2006 MITSUBISHI COLT fuel pump

GENERAL INFORMATION
MULTIPOINT FUEL INJECTION (MPI) <4G1>13B-4
CONTROL SYSTEM DIAGRAM
AK600529AB
6 Oil feeder control valve
1 Oxygen sensor
(front)
8 Engine coolant
temperature sensor
3
Throttle valve control servo
10
Throttle position sensor (main)
5 Throttle position sensor (sub)
2 Purge control
solenoid valve
4 Fuel pressure
solenoid valve
7 Crank angle sensor
9
Detonation sensor
4
Intake air
temperature
sensor
3
Air flow sensor
Waste gate
actuator Canister
Check
valve Air by-pass valve
Fuel pressure regulatorFrom
fuel pump
To fuel
tank
Catalytic converter
Catalytic
converter
Air
inlet
Oxygen sensor (front)
Oxygen sensor (rear)
Air flow sensor
Intake air temperature
sensor
Throttle position
sensor
(sub)
Camshaft position
sensor
Crank angle sensor
Engine coolant
temperature sensor
Detonation sensor
Throttle position
sensor (main) Power supply
Ignition switch-IG
Ignition switch-ST
Accelerator pedal
position sensor
(main)
Accelerator pedal
position sensor
(sub)
Alternator FR
terminal
Stop lamp switch
Clutch switchEngine-
ECUEngine control relay
Fuel pump relay
A/C compressor relay
Throttle valve
control servo relay
Ignition coil
Cooling fan
control relay
(Hi, Lo)
Diagnosis output
Alternator G terminal
Oxygen sensor (front)
heater
Oxygen sensor (rear)
heater
Barometric
pressure
sensor
1 Injector
5 Waste gate
solenoid valve
2 Oxygen sensor
(rear)
6 Camshaft position sensor
1
2
3
4
5
6
7
8
9
10 Injector
Purge control
solenoid valve
Throttle valve
control servo
Fuel pressure
solenoid valve
Waste gate
solenoid valve
Oil feeder control
valve
1
2
3
4
5
6

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

FUEL INJECTION CONTROL
MULTIPOINT FUEL INJECTION (MPI) <4G1>13B-7
FUEL INJECTION CONTROL
M2132003000851
The following control is basically the same as those
of the 4G6-MIVEC engine used in the GRANDIS, the
following improvements have been added.•Fuel pressure control solenoid valve
In accordance with the signal received from the
engine-ECU, the fuel is controlled.
System Configuration Diagram
AK401883AD
Air flow sensor
Barometric pressure sensor
Intake air temperature sensor
Engine coolant temperature sensor
Throttle position sensor
Accelerator pedal position sensor
Detonation sensor
Camshaft position sensor
Crank angle sensor
Ignition switch-ST
Oxygen sensor (front)
Oxygen sensor (rear)
Engine-
ECU
Injector from
fuel pump
To
fuel tank Fuel pressure regulator
Fuel pressure control
solenoid valve
Oil feed
er con t rol valveThe oil fee der control va lve , which is actuate d by the
signals re
ceived f r om th e eng ine-ECU, co ntrols the
valve timing.
Oxygen sensor he ater Tu rns ON a nd OFF the o x ygen senso r heate r circuit
in
accordan ce wit h the sign als rece ive d from the
en
gine-ECU.
Fuel p r essure control solenoid va lveControls the fue l pressure in a cco rdance with the
signals re
ceived f r om th e eng ine-ECU.
Wa ste g a te solen o id valveControls the boo st pre s sure tha t af fe ct s th e waste
ga
te actuator in accord ance with signals re ceived
from the
engin e -ECU.
ECU
Nam
e Func tion

FUEL PRESSURE CONTROL
MULTIPOINT FUEL INJECTION (MPI) <4G1>13B-10
FUEL PRESSURE CONTROL
M2132020000069
Normally, the negative pressure in the intake mani-
fold acts upon the fuel pressure regulator to maintain
the fuel pressure at a constant level with regard to
the pressure inside the intake manifold, causing the
amount of fuel injected to be controlled proportion to
the injector drive time. However, if the engine is
started while the engine coolant temperature and the
intake air temperature are high, the engine-ECU makes current flow to the fuel pressure control sole
-
noid valve to activate the fuel pressure regulator by
means of atmospheric pressure. Because of this, the
generation of fuel vapour due to the high fuel pres
-
sure and high temperature is avoided, and the idling
stability immediately after restarting the engine at
high temperature is maintained.
AK402663
To fuel
tank
From
fuel
pump
Fuel pressure
regulator
Fuel pressure
control solenoid
AB
Engine control
relay
Engine coolant temperature
sensorIntake air temperature
sensor
Engine-ECU
Battery

OTHER CONTROL FUNCTIONS
MULTIPOINT FUEL INJECTION (MPI) <4G1>13B-12
OTHER CONTROL FUNCTIONS
M2132010000648
The following controls are basically the same as
those of the 4G1-Non-Turbo engine used in the
COLT.
•ENGINE CONTROL RELAY CONTROL
•THROTTLE VALVE CONTROL SERVO RELAY
CONTROL
•MIVEC (Mitsubishi Innovative Valve Timing Elec-
tronic Control System)
•FUEL PUMP RELAY CONTROL
•OXYGEN SENSOR (front) HEATER CONTROL
•OXYGEN SENSOR (rear) HEATER CONTROL
•FAN RELAY CONTROL
•A/C RELAY CONTROL
•ALTERNATOR CONTROL

DIAGNOSIS SYSTEM
MULTIPOINT FUEL INJECTION (MPI) <4G1>13B-18
NOTE: Items marked "*" will not appear if a data list is selected in the check mode.
ACTUATOR TEST FUNCTION
The actuator test items are given in the table below
Item No.Inspection itemDrive contents
01InjectorsCut fuel to No.1 injector
02Cut fuel to No.2 injector
03Cut fuel to No.3 injector
04Cut fuel to No.4 injector
07Fuel pumpFuel pump operates and fuel is recirculated
08Purge control solenoid valveSolenoid valve turns from OFF to ON
12Waste gate solenoid valveSolenoid valve turns from OFF to ON
17Basic ignition timingSet to ignition adjustment mode
20Cooling fan control relay (high speed)Drive the fan motor at high speed
21Cooling fan control relay (low speed)Drive the fan motor at low speed
34Throttle valve control servoStop the throttle valve control servo
12*Air flow sensorgm/s
13*Intake air temperature sensor°C
21*Engine coolant temperature sensor°C
22*Crank angle sensorr/min
24*Vehicle speedkm/h
44*Ignition advancedeg
8A*Throttle position sensor (main)%
A1*Oxygen sensorV
Item No. Inspection item Unit

GENERAL INFORMATION
FUEL SUPPLY13C-2
GENERAL INFORMATION
M2134000100639
The fuel system consists of the following compo-
nents:
•Fuel injector
•Fuel delivery pipe
•Fuel pressure regulator <4G1>
•Fuel vapour canister
•Fuel tank
•Fuel tank pump and gauge assembly
SPECIFICATIONS
ItemSpecification
Fuel tank capacity L45
Fuel pump typeElectric
Fuel pump pressure regulator control pressure kPa <4A9>324
Fuel pressure regulator control pressure kPa <4G1>294
Fuel injectorTy p eElector-magnetic
Quantity4
Evaporative emission control systemFuel vapour canister

GENERAL INFORMATION
FUEL SUPPLY13C-3
CONSTRUCTION DIAGRAM
AC403658AC
<4A9>
Fuel vapour canister
Fuel delivery pipe
Fuel injector Fuel tank
Fuel tank pump and
gauge assembly
AC601428AB
<4G1>
Fuel injector
Fuel tank
Fuel tank pump and
gauge assembly
Fuel vapour canister
Fuel delivery pipe
Fuel pressure
regulator
This fuel system is designed with considerat ion fo r
globa
l environ ment protection to ensure safety at a
collision,
reduce weigh t, and imp r ove re lia bility a nd
quality
. This system h a s th e following feature s :
•The intern al struct ure of t he fue l va pour canister
has bee
n improve d to re duce emission o f the
va
pour g a s into the air .
•The use of the fuel re turn less system, in wh ich
the
fuel pump pressure re gula t or is incorpora t ed
in
the fu el t ank pump and gauge assemb ly ,
allows t
he fue l return pipe and h o se to be d i scon
-
tinued, and red u ces weigh t. <4A9>
•In or der to ensu r e saf e ty a t a collision, the fuel
syst
em comp onent s such as the fue l line ho se
and
the fu el vapour canister in the engine com
-
pa rt men t were placed o n t he t r ansmissio n sid e to
avoid
interfe r ence with surroun ding componen t s .