List Of Component Functions - Mitsubishi LANCER EVOLUTION-VII 2001 Technical Information Manual

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LIST OF COMPONENT FUNCTIONS

Name
ECU Engine-ECU
Sensors Ignition switch-IG
Ignition switch-ST
Air flow sensor
Barometric pressure sensor
Oxygen sensor
Intake air temperature sensor
Engine coolant temperature
sensor
Throttle position sensor
Vehicle speed sensor
Camshaft position sensor
Crank angle sensor
Alternator FR terminal
Power steering fluid pressure
switch
A/C switch
ENGINE -
Control System
Function
Uses the signals input from the various sensors to control operation of
actuators in accordance with the driving conditions.
Detects the ON/OFF position of the ignition switch. When this signal
is input to the engine-ECU, power is supplied to components such as
the injectors, air flow sensor, idle speed control servo and crank angle
sensor.
Detects whether the engine is cranking. The engine-ECU controls the
fuel injection, throttle valve opening angle and ignition timing to the
appropriate settings based on this signal.
Detects the amount of intake air (volumetric capacity) by means of a
Karman vortex meter. The engine-ECU controls the basic injector drive
time based on this signal and on the engine speed.
Detects the barometric pressure by means of a semiconductor
diffusion-type pressure sensor. The engine-ECU detects the vehicle's
altitude based on this signal, and uses this to correct the fuel injection
amount so that the optimum air/fuel mixture ratio is obtained for that
altitude.
Detects the concentration of oxygen in the exhaust gas by means of
zirconia and platinum electrodes. The engine-ECU judges whether the
air/fuel mixture ratio is at the optimum theoretical ratio based on this
concentration.
Detects the temperature of the intake air by means of a thermistor. The
engine-ECU corrects the fuel injection amount to the correct amount
corresponding to the intake air temperature based on the voltage
output from this sensor.
Detects the temperature of the engine coolant by means of a
thermistor. The engine-ECU detects how warm the engine is based on
the signal from this sensor, and uses this to control the fuel injection
amount, idle speed and ignition timing.
Detects the throttle valve opening angle by means of a potentiometer.
The engine-ECU controls the throttle valve and also determines the
optimum fuel injection for the vehicle's degree of acceleration based
on the voltage output from this sensor.
Detects the vehicle speed by means of a magnetic rheostatic element.
Detects the No. 1 cylinder compression top dead centre position by
means of a hall element.
Detects the crank angle by means of a hall element. The engine-ECU
controls the injectors based on the signal from this sensor.
Detects the energising duty ratio of the alternator field coil.
Detects whether there is a power steering load present by means of a
contact switch.
Detects the ON/OFF condition of the A/C.