coolant MITSUBISHI COLT 2006 Service User Guide

DIAGNOSIS SYSTEM
MULTIPOINT FUEL INJECTION (MPI) <4A9>13A-17
DATA LIST FUNCTION
The data list items are given in the table below
Item No.Inspection itemUnit
11Oxygen sensor (front)mV
13Intake air temperature sensor°C
14Throttle position sensor (sub)mV
16Power supply voltageV
18Cranking signal (ignition switch-ST)ON/OFF
21Engine coolant temperature sensor°C
22Crank angle sensorr/min
25Barometric pressure sensorkPa
29Inhibitor switchP or N/D, DS, L, or R
32Manifold absolute pressure sensorkPa
41Injectorsms
44Ignition advanceBTDC
49A/C relayON/OFF
59Oxygen sensor (rear)mV
67Stop lamp switchON/OFF
68Exhaust gas recirculation valveSTEP
77Accelerator pedal position sensor (sub)mV
78Accelerator pedal position sensor (main)mV
79Throttle position sensor (main)mV
7EVariable valve timing phase angleCA
13*Intake air temperature sensor°C
21*Engine coolant temperature sensor°C
22*Crank angle sensorr/min
24*Vehicle speed sensorkm/h
32*Manifold absolute pressure sensorkPa
44*Ignition advancedeg
81*Long-term fuel compensation%
82*Short-term fuel compensation%
87*Calculated load value%
88*Fuel control conditionOpen loopOL
Closed loopCL
Open loop owing to drive
conditionOL-DRV
Open loop owing to system
malfunctionOL-SYS
Closed loop based on one
oxygen sensorCL-HO2S

DIAGNOSIS SYSTEM
MULTIPOINT FUEL INJECTION (MPI) <4A9>13A-19
Engine-ECU or engine-CVT-ECU
Monitor Item
•Items useful for grasping the engine control con-
dition by the engine-ECU or
engine-CVT-ECU are provided in this
monitor item section.
•Values of these monitor items vary greatly
depending on marginal difference of measure
-
ment conditions, difference of the environment,
aged deterioration of vehicles and so on, and it is
difficult to show the precise specification values.
Therefore, check conditi ons, display range and
movement of values are described.
Item No.Inspection itemDisplay range, numerical value
5AAir-fuel ratio learning value of B zone (Low
speed load)−25 to 25%
5BIdle speed control position learned value−128 to 127STEP
5CIdle speed control position learned value (A/C
load)−128 to 127STEP
6AKnock retardRetards in response to accelerator opening
6BLearned knock retard0 − 100%
6CTarget idle speedChanges in response to engine coolant
temperature
9BAir-fuel ratio learning value of A zone (Low
load)−25 to 25%
9DAir-fuel ratio feedback integration−25 to 25%
B2Alternator G terminal dutyIncreases
B3Purge control solenoid valve duty0 − 100%
81*Long-term fuel compensation−25 to 25%
82*Short-term fuel compensation−25 to 25%
87*Calculation load value0 − 100%
88*Fuel control conditionChanges depending on driving condition
NOTE: *: This item is not displayed when the data list in check mode is selected.

GENERAL INFORMATION
MULTIPOINT FUEL INJECTION (MPI) <4G1>13B-3
SYSTEM BLOCK DIAGRAM
AK600528
Barometric pressure sensorEngine control unitEngine-ECU
[1] Fuel injection control
[2] Throttle valve opening control
and idle speed control
[3] MIVEC (Mitsubishi Innovative
Valve timing Electronic
control system)
[4] Ignition timing control
[5] Engine control relay control
[6] Throttle valve control servo
relay control
[7] Fuel pump relay control
[8] Oxygen sensor (front) heater
control
[9] Oxygen sensor (rear) heater
control
[10] Fuel pressure control
[11] Waste gate control
[12] Fan relay control
[13] A/C compressor relay
control
[14] Alternator control
[15] Purge control
[16] Diagnostic output
[17] RAM data transmission Throttle valve control unit
Throttle opening feedback control
Engine coolant
temperature sensor Intake air temperature sensor Air flow sensor
Accelerator pedal
position sensor (main) Throttle position sensor (sub)
Camshaft position sensor
Crank angle sensor
Oxygen sensor (front)
Oxygen sensor (rear)
Alternator FR terminal
Clutch switch
Detonation sensor
Ignition switch-IG
Ignition switch-ST
Stop lamp switch
Power supply
Throttle position sensor (main)
Accelerator pedel
position sensor (sub)
Throttle valve control servo No.1 injector
No.2 injector
No.3 injector
No.4 injector
No.1 Ignition coil
No.2 Ignition coil
No.3 Ignition coil
No.4 Ignition coil
Engine control relay
Throttle valve control servo relay
Waste gate solenoid valve
A/C compressor relay
Fuel pump relay
Alternator G terminal
Cooling fan control relay (Hi, Lo)
Purge control solenoid valve
Diagnostic output terminal
Oxygen sensor (front) heater
Oxygen sensor (rear) heater Oil feeder control valve
(for MIVEC)
Fuel pressure control
solenoid valve
AB

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-5
List of Component Functions
ECU
NameFunction
Engine-ECUThe signals that are input by the sensors enable the
actuators to be controlled in accordance with the
driving conditions.
Sensor
Ignition switch-IGThis signal indicates the ON/OFF condition of the
ignition switch. When this signal is input, the
engine-ECU supplies power to the crank angle
sensor, camshaft position sensor, etc.
Ignition switch-STThis signal indicates that the engine is cranking.
Based on this signal, the engine-ECU controls the
fuel injection, throttle valve position, and the injection
timing that are suited for starting the engine.
Air flow sensor This signal, which indicates the intake air flow rate
(mass), is input into the engine-ECU. Based on the
signals from this sensor, the engine-ECU effects fuel
injection control.
Oxygen sensor This sensor, which contains zirconia and platinum
electrodes, detects the level of oxygen concentration
in the exhaust gases. The engine-ECU determines
whether the air-fuel ratio is at the optimal
stoichiometric ratio in accordance with this oxygen
concentration level.
Barometric pressure sensorThis sensor detects the altitude of the vehicle. It
enables the engine-ECU to make fuel injection
volume corrections in order to achieve an appropriate
air-fuel ratio.
Intake air temperature sensorThis sensor, which contains a thermistor, detects the
temperature of the intake air. The engine-ECU
makes fuel injection volume corrections that suit the
intake air temperature, in accordance with the
voltage that is output by this sensor.
Engine coolant temperature sensorThis sensor, which contains a thermistor, detects the
temperature of the engine coolant. The engine-ECU
determines the warm-up condition of the engine in
accordance with the voltage that is output by this
sensor, in order to control the fuel injection volume,
idle speed, and ignition timing.
Throttle position sensor This sensor detects the position of the throttle valve
and inputs it into the engine-ECU. Based on the
voltage that is output by this sensor, the engine-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. Based on the
voltage that is output by this sensor, which
determines the accelerator position (and the intention
of the driver), the engine-ECU effects appropriate
fuel injection and throttle valve position controls.

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

IGNITION TIMING AND DISTRIBUTION CONTROL
MULTIPOINT FUEL INJECTION (MPI) <4G1>13B-9
IGNITION TIMING AND DISTRIBUTION CONTROL
M2132005000761
This control system is basically the same as that of
the 4G1-Non-Turbo engine used in the COLT.
System Configuration Diagram
AK402031
Ignition switch-IG
Ignition
coil Battery
Spark plug
Cylinder No. 1 2 3 4
Air flow sensor
Intake air temperature sensor
Barometric pressure sensor
Engine coolant temperature
sensor
Camshaft position sensor
Crank angle sensor
Detonation sensor
Ignition switch-ST
Clutch switch
Engine-
ECU
AH

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

DIAGNOSIS SYSTEM
MULTIPOINT FUEL INJECTION (MPI) <4G1>13B-14
DIAGNOSIS SYSTEM
M2132009000893
Engine-ECU has been provided with the following
functions for easier system inspection.FREEZE-FRAME DATA
When the engine-ECU detects a problem and stores
the resulting diagnosis code, the engine condition at
that time is also memorized. The M.U.T.-III can then
be used to analyze this data in order to increase the
effectiveness of troubleshooting. The freeze-frame
data display items are given below.
Item No.DataUnit
12Air flow sensorg/sec
13Intake air temperature sensor°C
21Engine coolant temperature sensor°C
22Crank angle sensorr/min
24Vehicle speed signalkm/h
44Ignition advancedeg
79Throttle position sensor (main)mV
81Long-term fuel compensation%
82Short-term fuel compensation%
87Calculated load value%
88Fuel control conditionOpen loopOL
Closed loopCL
Open loop owing to drive conditionOL-DRV
Open loop owing to system malfunctionOL-SYS
89Fuel control condition−
DIAGNOSIS CODE
The diagnosis and engine warning lamp items are
given in the table below.
Code No.Diagnosis itemMain diagnosis contentsEngine
warning lamp
P0011Variable valve timing systemAbnormal oil passage in variable
valve timing system−
P0090Fuel pressure control solenoid
valve systemOpen circuit or short-circuit in
solenoid valve-related circuitON
P0100Air flow sensor systemOpen circuit or short-circuit in
valve-related circuitsON
P0105Barometric pressure sensor
systemOpen circuit or short-circuit in
sensor-related circuitsON
P0110Intake air temperature sensor
systemOpen circuit or short-circuit in
sensor-related circuitsON
P0115Engine coolant temperature sensor
systemOpen circuit or short-circuit in
sensor-related circuitsON
P0122Throttle position sensor (main)
circuit low inputOpen circuit or short-circuit in
sensor-related circuitsON

DIAGNOSIS SYSTEM
MULTIPOINT FUEL INJECTION (MPI) <4G1>13B-17
DATA LIST FUNCTION
The data list items are given in the table below
P2122Accelerator pedal position sensor
(main) circuit low inputOpen circuit or short-circuit in
sensor-related circuitsON
P2123Accelerator pedal position sensor
(main) circuit high inputOpen circuit in sensor-related
circuitsON
P2127Accelerator pedal position sensor
(sub) circuit low inputOpen circuit or short-circuit in
sensor-related circuitsON
P2128Accelerator pedal position sensor
(sub) circuit high inputOpen circuit in sensor-related
circuitsON
P2135Throttle position sensor (main and
sub) range/performance problemAbnormal sensor outputON
P2138Accelerator pedal position sensor
(main and sub) range/performance
problemAbnormal sensor outputON
U1073Bus offAbnormality in CAN bus line−
U1102ASC-ECU time-outAbnormality in CAN bus line−
U1106EPS-ECU time-outAbnormality in CAN bus line−
U1108Combination meter time-outAbnormality in CAN bus line−
U 111 0A/C-ECU time-outAbnormality in CAN bus line−
Code No. Diagnosis item Main diagnosis contents Engine
warning lamp
Item No.Inspection itemUnit
11Oxygen sensormV
12Air flow sensorg/s
13Intake air temperature sensor°C
14Throttle position sensor (sub)mV
16Power supply voltageV
18Cranking signal (ignition switch-ST)ON/OFF
21Engine coolant temperature sensor°C
22Crank angle sensorr/min
25Barometric pressure sensorkPa
29Inhibitor switchP or N/D, 2, L, or R
37Volumetric efficiency%
41Injectorsms
44Ignition advance°BTDC
49A/C relayON/OFF
67Stop lamp switchON/OFF
77Accelerator pedal position sensor (sub)mV
78Accelerator pedal position sensor (main)mV
79Throttle position sensor (main)mV
7EVariable valve timing phase angle°CA