MITSUBISHI LANCER 2005 Workshop Manual
Page 671 of 788
ENGINE CONTROL SYSTEM <4G1-A/T (LHD)>
CIRCUIT DIAGRAMS90-33
ENGINE CONTROL SYSTEM <4G1-A/T (LHD)>
M1901000802323
IGNITION
SWITCH (IG1)
ENGINE- 
A/T-ECUFUEL 
PUMP 
RELAY 
(1)FUEL 
PUMP 
RELAY 
(2)
COMBINATION 
METERBATTERY FUSIBLE 
LINK1
RELAY 
BOX
FUEL 
TANK
PUMP
NOTE
: SEDAN 
: WAGON
IGNITION
SWITCH (ST)
STARTING 
SYSTEM ·COOLING
 SYSTEM
·MANUAL AIR
 CONDITIONER
ENGINE 
CONTROL 
RELAY
POWER 
SOURCE
BACK-UP 
POWER SOURCE
INHIBITOR 
SWITCH 
Page 672 of 788
ENGINE CONTROL SYSTEM <4G1-A/T (LHD)>
CIRCUIT DIAGRAMS90-34
ENGINE CONTROL SYSTEM <4G1-A/T (LHD)> (CONTINUED)
ENGINE CONTROL SYSTEM <4G1-A/T (LHD)>  (CONTINUED)
ENGINE CONTROL 
RELAY
ENGINE-
A/T-ECU
ENGINE CONTROL
OXYGEN SENSOR 
(REAR)OUTPUT
GNDPOWER 
SOURCE
INTAKE AIR 
TEMPERATURE 
SENSOR
Wire colour code
B : Black     LG : Light green     G : Green     L : Blue     W : White     Y : Yellow     SB : Sky blue
BR : Brown     O : Orange     GR : Grey     R : Red     P : Pink     V : Violet   
CAMSHAFT 
POSITION 
SENSOR EMISSION 
SOLENOID 
VALVE 
(PURGE
 CONTROL
 SYSTEM)EMISSION 
SOLENOID 
VALVE 
(EGR
 SYSTEM)ENGINE 
CRANK
ANGLE 
SENSOR
WATER 
TEMPERA-
TURE 
SENSOR 
UNITTHROTTLE 
BODY
THROTTLE 
SENSOR
FUEL
INJECTOR 1FUEL
INJECTOR 2FUEL
INJECTOR 3FUEL
INJECTOR 4
ENGINE
CONTROL 
OXYGEN 
SENSOR 
(FRONT)
INLET MANIFOLD 
ABSOLUTE PRESSURE SENSOR
CHARGING 
SYSTEMMANUAL AIR 
CONDITIONER
·MANUAL AIR
 CONDITIONER ·COOLING
 SYSTEMTHROTTLE
BODY IDLE 
SPEED
CONTROL 
SERVO
ENGINE-A/T-ECU
ENGINE CONTROL
DETONATION 
SENSOR
IMMOBILIZER 
SYSTEMIGNITION 
SYSTEM
FRONT 
SIDE
FRONT 
SIDE
ENGINE-A/T-
ECU
(FUSE     )
3 
(FUSE     )15
DIAGNOSIS 
CONNECTOR
DIAGNOSIS 
CONNECTOR ENGINE 
SPEED 
DETECTION 
CONNECTOR OUTPUT SHAFT 
SPEED SENSOR A/T 
CONTROL 
RELAY
INVECS-II 
4A/T INVECS-II 
4A/T
Wire colour code
B : Black     LG : Light green     G : Green     L : Blue     W : White     Y : Yellow     SB : Sky blue
BR : Brown     O : Orange     GR : Grey     R : Red     P : Pink     V : Violet   
POWER 
STEERING 
FLUID 
PRESSURE 
SWITCH 
Page 673 of 788
ENGINE CONTROL SYSTEM <4G1-A/T (RHD)>
CIRCUIT DIAGRAMS90-35
ENGINE CONTROL SYSTEM <4G1-A/T (RHD)>
M1901000802334
IGNITION
SWITCH (ST)
STARTING 
SYSTEM ·COOLING
 SYSTEM
·MANUAL AIR
 CONDITIONER
POWER 
SOURCEBACK-UP 
POWER SOURCEINHIBITOR 
SWITCH ENGINE 
CONTROL 
RELAY
·IGNITION
 SYSTEM
·IMMOBILIZER
 SYSTEM
NOTE
: SEDAN 
: WAGON
·FRONT FOG LAMP
·HEADLAMP : 
·TAIL LAMP, POSITION LAMP,
 LICENCE PLATE LAMP AND
 LIGHTING MONITOR BUZZER
·TURN-SIGNAL LAMP
 AND HAZARD WARNING LAMP
·WINDSHIELD
 WIPER AND WASHER ·REAR FOG LAMP
·REAR WIPER AND WASHERIGNITION
SWITCH (IG1)
ENGINE- 
A/T-ECUFUEL 
PUMP 
RELAY 
(1)FUEL 
PUMP 
RELAY 
(2)
COMBINATION 
METERBATTERY FUSIBLE 
LINK1
FUEL 
TANK PUMP
RELAY 
BOX 
Page 674 of 788
ENGINE CONTROL SYSTEM <4G1-A/T (RHD)>
CIRCUIT DIAGRAMS90-36
ENGINE CONTROL SYSTEM <4G1-M/T (RHD)> (CONTINUED)
ENGINE CONTROL SYSTEM <4G1-A/T (RHD)> (CONTINUED)
CAMSHAFT 
POSITION 
SENSOR
OUTPUT
GNDPOWER 
SOURCE
INTAKE AIR 
TEMPERATURE 
SENSOREMISSION 
SOLENOID 
VALVE 
(PURGE
 CONTROL
 SYSTEM)EMISSION 
SOLENOID 
VALVE 
(EGR
 SYSTEM)ENGINE 
CRANK
ANGLE 
SENSOR
INLET MANIFOLD 
ABSOLUTE PRESSURE SENSORWATER 
TEMPERA-
TURE 
SENSOR 
UNITTHROTTLE 
BODY
THROTTLE 
SENSOR ENGINE CONTROL 
RELAY
FUEL
INJECTOR 1FUEL
INJECTOR 2FUEL
INJECTOR 3FUEL
INJECTOR 4
ENGINE-
A/T-ECU
ENGINE CONTROL
OXYGEN SENSOR 
(REAR)ENGINE 
CONTROL
OXYGEN 
SENSOR 
(FRONT)
Wire colour code
B : Black     LG : Light green     G : Green     L : Blue     W : White     Y : Yellow     SB : Sky blue
BR : Brown     O : Orange     GR : Grey     R : Red     P : Pink     V : Violet   
ENGINE-A/T-
ECU
(FUSE     )
(FUSE     )
DIAGNOSIS 
CONNECTOR
DIAGNOSIS 
CONNECTOR
POWER 
STEERING 
FLUID PRESSURE 
SWITCHENGINE 
SPEED 
DETECTION 
CONNECTOR
Wire colour code
B : Black     LG : Light green     G : Green     L : Blue     W : White     Y : Yellow     SB : Sky blue
BR : Brown     O : Orange     GR : Grey     R : Red     P : Pink     V : Violet    OUTPUT SHAFT 
SPEED SENSOR A/T 
CONTROL 
RELAY
INVECS-II 
4A/T INVECS-II 
4A/T
3 
15
CHARGING 
SYSTEMMANUAL AIR 
CONDITIONER
·MANUAL AIR
 CONDITIONER ·COOLING
 SYSTEMTHROTTLE 
BODY
IDLE SPEED 
CONTROL
SERVO
ENGINE-A/T-ECU
ENGINE CONTROL
DETONATION 
SENSOR
IMMOBILIZER 
SYSTEMIGNITION 
SYSTEM
FRONT 
SIDEFRONT 
SIDE 
Page 675 of 788
ENGINE CONTROL SYSTEM <4G6 (LHD)>
CIRCUIT DIAGRAMS90-37
ENGINE CONTROL SYSTEM <4G6 (LHD)>
M1901000802345
IGNITION
SWITCH (ST)
STARTING 
SYSTEM
·COOLING
 SYSTEM
·MANUAL AIR
 CONDITIONER
ENGINE 
CONTROL 
RELAY
POWER 
SOURCE
Wire colour code
B : Black     LG : Light green     G : Green     L : Blue      
W : White     Y : Yellow     SB : Sky blue     BR : Brown 
O : Orange     GR : Grey     R : Red     P : Pink     V : Violet        BACK-UP 
POWER SOURCE IGNITION
SWITCH (IG1)
ENGINE-
ECUFUEL 
PUMP 
RELAY 
(1)FUEL 
PUMP 
RELAY 
(2)
COMBINATION 
METERBATTERY FUSIBLE 
LINK
1
RELAY 
BOX
FUEL 
TANK
PUMP
NOTE: SEDAN
: WAGON 
Page 676 of 788
ENGINE CONTROL SYSTEM <4G6 (LHD)>
CIRCUIT DIAGRAMS90-38
ENGINE CONTROL SYSTEM <4G6 (LHD)> (CONTINUED)
ENGINE CONTROL SYSTEM <4G6 (LHD)> (CONTINUED)
WATER 
TEMPERA-
TURE 
SENSORTHROTTLE 
BODY
THROTTLE 
SENSOR EMISSION
SOLENOID
VALVE
(PURGE 
CONTROL 
SYSTEM)EMISSION
SOLENOID
VALVE
(EGR 
SYSTEM)CAMSHAFT 
POSITION 
SENSORENGINE
CRANK 
ANGLE 
SENSOR
Wire colour code
B : Black     LG : Light green     G : Green     L : Blue     W : White     Y : Yellow     SB : Sky blue
BR : Brown     O : Orange     GR : Grey     R : Red     P : Pink     V : Violet    AIR CLEANER
AIR FLOW SENSORINTAKE AIR 
TEMPERATURE 
SEMSORAIR 
FLOW 
SENSOR BAROMETRIC 
PRESSURE 
SENSOR
ENGINE CONTROL 
RELAY
FUEL
INJECTOR 1FUEL
INJECTOR 2FUEL
INJECTOR 3FUEL
INJECTOR 4
ENGINE-
ECU
ENGINE 
CONTROL
OXYGEN 
SENSOR 
(REAR)ENGINE
CONTROL
OXYGEN 
SENSOR 
(FRONT)
ENGINE-
ECU
(FUSE     )2
(FUSE     )15
DIAGNOSIS 
CONNECTOR
DIAGNOSIS 
CONNECTOR
POWER 
STEERING 
FLUID PRESSURE 
SWITCHENGINE 
SPEED 
DETECTION 
CONNECTOR VEHICLE 
SPEED 
SENSOR
METER AND 
GAUGE
Wire colour code
B : Black     LG : Light green     G : Green     L : Blue     W : White     Y : Yellow     SB : Sky blue
BR : Brown     O : Orange     GR : Grey     R : Red     P : Pink     V : Violet   
CHARGING 
SYSTEMMANUAL AIR 
CONDITIONER
·MANUAL AIR
 CONDITIONER ·COOLING
 SYSTEMTHROTTLE
BODY
IDLE SOEED
CONTROL
SERVO
ENGINE-ECU
ENGINE CONTROL
DETONATION 
SENSOR
IMMOBILIZER 
SYSTEMIGNITION 
SYSTEM
FRONT 
SIDE 
Page 677 of 788
ENGINE CONTROL SYSTEM <4G6 (RHD)>
CIRCUIT DIAGRAMS90-39
ENGINE CONTROL SYSTEM <4G6 (RHD)>
M1901000802356
NOTE
·FRONT FOG LAMP
·HEADLAMP : 
·TAIL LAMP, POSITION LAMP,
 LICENCE PLATE LAMP AND
 LIGHTING MONITOR BUZZER
·TURN-SIGNAL LAMP
 AND HAZARD WARNING LAMP
·WINDSHIELD
 WIPER AND WASHER ·REAR FOG LAMP
·REAR WIPER AND WASHERIGNITION
SWITCH (ST)
STARTING 
SYSTEM
·COOLING
 SYSTEM
·MANUAL AIR
 CONDITIONER
ENGINE 
CONTROL 
RELAY
POWER 
SOURCE
Wire colour code
B : Black     LG : Light green     G : Green     L : Blue      
W : White     Y : Yellow     SB : Sky blue     BR : Brown 
O : Orange     GR : Grey     R : Red     P : Pink     V : Violet        BACK-UP 
POWER SOURCE
IGNITION 
SYSTEM
IGNITION
SWITCH (IG1)
ENGINE-ECUFUEL 
PUMP 
RELAY 
(1)FUEL 
PUMP 
RELAY 
(2)
COMBINATION 
METERBATTERY FUSIBLE 
LINK1
RELAY 
BOX
FUEL
TANK 
PUMP 
Page 678 of 788
ENGINE CONTROL SYSTEM <4G6 (RHD)>
CIRCUIT DIAGRAMS90-40
ENGINE CONTROL SYSTEM <4G6 (RHD)> (CONTINUED)
ENGINE CONTROL SYSTEM <4G6 (RHD)> (CONTINUED)
WATER 
TEMPERA-
TURE 
SENSORTHROTTLE 
BODY
THROTTLE 
SENSOR EMISSION
SOLENOID
VALVE
(PURGE 
CONTROL 
SYSTEM)EMISSION 
SOLENOID
VALVE
(EGR 
SYSTEM)CAMSHAFT 
POSITION 
SENSORENGINE
CRANK 
ANGLE 
SENSOR
Wire colour code
B : Black     LG : Light green     G : Green     L : Blue     W : White     Y : Yellow     SB : Sky blue
BR : Brown     O : Orange     GR : Grey     R : Red     P : Pink     V : Violet   INTAKE AIR 
TEMPERATURE 
SEMSORAIR 
FLOW 
SENSOR BAROMETRIC 
PRESSURE 
SENSOR
AIR CLEANER
AIR FLOW SENSOR ENGINE CONTROL 
RELAY
FUEL
INJECTOR 1FUEL
INJECTOR 2FUEL
INJECTOR 3FUEL
INJECTOR 4
ENGINE-
ECU
ENGINE CONTROL
OXYGEN SENSOR 
(REAR)ENGINE 
CONTROL
OXYGEN 
SENSOR 
(FRONT)
ENGINE-
ECU
(FUSE     )2
(FUSE     )15
DIAGNOSIS 
CONNECTOR
DIAGNOSIS 
CONNECTOR
POWER 
STEERING 
FLUID PRESSURE 
SWITCHENGINE 
SPEED 
DETECTION 
CONNECTOR VEHICLE 
SPEED 
SENSOR
METER AND 
GAUGE
Wire colour code
B : Black     LG : Light green     G : Green     L : Blue     W : White     Y : Yellow     SB : Sky blue
BR : Brown     O : Orange     GR : Grey     R : Red     P : Pink     V : Violet   
CHARGING 
SYSTEMMANUAL AIR 
CONDITIONER
·MANUAL AIR
 CONDITIONER ·COOLING
 SYSTEMTHROTTLE 
BODY 
IDLE SPEED 
CONTROL 
SERVO
ENGINE-ECU
ENGINE CONTROL 
DETONATION 
SENSOR
IMMOBILIZER 
SYSTEMIGNITION 
SYSTEM
FRONT 
SIDEFRONT 
SIDE 
Page 679 of 788
COOLING SYSTEM <LHD>
CIRCUIT DIAGRAMS90-41
COOLING SYSTEM <LHD>
M1901001000904
FUSIBLE 
LINK2
ENGINE 
CONTROL 
RELAY
ENGINE-
ECU <M/T>
ENGINE-
A/T-ECU <A/T>
<M/T>
<A/T>
FAN 
CONTROL 
RELAY
RADIATOR 
FAN MOTOR CONDENSER 
FAN MOTOR COOLING FAN MOTOR 
DRIVE CONTROL UNITINPUT SIGNAL
·A/C SWITCH
·WATER
 TEMPERATURE
 SENSOR UNIT ·OUTPUT SHAFT
 SPEED SENSOR
 <A/T>·VEHICLE SPEED
 SENSOR <M/T>
SMOOTHING 
CIRCUIT
INPUT 
SIGNAL 
PROCESSING
DRIVE 
CIRCUITFIELD EFFECT 
TRANSISTOR 
CIRCUIT
TEMPERATURE 
DETECTIONCURRENT 
DETECTION
Wire colour code
B : Black     LG : Light green     G : Green     L : Blue      
W : White     Y : Yellow     SB : Sky blue     BR : Brown 
O : Orange     GR : Grey     R : Red     P : Pink     V : Violet        
ENGINE 
CONTROL 
SYSTEM 
Page 680 of 788
COOLING SYSTEM <RHD>
CIRCUIT DIAGRAMS90-42
COOLING SYSTEM <RHD>
M1901001000915
FUSIBLE 
LINK2
ENGINE 
CONTROL 
RELAY
ENGINE-
ECU <M/T>
ENGINE-
A/T-ECU <A/T>
<M/T>
<A/T>
FAN CONTROL 
RELAY
RADIATOR 
FAN MOTOR CONDENSER 
FAN MOTOR COOLING FAN MOTOR
DRIVE CONTROL UNITINPUT SIGNAL
·A/C SWITCH
·WATER 
 TEMPERATURE
 SENSOR UNIT·OUTPUT SHAFT
 SPEED SENSOR <A/T>
·VEHICLE SPEED
 SENSOR <M/T>
SMOOTHING 
CIRCUIT
INPUT 
SIGNAL 
PROCESSING
DRIVE 
CIRCUIT
TEMPERATURE 
DETECTIONCURRENT 
DETECTION
ENGINE 
CONTROL 
SYSTEM
Wire colour code
B : Black     LG : Light green     G : Green     L : Blue     W : White     Y : Yellow     SB : Sky blue
BR : Brown     O : Orange     GR : Grey     R : Red     P : Pink     V : Violet   FIELD EFFECT 
TRANSISTOR 
CIRCUIT