Control System; General Information - Mitsubishi Eclipse Technical Information Manual

CONTROL SYSTEM

GENERAL INFORMATION

The fuel system for the 2.0 liter DOHC engine utilizes
sequential multi-port fuel injection to deliver precise
amounts of fuel to the intake manifold.
Basic injector duration is controlled by a combination
of signals from the front oxygen sensor and an air
density signal from a MAP sensor.
This vehicle uses a direct ignition system, eliminating
the need for a distributor. Ignition and fuel injector
Major differences from the 1994 4G63 2.0 liter DOHC engine are as follows:
Major difference
Fast idle air valve is not equipped.
Closed throttle position switch is not equipped.
Speed adjusting screw is not equipped.
Fixed SAS is fixed at the production line.
Throttle position sensor is fixed to the throttle body at
the production line.
Camshaft position sensor waveform is different from the
current one.
Crankshaft position sensor waveform and its detection
method are different from those current ones.
On vehicles with automatic transaxle, vehicle speed
sensor signal is input from TCM.
Ignition switch-ST (cranking) signal input is not pro-
vided .
MFI relay (ASD relay) and fuel pump relay are separate-
Generator generating voltage is controlled by PCM.
Tachometer is controlled by PCM.
Charging system indicator lamp is controlled by PCM.
Control of the indicator/warning lamps (just after turning
ON the ignition switch) is performed by PCM.
Pulsed secondary air injection is controlled by PCM.
Data transmission system between PCM and TCM is
different from the current one.
Battery temperature sensor is built in PCM.
mounted in the engine compartment.
PCM is
ENGINE <NON-TURBO> - Control System
operation are controlled by a new power-train control
module (PCM) which reviews inputs from a number
of sensors. The PCM provides outputs to fuel and
ignition system components to promote the most
efficient operation possible. The vehicle includes
a catalytic converter and sophisticated emissions
system diagnostic process (OBD II) to ensure that
emissions meet clean air regulations.
Remarks
On Mitsubishi manufactured engines, a fast idle air valve
is equipped in the throttle body.
Basic idle speed is not adjustable.
Fixed SAS is not equipped.
Throttle position sensor is not adjustable.
A hall effect sensor is used, however, the construction of
the sensor is different.
A same Hall effect sensor is used, however, the
construction of the sensor is different.
PCM judges as engine cranking when the engine speed
is low.
Currently, these two are combined into one relay.
Currently, it is controlled by the voltage regulator built in
the generator.