Content .. 635 636 637 638 ..

Mitsubishi 380. Manual - part 637

MULTIPORT FUEL INJECTION (MPI) DIAGNOSIS

MULTIPORT FUEL INJECTION (MPI) <3.8L ENGINE>

13A-640

Injectors*

• Engine

coolant
temperature
: 80

− 95°C

(176

−

203

°F)

• All

accessories
: "OFF"

• Transaxle:

"P" range

Engine is idling 1 - 2 ms

P0201,
P0202,
P0203,
P0204,
P0205,
P0206

P.13A-272
P.13A-280
P.13A-287
P.13A-295
P.13A-302
P.13A-310

2,500 r/min

1 - 3 ms

When engine
is suddenly
revved

1 - 4 ms

A/C pressure
sensor

• Engine: running

• A/C switch: "ON"

1275

− 1863 kPa

Procedure
No. 28

P.13A-634

Long-term fuel
trim bank 1

N/A

Long-term fuel
trim bank 2

N/A

Short-term fuel
trim bank 1

Engine: warming up, 2,500
r/min without any load (during
closed loop)

-7.0 to 7.0%

Code No.
P0171,
P0172

P.13A-264

P.13A-266

Short-term fuel
trim bank 2

Engine: warming up, 2,500
r/min without any load (during
closed loop)

-7.0 to 7.0 %

Code No.
P0174,
P0175

P.13A-268

P.13A-270

Knock retard

Quick throttle "blips" idle to
3,000 rpm

0 - 4.2

Code No.
P0325

P.13A-346

Fan duty

Ignition switch: "ON" or with
engine running

0 to 100%

Purge control
solenoid VAL.
duty

Ignition switch: "ON"

0 to 100%

Code No.
P0443

P.13A-389

Throttle actuator

Ignition switch:
"ON"

Release the
accelerator
pedal

2 to 4 %

Code No.
P2100,
P2101,
P2102,
P2103

P.13A-455
P.13A-461
P.13A-466
P.13A-471

Depress the
accelerator
pedal fully

100 %

Target ETV value Ignition switch: "ON"

1.1 V

Procedure
No. 10

P.13A-573

Absolute engine
load value

• Engine

coolant
temperature
: 80

− 95°C

• Transaxle:"P"

range

Engine is idling 17.3 %

Code No.
P0106,
P0107,
P0108

P.13A-92
P.13A-101
P.13A-109

2,500 r/min

14.9 %

Revving
engine

Volumetric
efficiency increases
according to
amount of revving.

ITEM
NO.

INSPECTION ITEM

INSPECTION REQUIREMENT

NORMAL CONDITION

INSPECTION
PROCEDURE
NO.

REFERENCE
PAGE

MULTIPORT FUEL INJECTION (MPI) DIAGNOSIS

MULTIPORT FUEL INJECTION (MPI) <3.8L ENGINE>

13A-641

Calculated load
value

Engine:
warming up

Engine is idling 22.7 %

−

2,500 r/min

18.8 %

Brake lamp
switch

> 8V +

OFF

Code No.
P1571

P.17-35

Pedal applied

A/C switch 1

A/C switch:
"ON"

A/C switch
"OFF"

OFF

Procedure
No. 28

P.13A-634

A/C switch
"ON"

Cranking signal

Ignition switch:
"ON"

Engine:
stopped

OFF

Procedure
No. 26

P.13A-624

Engine:
cranking

Power steering
pressure switch

Engine: idling

Steering wheel
stationary

OFF

Steering wheel
turning

Idle position
signal

Engine: idling

Signal

Code No.
P0506,
P0507

P.13A-419
P.13A-421

Signal

OFF

Engine: not
idling

Ignition switch

Ignition switch: IGN switch

"OFF"

OFF

Procedure
No. 26

P.13A-624

IGN switch
"ON"

Neutral switch

Ignition
switch:"ON"

A/T selector in
"P,R,D"

OFF

Procedure
No. 27

P.13A-628

A/T selector in
"N"

Normally closed
brake switch

> 8V +

OFF

Code No.
P1571

P.17-35

Pedal applied

A/C compressor
clutch relay

• Engine: warming up, idling

• A/C switch: "OFF"

OFF

Procedure
No. 28

P.13A-634

• Engine:

warming up,
idling

• A/C switch:

"ON"

A/C
compressor
clutch is not
operating

OFF

A/C
compressor
clutch is
operating

Engine control
relay

Battery 8V +

OFF

Engine
cranking/start

ITEM
NO.

INSPECTION ITEM

INSPECTION REQUIREMENT

NORMAL CONDITION

INSPECTION
PROCEDURE
NO.

REFERENCE
PAGE

MULTIPORT FUEL INJECTION (MPI) DIAGNOSIS

MULTIPORT FUEL INJECTION (MPI) <3.8L ENGINE>

13A-642

Fuel pump relay

Ignition
switch:"ON

Fuel pump
operates for 2
seconds &
then stops

Procedure
No. 25

P.13A-613

Pump stops
after 2 seconds

OFF

Airflow sensor

• Engine

coolant
temperatur
e: 80

−

°C

• Transaxle:"P

" range

Engine is idling 3 to 5 g/sec

Code No.
P0101,
P0102,
P0103

P.13A-78
P.13A-81
P.13A-87

2,500 rpm

13 to16 g/sec

Revving
engine

Increases in
proportion to
amount of revving.

TPS (main)

Ignition
switch:"ON"

Release the
accelerator
pedal

0 %

Code No.
P0122,
P0123

P.13A-148
P.13A-155

Depress the
accelerator
pedal fully

100 %

Oxygen sensor,
bank 1, sensor 1
(front)

Engine:
Warming up
(Air/fuel
mixture is
made leaner
when
decelerating,
and is made
richer when
revving.)

When the
engine is
running at
4,000 r/min,
decelerate
suddenly.

200 mV or less

Code No.
P0130,
P0131,
P0132,
P0133,
P0134

Engine:
Warm

When engine
is suddenly
revved.

600

− 1,000 mV

Engine:
Warming up
(the heated
oxygen sensor
signal is used
to check the
air/fuel mixture
ratio, and
control
condition is
also checked
by the ECU.)

Engine is idling Voltage alternates

quckly between
400mV or less and
600

− 1,000mV.

2500 r/min

Oxygen sensor
bank 1, sensor 2
(rear)

Engine:
warming up

Revving

Alternates slowly
between 0 and 600
− 1,000mV .

Code No.
P0136,
P0137,
P0138,
P0139

ITEM
NO.

INSPECTION ITEM

INSPECTION REQUIREMENT

NORMAL CONDITION

INSPECTION
PROCEDURE
NO.

REFERENCE
PAGE

MULTIPORT FUEL INJECTION (MPI) DIAGNOSIS

MULTIPORT FUEL INJECTION (MPI) <3.8L ENGINE>

13A-643

Oxygen sensor
bank 2, sensor 1
(front)

Engine:
Warming up
(air/fuel
mixture is
made leaner
when
decelerating,
and is made
richer when
revving.)

When the
engine is
running at
4000 r/min,
decelerate
suddenly.

200mV or less

Code No.
P0150,
P0151,
P0152,
P0153,
P0154

Engine:
Warm

When engine
is suddenly
revved.

600

− 1,000mV

Engine:
Warming up
(the heated
oxygen sensor
signal is used
to check the
air/fuel mixture
ratio, and
control
condition is
also checked
by the ECU)

Engine is idling Voltage alternates

quickly between
400mV or less and
600

− 1,000mV.

2,500 r/min

Oxygen sensor
bank 2, sensor 2
(rear)

Engine:
warming up

Revving

Alternates slowly
between 0 and 600
− 1,000mV.

Code No.
P0156,
P0157,
P0158,
P0159

Relative TPS

Ignition
switch:"ON"

Release the
accelerator
pedal

12.5

− 16.5%

Code No.
P0222,
P0223

P.13A-318
P.13A-324

TPS (sub)

Ignition
switch:"ON"

− 100%

Code No.
P0222,
P0223

P.13A-318
P.13A-324

105

Fuel system
status bank 1
(right)

Engine:
warming up

2,500 r/min

Closed loop

Code No.
P0134

P.13A-179

When engine
is suddenly
revved

Open loop

− drive

condition

106

Fuel system
status bank 2
(left)

Engine:
warming up

2,500 r/min

Closed loop

Code No.
P0154

P.13A-231

When engine
is suddenly
revved

Open loop

− drive

condition

107

Clutch switch

> 8V +

OFF

Code No.
P0830

P.17-15

Pedal applied

ITEM
NO.

INSPECTION ITEM

INSPECTION REQUIREMENT

NORMAL CONDITION

INSPECTION
PROCEDURE
NO.

REFERENCE
PAGE

Content .. 635 636 637 638 ..