ECU MITSUBISHI COLT 2006 Service Owner's Guide

IGNITION TIMING AND DISTRIBUTION CONTROL
MULTIPOINT FUEL INJECTION (MPI) <4A9>13A-11
IGNITION TIMING AND DISTRIBUTION CONTROL
M2132005000750
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
Manifold absolute
pressure sensor
Intake air temperature sensor
Barometric pressure sensor
Engine coolant
temperature sensor
Camshaft position sensor
Crank angle sensor
Detonation sensor
Ignition switch-ST
Engine-ECU
or Engine-
CVT-ECU
AG
OTHER CONTROL FUNCTI O NS
M21320100 0059 6
The following co ntrols are b a sically t he sa me a s
those
of the 4G1 - No n
−turbo eng ine u s ed in the
CO
L
T
.
•ENGINE CONTROL RELA Y CONTROL
•THROTTLE VA L V E C O NTROL SER VO R E LA Y
CONTROL
•MIVEC (Mitsub i sh i Inno vative V a lve T i ming Elec-
tronic Con t rol System)
•FUEL PUMP RELA Y CONTROL
•OXYGEN S E NSOR HEA T E R CONTR O L
•A/C RELAY CONTROL
•ALTER N A T OR CONTROL

FAN RELAY CONTROL
MULTIPOINT FUEL INJECTION (MPI) <4A9>13A-12
FAN RELAY CONTROL
M2132026400117
M
AK402032
OFFON ON
OFF
Engine coolant temperature sensor
Accelerator pedal position sensor Crank angle sensor
Engine-ECU or
Engine-CVT-ECU
Battery
Ignition
switch-IG
Cooling fan
control relay
Cooling fan
control relay A/C switch
AD
A/C switchVehicle speedEngine coolant
temperaturePower transistorFan operation
OFF80 km/h or lessApproximately 96°C
or moreONRotated
Approximately 96°C
or lessOFFStopped
80 km/h or moreApproximately
105
°C or more
ONRotated
Approximately
105
°C or less
OFFStopped
ON−−ONRotated

CONTROLLER AREA NETWORK (CAN)
MULTIPOINT FUEL INJECTION (MPI) <4A9>13A-13
CONTROLLER AREA NETWORK (CAN)
M2132019000292
Establishing communication without fail is designed
by CAN communication protocol. Refer to Group
54C-CAN
P.54C-2 for the details about CAN.
The signals input into engine-ECU or
engine-CVT-ECU are as follows:
CAN Communication Input Signal Table
Input signal nameTransmitter ECU
Motor electric current signalEPS-ECU
Compressor signalMeter and A/C-ECU
Idle-up request signal
Cooling fan request signal
SYSTEM CONFIGURATION DIAGRAM
AK600527AB
Engine-ECU
or
Engine-CVT
-ECU
M.U.T.-III
EPS-ECU ETACS
-ECU
Steering
wheel
sensor G and
yaw rate
sensor
ABS-ECU
CAN_H
CAN_L Diagnosis
connector Combination
meter
(incorporating
meter-A/C-ECU)
: Shows sub bus line. : Shows main bus line. Terminal resistor
Terminal resistor
Main bus lines

DIAGNOSIS SYSTEM
MULTIPOINT FUEL INJECTION (MPI) <4A9>13A-14
DIAGNOSIS SYSTEM
M2132009000882
Engine-ECU or engine-CVT-ECU has
been provided with the following functions for easier
system inspection.FREEZE-FRAME DATA
When the engine-ECU or engine-CVT-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 effective
-
ness of troubleshooting. The freeze-frame data dis-
play items are given below.
Item No.DataUnit
13Intake air temperature sensor°C
21Engine coolant temperature sensor°C
22Crank angle sensorr/min
24Vehicle speed sensorkm/h
32Manifold absolute pressure sensorkPa
44Ignition advancedeg
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
Closed loop based on one oxygen sensorCL-HO2S
8AThrottle position sensor (main)%
A1Oxygen sensor (front)V
A2Oxygen sensor (rear)V
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 MIVEC system−
P0105Manifold absolute 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
P0122*Throttle position sensor (main)
circuit low inputOpen circuit or short-circuit in
sensor-related circuitsON
P0123*Throttle position sensor (main)
circuit high inputShort-circuit in sensor-related
circuitsON

DIAGNOSIS SYSTEM
MULTIPOINT FUEL INJECTION (MPI) <4A9>13A-15
P0125*Feedback system monitorOxygen sensor not operatingON
P0130Oxygen sensor (front) systemOpen circuit or short-circuit in
sensor-related circuitsON
P0135Oxygen sensor (front) heater
systemOpen circuit or short-circuit in
heater-related circuitsON
P0136Oxygen sensor (rear) systemOpen circuit or short-circuit in
sensor-related circuitsON
P0141Oxygen sensor (rear) heater
systemOpen circuit or short-circuit in
heater-related circuitsON
P0170Abnormal fuel systemLeanness or richness problemON
P0201No.1 injector systemOpen circuit or short-circuit in
injector-related circuitsON
P0202No.2 injector systemOpen circuit or short-circuit in
injector-related circuitsON
P0203No.3 injector systemOpen circuit or short-circuit in
injector-related circuitsON
P0204No.4 injector systemOpen circuit or short-circuit in
injector-related circuitsON
P0222*Throttle position sensor (sub)
circuit low inputOpen circuit or short-circuit in
sensor-related circuitsON
P0223*Throttle position sensor (sub)
circuit high inputOpen circuit in sensor-related
circuitsON
P0300*Random/multiple cylinder misfire
detectedMisfiringON
P0301*No.1 cylinder misfire detectedMisfiringON
P0302*No.2 cylinder misfire detectedMisfiringON
P0303*No.3 cylinder misfire detectedMisfiringON
P0304*No.4 cylinder misfire detectedMisfiringON
P0325Detonation sensor systemAbnormal sensor outputON
P0335Crank angle sensor systemAbnormal sensor outputON
P0340Camshaft position sensor systemAbnormal sensor outputON
P0403 Exhaust gas recirculation control
systemOpen circuit or short-circuit in
valve-related circuitsON
P0421Warm up catalyst malfunctionAbnormal exhaust gas purification
performance of catalystON
P0443Purge control solenoid valve
systemOpen circuit or short-circuit in
solenoid valve-related circuitsON
P0500 Vehicle speed sensor systemOpen circuit or short-circuit in
sensor-related circuitsON
P0513Immobilizer malfunctionOpen circuit or short-circuit in
sensor-related circuits−
P0603EEP ROM malfunctionAbnormality in engine-ECU
or engine-CVT-ECU −
Code No. Diagnosis item Main diagnosis contents Engine
warning lamp

DIAGNOSIS SYSTEM
MULTIPOINT FUEL INJECTION (MPI) <4A9>13A-16
P0606Microcomputer malfunctionAbnormality in engine-ECU
or engine-CVT-ECU ON
P0622Alternator FR terminal systemOpen circuit or short-circuit in
system-related circuits−
P0638*Throttle valve control servo circuit
range/performance problemAbnormal throttle valve control
servoON
P0642*Throttle position sensor power
supplyAbnormality in engine-ECU
or engine-CVT-ECU ON
P0657*Throttle valve control servo relay
circuit malfunctionOpen circuit or short-circuit in
sensor-related circuitsON
P1021Oil feeder control valve systemOpen circuit or short-circuit in
solenoid valve-related circuitsON
P1602*Communication malfunction
(between engine-ECU or
engine-CVT-ECU main
processor and system LSI)Abnormality in engine-ECU
or engine-CVT-ECU ON
P1603*Battery backup circuit malfunctionOpen circuit or short-circuit in
system-related circuitsON
P2100*Throttle valve control servo circuit
(open)Open circuit in throttle valve control
servo-related circuitON
P2101*Throttle valve control servo
magneto malfunctionShort-circuit in system-related
circuitsON
P2108*Throttle valve control servo
processor malfunctionAbnormality in engine-ECU
or engine-CVT-ECU ON
P2122*Accelerator pedal position sensor
(main) circuit low inputOpen circuit or short-circuit in
sensor-related circuitsON
P2123*Accelerator pedal position sensor
(main) circuit high inputOpen circuit in sensor-related
circuitsON
P2127*Accelerator pedal position sensor
(sub) circuit low inputOpen circuit or short-circuit in
sensor-related circuitsON
P2128*Accelerator pedal position sensor
(sub) circuit high inputOpen circuit in sensor-related
circuitsON
P2135*Throttle position sensor (main and
sub) range/performance problemAbnormal sensor outputON
P2138*Accelerator pedal position sensor
(main and sub) range/performance
problemAbnormal sensor outputON
P2226Barometric pressure sensor
systemAbnormality in engine-ECU
or engine-CVT-ECU ON
U1073Bus offAbnormality in CAN bus line−
U1102ABS-ECU time-outAbnormality in CAN bus line−
U1106EPS-ECU time-outAbnormality in CAN bus line−
U1108Combination meter time-outAbnormality in CAN bus lineON
U 111 0A/C-ECU time-outAbnormality in CAN bus line−
Code No. Diagnosis item Main diagnosis contents Engine
warning lamp

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-2
GENERAL INFORMATION
M2132000101001
Although the control systems are basically the same
as those of the 4G1-Non-Turbo engine used in the
COLT, the following improvements have been added.
ImprovementRemark
A heat-sensing type air flow sensor
is used.•Changed to the intake air flow me asurement system by the air flow
sensor.
•The sensor is basically the same as that of the 4G69-MPI engine
used in the GRANDIS.
Supercharging pressure control
system is used.Controls the boost pressure that affects the waste gate actuator in
response to the signals from the engine-ECU.
Fuel pressure control solenoid valve
is used.Idling stability immediately afte r restarting the engine at high
temperature is maintained.
Dual oxygen sensor is used.Higher reliability of air-fuel ratio control.
Clutch switch is used.The information about whether the clutch pedal is depressed or not is
input into the engine-ECU.

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