Mitsubishi Outlander (2013+). Manual — part 35

SENSOR

MULTIPOINT FUEL INJECTION (MPI)

13A-8

INTAKE AIR TEMPERATURE SENSOR

Intake air temperature sensor is built in to the air flow
sensor. Intake air temperature sensor detects intake
air temperature through thermistor's resistance
change and outputs the voltage according to intake
air temperature to engine-ECU. Engine-ECU uses
this output voltage to compensate fuel injection con-
trol and ignition timing control. Sensor properties are
as shown in the figure.

MANIFOLD ABSOLUTE PRESSURE
SENSOR

The manifold absolute pressure sensor is installed in
the inlet manifold. Manifold absolute pressure sensor
uses a piezo resistive semiconductor to output the
voltage according to manifold absolute pressure to
engine-ECU. Engine-ECU uses this output voltage to
compensate fuel injection volume according to mani-
fold absolute pressure. Sensor properties are as
shown in the figure.

AKB00750 AB

Sensory part
(thermistor)

AK602207AN

Resistance (k

)

Output voltage (V)

Intake air temperature
sensor (thermistor)

5V

Intake air
temperature (˚C)

Intake air
temperature (˚C)

Engine-ECU

AKC00061AB

Pressure

Manifold absolute
pressure sensor

SENSOR

MULTIPOINT FUEL INJECTION (MPI)

13A-9

ENGINE COOLANT TEMPERATURE
SENSOR

The engine coolant temperature sensor is installed in
the thermostat housing. Engine coolant temperature
sensor uses thermistor's resistance change to detect
coolant temperature and output the voltage accord-
ing to coolant temperature to engine-ECU.
Engine-ECU uses this output voltage to appropriately
control fuel injection volume, idle speed and ignition
timing when the engine is cold. Sensor properties are
as shown in the figure.

AK602206AF

5V

0

101

5V

Earth

Output voltage (V)

Pressure (kPa)

Manifold absolute
pressure sensor

Power source

Output signal

Engine-ECU

AK602255AB

Sensory part
(thermistor)

AK602208AK

Output voltage (V)

5V

Engine coolant
temperature sensor
(thermistor)

Engine coolant
temperature (˚C)

Engine coolant
temperature (˚C)

Engine-ECU

Resistance (k )

SENSOR

MULTIPOINT FUEL INJECTION (MPI)

13A-10

THROTTLE POSITION SENSOR

The throttle position sensor is installed in the throttle
body. Throttle position sensor outputs voltage to
engine-ECU based on the throttle shaft rotation
angle. Engine-ECU uses this signal to detect the
throttle valve opening angle to perform throttle valve
control servo feedback control. This throttle position
sensor uses Hall IC and is a non-contact type.

STRUCTURE AND SYSTEM

Throttle position sensor is composed of a permanent
magnet fixed on the throttle shaft, Hall IC that outputs
voltage according to magnetic flux density and a sta-
tor that efficiently introduces magnetic flux from the
permanent magnet to Hall IC.
Magnetic flux density at Hall IC is proportional to the
output voltage.
Throttle position sensor has 2 output systems

− throt-

tle position sensor (main) and throttle position sensor
(sub), and the output voltage is output to
engine-ECU. When throttle valve turns, output volt-
age of throttle position sensor (main) and throttle
position sensor (sub) changes. This allows
engine-ECU to detect actual throttle opening angle.
Engine-ECU uses this output voltage for throttle
valve control servo feedback control. The relation-
ship between throttle opening angle and output volt-
age of the throttle position sensor (main) and throttle
position sensor (sub) is as shown in the figure below.

AKC00062AB

Throttle body

Throttle
position
sensor

AK602222AG

5V

5V

Throttle position sensor

Throttle valve opening angle

5

2.5

4.5

0.5

0

Throttle position
sensor (main)

Throttle position
sensor (sub)

Throttle position
sensor (sub)

Throttle position
sensor (main)

Hall IC

Fully
closed

Fully
opened

Hall IC

Output voltage (V)

Engine-ECU

SENSOR

MULTIPOINT FUEL INJECTION (MPI)

13A-11

When abnormality is detected

Engine-ECU compares output voltage of the throttle
position sensor (main) and throttle position sensor
(sub) to check for abnormality in the throttle position
sensor. If the engine-ECU detects the abnormality,
the emergency should be prevented by performing
the fuel-safe control.

• When 1-system malfunctions

The engine ECU should perform the throttle valve

position control by only using the signal hav-
ing no malfunctions. Depressing the accelera-
tor pedal half way can perform the control.
Performing the fuel cut can increase the
engine rotation speed.

• When 2-system malfunctions

The engine ECU should cut the energization of

the throttle valve control servo. At that time,
the spring built in the throttle valve can slightly
open the throttle valve. This allows the engine
ECU to control the engine output.

ACCELERATOR PEDAL POSITION
SENSOR

AKB00593

Throttle
position
sensor

Main

Restrict or shut off
the operating

Main

Sub

Sub

Accelerator
pedal position
sensor

Engine-ECU

Fuel cut

Injector

Throttle valve
control servo

AB

AK602569 AB

Accelerator pedal position
sensor connector

Accelerator pedal arm