2004 MITSUBISHI LANCER EVOLUTION VIII radiator

ENGINE (4G6) – GENERAL, BASE ENGINE (6 M/T)18
Control system (6M/T)
The following changes have been made, based on the control system in the 4G63DOHCT/C engine fitted in the current
Lancer Evolution VIII.
* Addition of wastegate solenoid valve (1 valve –> 2 valves)
System Block Diagram
Air flow sensor (AFS)
Air temperature sensor
Atmospheric pressure sensor
Water temperature sensor
Throttle position sensor (TPS)
A/C switch
A/C load signal
Cam position sensor
Crank angle sensor
Alternator FR terminal
Vehicle speed sensor
Power steering fluid pressure
switch
Knock sensor
Intercooler water spray (auto)
Intercooler water spray (manual)
O
2sensor
Ignition switch –IG
Ignition switch –STPower supplyEngine ECU
Fuel injection control
Idle speed control (ISC)
Ignition timing control
Engine control relay control
Fuel pump relay control
A/C relay control
Fan motor control (radiator)
Fan relay control (A/C
condenser)
Alternator control
Air flow sensor filter reset
control
Fuel pressure control
Supercharging pressure
control
Secondary air controlIntercooler water spay control
Engine warning light control
O
2sensor heater control
Purge control
Diagnosis output
RAM data transmissionNo. 1 indicator
No. 2 indicator
No. 3 indicatorNo. 4 indicator
ISC servo (stepper motor)
Ignition coil A (No.1 – No.4)
Ignition coil B (No.2 – No.3)
Engine control relay
Fuel pump relay 2
Fuel pump relay 3
A/C relay
Fan controller (radiator fan)
Fan motor relay (HI, LOW)
(A/C condenser)
Alternator G terminal
Air flow sensor
Fuel pressure control valve
No. 1 wastegate solenoid valve
No. 2 wastegate solenoid valve
Secondary air control solenoid
valve
Intercooler water spray relay
Intercooler water spray lamp
Tachometer
Engine warning lights O
2sensor heater
Purge control solenoid valve
Diagnosis output terminal
Diagnosis output terminal (for
MUTII)

CIRCUIT DIAGRAMS - CENTRAL JUNCTION3-9
Fusible link (Relay box inside engine space)
Power supply circuitFuse No.Rated
current (A)ID
colourApplied loads
Battery / Alternator (fusible
link No. 6)320YellowO2sensor, secondary are
control solenoid valve, idle
speed control servo, ignition
coil 1, ignition coil 2, waste
gate solenoid valve 1, waste
gate solenoid valve 2, air
flow sensor, engine ECU,
engine control relay, cam
position sensor, crank angle
sensor, purge control
solenoid valve, fuel pressure
solenoid valve, radiator fan
control relay, register (for
injector)
1020YellowFuel pump relay 3, fuel pump
register, fuel pump & fuel
gauge unit (main)
Forward
direction of
vehicle

CIRCUIT DIAGRAMS - AIR CONDITIONING3-28
Manual Air Conditioning (cont’d)
Fusible link2Engine control relay
Radiator fan
control relay
Radiator fan controller
Input signal
processor
Temperature
detection
Drive circuit
Current
detection
Equalizing
circuit
Field effect
transistor circuit
Radiator fan
motor

CIRCUIT DIAGRAMS - AIR CONDITIONING3-30
Manual Air Conditioning (cont’d)
Battery
J/C(2)
(General fuse)5Radiator fan
controller
A/C
compressor
relay
General fuse
A/C
compressor
Cooling
temperature
switch
Magnetic
switch
Dual
pressure
switchLow pressure side
ON
OFF
: 196kPa
OFF
ON
: 221kPa
High pressure side
ON
OFF
: 3138kPa
OFF
ON
: 2550kPa
Engine ECU