Mitsubishi Galant 9G. Manual — part 913

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-1094

MIL
DISTANC
E

A9*

6

MIL distance

Running distance in the malfunction indicator
lamp (SERVICE ENGINE SOON or Check
Engine Lamp) ON

−

−

PSP
SWITCH

27

Power steering
pressure
switch

Engine: idling

Steering wheel
turning

OFF

Code No.
P0551

P.13A-79
1

Steering wheel
turning

ON

SHORT
TRIM B1

82*

4

Cylinder 1, 4
short-term fuel
trim

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

−10 to 10%

<Federal>,
−10 to 7.0%

<California>

Code No.
P0171,
P0172

P.13A-40
6

,

P.13A-41
5

SHORT
TRIM B2

84*

4

Cylinder 2, 3
short-term fuel
trim

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

−10 to 10%

<Federal>,
−10 to 7.0%

<California>

Code No.
P0174,
P0175

P.13A-42
1

,

P.13A-43
0

SYS.
STATUS
B1

88*

4

Cylinder 1, 4
Fuel control
system status

Engine:
warming up

2,500 r/min

Closed loop

Code No.
P0134

P.13A-22
8

When engine
is suddenly
revved

Open loop

−

drive
condition

SYS.
STATUS
B2

89*

4

Cylinder 2, 3
Fuel control
system status

Engine:
warming up

2,500 r/min

Closed loop

Code No.
P0154

P.13A-33
5

When engine
is suddenly
revved

Open loop

−

drive
condition

TANK
PRS.
SNSR

73

Fuel tank
differential
pressure
sensor

• Ignition switch: "ON"

• Fuel cap removal

−3.3 to 3.3

kPa
(

−0.97 to 0.97

in.Hg)

−

−

TP
LEARN
MID

9A

Throttle
position sensor
(main)
mid opening
learning value

Ignition switch: "ON"

600

− 1,200

mV

Code No.
P0122,
P0123

P.13A-15
9

,

P.13A-16
9

MUT-III
SCAN TOOL
DISPLAY

ITEM
NO.

INSPECTION ITEM

INSPECTION REQUIREMENT

NORMAL
CONDITION

INSPECTION
PROCEDURE
NO.

REFERENCE
PAGE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-1095

TP SNSR
(MAIN)

79

Throttle
position sensor
(main)

• Remove the

intake air
hose at the
throttle body

• Disconnect

the throttle
position
sensor
connector,
and then
connect
terminal
numbers
No. 3, No. 4,
No. 5 and
No. 6 with
the use of
the special
tool:
MB991658.

• Ignition

switch: "ON"

Fully close the
throttle valve
with your finger

300

− 700 mV Code No.

P0122,
P0123

P.13A-15
9

,

P.13A-16
9

Fully open the
throttle valve
with your finger

4,000 mV or
more

Engine:
warming up,
idling

No load

520

− 620 mV

A/C switch:
"OFF"

→ "ON"

Voltage varies

Shift lever: "N"
→ "D"

TP SNSR
(SUB)

14

Throttle
position sensor
(sub)

• Remove the

intake air
hose at the
throttle body

• Disconnect

the throttle
position
sensor
connector,
and then
connect
terminal
numbers
No. 3, No. 4,
No. 5 and
No. 6 with
the use of
the special
tool:
MB991658.

• Ignition

switch: "ON"

Fully close the
throttle valve
with your finger

2,200

− 2,800

mV

Code No.
P0222,
P0223

P.13A-50
4

,

P.13A-51
4

Fully open the
throttle valve
with your finger

4,000 mV or
more

MUT-III
SCAN TOOL
DISPLAY

ITEM
NO.

INSPECTION ITEM

INSPECTION REQUIREMENT

NORMAL
CONDITION

INSPECTION
PROCEDURE
NO.

REFERENCE
PAGE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-1096

TP SNSR 8A*

4

Throttle
position sensor

• Remove the

intake air
hose at the
throttle body

• Disconnect

the throttle
position
sensor
connector,
and then
connect
terminal
numbers
No. 3, No. 4,
No. 5 and
No. 6 with
the use of
the special
MB991658
tool.

• Ignition

switch: "ON"

Fully close the
throttle valve
with your finger

0

− 5%

Code No.
P0122,
P0123

P.13A-15
9

,

P.13A-16
9

Fully open the
throttle valve
with your finger

88% or more

TR
SWITCH

29

Transmission
range switch

P or N

P, N

P0705
(DTC27),
P0705
(DTC28)

P.23A-12
0

,

P.23A-1

65

Except P or N

D, 2, L, R

VAF/MAF
SNSR.

12*

4

Mass airflow
sensor*

1

• Engine

coolant
temperature
: 80

− 95°C

(176

−

203

°F)

• Lights,

electric
cooling fan
and all
accessories
: "OFF"*

5

• Transaxle:

"P" range

Engine is idling 2.0

− 6.0 gm/s −

−

2,500 r/min

6.5

− 14.5

gm/s

Engine is
revved

Mass airflow
rate increases
in response to
revving

VSS

24*

4

Vehicle speed
signal

Drive at 40 km/h (25 mph).

Approximatel
y 40 km/h (25
mph)

−

−

MUT-III
SCAN TOOL
DISPLAY

ITEM
NO.

INSPECTION ITEM

INSPECTION REQUIREMENT

NORMAL
CONDITION

INSPECTION
PROCEDURE
NO.

REFERENCE
PAGE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-1097

ACTUATOR TEST REFERENCE TABLE

M1131152500956

NOTE: *: Continues for 27 minutes. Can be released
by pressing the CLEAR key.

MUT-III
SCAN
TOOL
DISPLAY

ITEM
NO.

INSPECTION
ITEM

DRIVE
CONTENTS

INSPECTION REQUIREMENT

NORMAL
CONDITION

INSPECTION
PROCEDURE
NO.

REFERENCE
PAGE

BASIC
TIMING

17*

Basic
ignition
timing

Set to ignition
timing
adjustment
mode

• Engine: idling

• Connect timing light

5

°BTDC

−

−

EVAP
PURG
SOL

08

Evaporativ
e emission
purge
solenoid

Solenoid
valve turns
from OFF to
ON.

Ignition switch: "ON"

Clicks
when
solenoid
valve is
driven.

Code No.
P0443

P.13A-62
6

EVAP
VENT
SOL

29

Evaporativ
e emission
ventilation
solenoid

Solenoid
valve turns
from OFF to
ON.

Ignition switch: "ON"

Clicks
when
solenoid
valve is
driven.

Code No.
P0446

P.13A-63
7

FUEL
PUMP

07

Fuel pump Fuel pump

operates and
fuel is
recirculated

Ignition
switch: "ON"

Listen near
the fuel tank
for the
sound of
fuel pump
operation

Sound of
operation
is heard

Procedure
No. 29

P.13A-10
54

NO. 1
INJECT
OR

01

Injectors

Cut fuel to
No. 1 injector

Engine: warm up, idle (cut
the fuel supply to each
injector in turn and check
cylinders which don't
affect idling.)

Idling
becomes
unstable

Code No.
P0201

P.13A-46
4

NO. 2
INJECT
OR

02

Cut fuel to
No. 2 injector

Code No.
P0202

P.13A-47
4

,

NO. 3
INJECT
OR

03

Cut fuel to
No. 3 injector

Code No.
P0203

P.13A-48
4

,

NO. 4
INJECT
OR

04

Cut fuel to
No. 4 injector

Code No.
P0204

P.13A-49
4

OCV

22

Engine oil
control
valve

Engine oil
control valve
turns from
OFF to ON

Engine: warming up,
2,000 r/min

The
engine
speed is
changed.

Code No.
P1021

P.13A-85
4