fuel MITSUBISHI LANCER EVOLUTION X 2008 Repair Manual

STARTER RELAY CONTROL
MULTIPORT FUEL SYSTEM (MFI)13A-47
STARTER RELAY CONTROLM2132025500092
AK604136
M
AB OFF ON OFF
ON
Engine-ECU
Starter relay
controlClutch
interlock
switch
ETACS
-ECUIgnition switch-STBattery
Starter relay
Starter
OFFON

STARTER RELAY CONTROL
MULTIPORT FUEL SYSTEM (MFI)13A-48
When the ignition switch-ST signal is input, ECM
turns ON the power transistor for control of the
starter relay.
AK604137
M
AB P
DNR
OFF ON OFF
ON
Engine-ECU
Starter relay
controlTransmission
range switch Ignition switch-STBattery
Starter relay
Starter ETACS
-ECU

HEATED OXYGEN SENSOR HEATER CONTROL
MULTIPORT FUEL SYSTEM (MFI)13A-49
HEATED OXYGEN SENSOR HEATER CONTROLM2132007000206
When exhaust gas temperature is low, the heated
oxygen sensor response is dull. So, response is
improved by raising the sensor temperature by pass
-
ing current through the heater at a low exhaust gas
temperature, such as in the immediate aftermath of
the engine start, or during the warm up operation and in cutting the fuel during deceleration. Based on driv
-
ing conditions and the heated oxygen sensor activa-
tion state, ECM changes the amount of current (duty
ratio) to the heater to quicken the activation of the
heated oxygen sensor.
AK602241AD
Battery Heated oxygen sensor heater
Engine coolant
temperature sensor MFI relay
ECM

A/C COMPRESSOR RELAY CONTROL
MULTIPORT FUEL SYSTEM (MFI)13A-50
A/C COMPRESSOR RELAY CONTROLM2132034500120
The ECM turns on the power transistor when the A/C
switch ON signal is input by the A/C-ECU through
the CAN. This allows the A/C compressor relay to be
ON and to be operated. During the high load opera
-
tion, such as the acceleration with the fully opened
accelerator, the ECM secures the acceleration capa
-
bility by turning off the A/C compressor relay for the
specified period to produce no load on the A/C com
-
pressor.
AK604138
OFF
ON
AB
Battery
A/C compressor relay
A/C compressor
assembly
A/C compressor
relay control A/C compressor
clutch
A/C
refrigerant
temperature
switch
OFF ON
A/C switch (CAN)
ECM

GENERATOR CONTROL
MULTIPORT FUEL SYSTEM (MFI)13A-51
GENERATOR CONTROLM2132025000172
During engine idle operation, ECM controls duty of
conduction between generator G terminal and
ground. (G terminal duty is controlled to be the same
as ON duty of the power transistor inside the voltage
regulator). If headlights etc. are turned on while
engine is idling, the consumed current increases
suddenly, but by gradually increasing the generator G terminal OFF duty, ECM restricts sudden increase
in generator's output current and output current is
increased only gradually. (Battery current is supplied
to the headlamp etc. till generator produces sufficient
current.) Thus, ECM prevents change in idle speed
due to sudden increase of engine load.
AK602242 AD
Engine coolant temperature sensor
Generator G terminal
Generator FR terminal
Generator Crankshaft position sensor
A/C switch (CAN)
Ignition switch-STECM

EVAPORATIVE EMISSION CONTROL SYSTEM INCORRECT PURGE FLOW MONITOR
MULTIPORT FUEL SYSTEM (MFI)13A-52
EVAPORATIVE EMISSION CONTROL SYSTEM INCORRECT
PURGE FLOW MONITOR
M2132027200019
The ECM detects whether the fuel vapor leakage
exists or not from the evaporative emission control
system. By the specified pattern within the certain
operation range, the ECM drives the evaporative
emission purge solenoid and the evaporative emis
-
sion ventilation solenoid. This allows slight vacuum
to be produced in the fuel tank.
The ECM measures the vacuum condition through
the fuel tank differential pressure sensor signal. By
comparing the normal (expected) value and the
actual value, the ECM detects whether the fuel vapor
leakage exists or not from the evaporative emission
control system.
AK604139
Evaporative emission
purge solenoid
Evaporative emission
ventilation solenoid
Fuel tank differential pressure sensor
Fuel tank temperature sensor
AB
BatteryMFI relay
ECM Mass airflow sensor
Barometric pressure sensor
Intake air temperature sensor
Engine coolant
temperature sensor
Fuel level sensor (CAN)Fuel
tank
Fuel level
sensor To injector