min−
26System failure
Secondary speed sensor24Open circuit04r/min−
25System failure
Accelerator pedal position sensor (APS)−−06mV−
Primary pressure sensor27Open circuit11MPa−
28Short circuit
Gear ratio−−12Displays the
gear ratio.−
Line pressure control solenoid valve31Open circuit/short
circuit 16%01
Shift control solenoid valve32Open circuit15%02
36Short circuit
Damper clutch control solenoid valve33Open circuit14%03
37Short circuit
Clutch pressure control solenoid valve34Open circuit17%04
38Short circuit
Shift system42System failure−−−
Damper clutch system44System failure10r/min−
45
Clutch system46System failure−−−
48
Inhibitor switch51Open circuit26P/R/N/D/Ds/L−
52Short circuit
Stop lamp switch53Open circuit33ON/OFF−
54Short circuit
Battery voltage−−24V−
CVT control relay56Open circuit25V11
Steel belt system59System failure−−−
Line pressure system57System failure−−−
71
72
Page 362 of 364
ENGINE CONTROL
ENGINE AND EMISSION CONTROL17-2
ENGINE CONTROL
ACCELERATOR SYSTEMM2170003000310
For the accelerator system, an electronic throttle
valve control system has been adopted, eliminating
of an accelerator cable. This system detects the
amount of the accelerator pedal movement by using
a accelerator pedal-position sensor in the accelerator
pedal assembly for electronic control of the throttle
valve angle.
CONSTRUCTION DIAGRAM
AC206106
Accelerator pedal assembly
(Built-in accelerator pedal
position sensor)
Accelerator pedal
arm stopper
AD
Page 363 of 364

EMISSION CONTROL
ENGINE AND EMISSION CONTROL17-3
EMISSION CONTROL
GENERAL INFORMATION <4A9>M2171000100838
Although the emission control systems are basically
the same as those of the 4G1-Non-Turbo engine
used in the COLT, the following improvements have
been added.•The adoption of the catalytic converter just
beneath exhaust manifold realizes the earlier
activation.
•The adoption of the dual oxygen sensor has
increased reliability air/fuel ratio control.
•
SystemRemarks
Crank case ventilaton systemClosed type
Evaporative emission control systemElectronic control type with duty signal
Exhaust gas recirculation (EGR) system Electronic control (stepper motor) type
Air/fuel ratio closed loop controlOxygen sensor signal used
Catalytic converterThree-way catalytic converter
The abolition of the EGR system .
EMISSION CONTROL SYSTEM DIAGRAM
AK402829
Oxygen sensor (front)
Oxygen sensor (rear)
Air
inlet
EGR valve
(stepper motor)
Canister
Purge control
solenoid valve
Injector
PCV valve
ACCatalytic converter From
fuel pump
Page 364 of 364

EMISSION CONTROL
ENGINE AND EMISSION CONTROL17-4
GENERAL INFORMATION <4G1>
M2171000100849
Although the emission control systems are basically
the same as those of the 4G1-Non-Turbo engine
used in the COLT, the following improvements have
been added.
•The adoption of the catalytic converter just
beneath turbo charger and under the floor
increased the performance of the emission con
-
trols.
•The adoption of the check valve between the
purge control solenoid valve and the canister pro
-
tects the regurgitation as turbocharging.
•
SystemRemarks
Crank case ventilaton systemClosed type
Evaporative emission control systemElectronic control type with duty signal
Air/fuel ratio closed loop controlOxygen sensor signal used
Catalytic converterThree-way catalytic converter
The abolition of the EGR system
EMISSION CONTROL SYSTEM DIAGRAM
AK600530AB
Canister
Purge control
solenoid valve Fuel pressure control
solenoid valve
Check valve
Waste gate
solenoid valve Waste gate
actuator
Air
inlet
Catalytic
converter
Catalytic
converter Injector
From
fuel pump
Fuel pressure
regulator
To
fuel tank
Oxygen sensor
(front)
Oxygen sensor
(rear)