oil type MITSUBISHI COLT 2006 Service Repair Manual

GENERAL INFORMATION
ENGINE MECHANICAL <4G1>11B-2
GENERAL INFORMATION
M2112000101010
The 4G15-MIVEC-T/C engine employed in the Colt
is designed to provide higher performance and
higher output by using a turbocharger to the
4G15-MIVEC engine employed in the conventional
Colt. The main changes in the conventional
4G15-MIVEC engine are as follows:•Cylinder head gasket changed
•Oil jet added
•Strength improved in piston and piston pin
MAJOR SPECIFICATIONS
Item4G15-MIVEC-T/C
Total displacement mL1,468
Bore × Stro ke mm75 × 82.0
Compression ratio9.0
Compression chamberPentroof-type
Va l v e t i m i n gIntake openingBTDC 34° − AT D C 6°
Intake closingABDC 30° − ABDC 70°
Exhaust openingBBDC 50°
Exhaust closingATDC 10°
Maximum output kW (PS)/rpm113 (154)/6,000
Maximum torque N⋅m (kg⋅m)/rpm210 (21.4)/3,500
Fuel systemElectronically controlled multipoint fuel injection
Ignition systemElectronic-controlled 4-coil

GENERAL INFORMATION
ENGINE MECHANICAL <4A9>11A-2
GENERAL INFORMATION
M2112000100697
The newly developed 1.5L 4A91 engine features
4-cylinder, 16-valve, and double overhead camshafts
(DOHC).
The engine has the following features.
•Aluminum cylinder block
•MIVEC (Mitsubishi Innovative Valve timing Elec-
tronic Control system)
•Selective valve tappet of direct acting valve sys-
tem for valve clearance adjustment
•Timing chain
MAJOR SPECIFICATIONS
Item4A91
Total displacement mL1,499
Bore × Stro ke mm75 × 84.8
Compression ratio10.0
Compression chamberPentroof-type
Va l v e t i m i n gIntake openingBTDC 31° − AT D C 1 9°
Intake closingABDC 21° − ABDC 71°
Exhaust openingBBDC 39°
Exhaust closingATDC 5°
Maximum output kW (PS)/rpm77 (104)/6,000
Maximum torque N⋅m (kg⋅m)/rpm141 (14.4)/4,000
Fuel systemElectronically controlled multipoint fuel injection
Ignition systemElectronic-controlled 4-coil

BASE ENGINE
ENGINE MECHANICAL <4A9>11A-6
REAR OIL SEAL CASE
AK305061AB
AA A-A
The rea
r oil seal ca se is a sheet -met al wor k . The
case is
inst alled with sealant ap plie d onto th e mou n t
-
ing face to prevent oil leaka ge.
PISTON
AK403222
AB
Front mark
Piston pin offset
The pisto n is made of spec ial a l uminu m all o y . W e ig ht
reduction
is a c hieved by minimizin g the o v erall
heigh
t while maximizing th e recess on bo th end s of
the piston
pin.
The center o f the p i sto n pin hole is of fset by 0.5 mm
from t
he ce nter of the piston towards the th rust side .
The piston skirt ha s a streak finish to enha nce oil
retention an
d anti-seizin g prope rty .
ItemDimension
Base diameter mm75
Pin diameter mm18
Overall height mm46.04
PISTON PIN
AK305064
d
AB
D
h
The piston pin is o f a semi-floating type, p r ess-fitte d
into t
he co nnecting rod small end wh ile cap able of
floating re
lative to the piston .
ItemDimension
D (Outer diameter) mm18
d (Inner diameter) mm11
h (Overall length) mm50

GENERAL INFORMATION
ENGINE MECHANICAL <4A9>11A-18
GENERAL INFORMATION
M2112000101009
The newly developed 1.5L 4A91 engine features
4-cylinder, 16-valve, and double overhead camshafts
(DOHC).
The engine has the following features.
•Aluminum cylinder block
•MIVEC (Mitsubishi Innovative Valve timing Elec-
tronic Control system)
•Selective valve tappet of direct acting valve sys-
tem for valve clearance adjustment
•Timing chain
MAJOR SPECIFICATIONS
Item4A91
Total displacement mL1,499
Bore × Stro ke mm75 × 84.8
Compression ratio10.0
Compression chamberPentroof-type
Va l v e t i m i n gIntake openingBTDC 31° − AT D C 1 9°
Intake closingABDC 21° − ABDC 71°
Exhaust openingBBDC 39°
Exhaust closingATDC 5°
Maximum output kW (PS)/rpm77 (104)/6,000
Maximum torque N⋅m (kg⋅m)/rpm141 (14.4)/4,000
Fuel systemElectronically controlled multipoint fuel injection
Ignition systemElectronic-controlled 4-coil

BASE ENGINE
ENGINE MECHANICAL <4A9>11A-22
REAR OIL SEAL CASE
AK305061AB
AA A-A
The rea
r oil seal ca se is a sheet -met al wor k . The
case is
inst alled with sealant ap plie d onto th e mou n t
-
ing face to prevent oil leaka ge.
PISTON
AK403222
AB
Front mark
Piston pin offset
The pisto n is made of spec ial a l uminu m all o y . W e ig ht
reduction
is a c hieved by minimizin g the o v erall
heigh
t while maximizing th e recess on bo th end s of
the piston
pin.
The center o f the p i sto n pin hole is of fset by 0.5 mm
from t
he ce nter of the piston towards the th rust side .
The piston skirt ha s a streak finish to enha nce oil
retention an
d anti-seizin g prope rty .
ItemDimension
Base diameter mm75
Pin diameter mm18
Overall height mm46.04
PISTON PIN
AK305064
d
AB
D
h
The piston pin is o f a semi-floating type, p r ess-fitte d
into t
he co nnecting rod small end wh ile cap able of
floating re
lative to the piston .
ItemDimension
D (Outer diameter) mm18
d (Inner diameter) mm11
h (Overall length) mm50

GENERAL INFORMATION
REAR SUSPENSION34-2
GENERAL INFORMATION
M2340000100825
Newly developed H-shaped torsion beam type sus-
pension has been introduced.
•The coil spring is installed under the rear floor,
the torsion beam and arm assembly is installed in
front of the spare tyre house, and the shock
absorber is installed outside, so that the large
cabin space is achieved.
•The arm bushing with the toe control function is
adopted to optimise the tyre steering angle using
the bushing deflection caused by lateral force
and longitudinal force generated at cornering, so
that the good cornering performance is secured.
•The layout of shock absorber is optimised for
smooth riding.
•Long wheel stroke secures sufficient road holding
quality.
•The hub-integrated unit bearing is adopted for the
wheel bearing for sufficient suspension rigidity
(Refer to GROUP 27, Rear Axle
P.27-2).
•The dumping characteristic of shock absorber
has been changed. <4G1>
•The urethane bump stopper has been adopted to
improve the linearity. <4G1>
•Torsion beam rigidity has been improved <4G1>
CONSTRUCTION DIAGRAM
AC405533AD
Coil spring
Shock absorber
Torsion beam and arm assembly
Arm bushing
Torsion bar
Section A – A
<4G9>
A
A Torsion beam and arm assembly
Section A – A
<4G1>
Torsion beam and arm assembly

GENERAL INFORMATION
REAR SUSPENSION34-3
SPECIFICATIONS
SUSPENSION SYSTEM
ItemSpecification
Suspension typeTorsion beam suspension
WHEEL ALIGNMENT
ItemSpecification
Camber−1°
Toe-inAt the centre of tyre tread mm3
Toe-angle (per wheel)0°09'
COIL SPRING
Item4A94G1
Wire diameter mm1011
Average outside diameter mm75 − 107 − 75111
Free length mm301283

OIL PUMP<4A9>
ENGINE LUBRICATION12-4
OIL PUMP<4A9>
M2120002000044
AK305367AB
Timing chain caseOil pump
inner rotor
Oil pump
outer rotor Oil seal
Cover
Machine screw
A
A-A
A
The oil pump is of a
cyclo i d type, d i rectly driven by
the crankshaf
t.
On the cycloid o il p u mp, as th e inn e r rotor is ro t a ted
by th
e cran kshaf t, the o u ter rot o r also rot a tes. The
result
a n t ch ange in sp at ial volu mes betwee n the
rotors
genera t es p u mping action .
Sp e c ifically , o il is sucked into the exp and ing sp ace
and is pushed
out from the shrinking sp ace.
ItemSpecification
Ty p eCycloid pump
No. of lobesInner rotor10
Outer rotor11
Displacement L/min(6,000 r/min.)35
RELIEF V A L V E<4A9>
M21200030 0004 7
AK305369AB
Plug
A-A
A A
Relief spring
Relief plunger
Timing chain case
The relief valve is of a
plun ger type. The valve re gu-
lates the maximum pre ssu re of lubricatio n oil being
sent
to the e ngin e .
When the pressure of oil from the oil p u mp exceeds
the specified
value, the valve o pens to relieve the
excess flow
.
The excess o il is ret u rned t o the suct ion side of the
oil pump
.

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