Mitsubishi Galant 9G. Manual — part 912

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-1090

HO2S
BANK2
S1

A3*

4

Cylinder 2, 3
heated oxygen
sensor (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.

0.2 V or less

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

P.13A-29
9

,

P.13A-31
7

,

P.13A-32
4

,

P.13A-32
9

,

P.13A-33
5

When engine
is suddenly
revved.

0.6

− 1 V

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 PCM)

Engine is idling Voltage

changes
repeatedly
between 0.4
V or less and
0.6

− 1 V.

2500 r/min

HO2S
BANK2
S2

59

Cylinder 2, 3
heated oxygen
sensor (rear)

Engine:
warming up

Revving

0 and 600

−

1,000 mV
alternate.

Code No.
P0156,
P0157,
P0158,
P0159

P.13A-35
7

,

P.13A-37
5

,

P.13A-38
2

,

P.13A-38
7

HO2S
BANK2
S2

A4*

4

Cylinder 2, 3
heated oxygen
sensor (rear)

Engine:
warming up

Revving

0 and 0.6

− 1

V alternate.

Code No.
P0156,
P0157,
P0158,
P0159

P.13A-35
7

,

P.13A-37
5

,

P.13A-38
2

,

P.13A-38
7

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-1091

IAT
SENSOR

13

Intake air
temperature
sensor

Ignition switch:
"ON" or with
engine running

Intake air
temperature is
−20°C (−4°F)

−20°C (−4°F) Code No.

P0111,
P0112,
P0113

P.13A-10
7

,

P.13A-11
6

,

P.13A-12
3

Intake air
temperature is
0

°C (32°F)

0

°C (32°F)

Intake air
temperature is
20

°C (68°F)

20

°C (68°F)

Intake air
temperature is
40

°C (104°F)

40

°C (104°F)

Intake air
temperature is
80

°C (176°F)

80

°C (176°F)

IAT
SENSOR

13*

4

Intake air
temperature
sensor

Ignition switch:
"ON" or with
engine running

Intake air
temperature is
−20°C (−4°F)

−20°C (−4°F) Code No.

P0111,
P0112,
P0113

P.13A-10
7

,

P.13A-11
6

,

P.13A-12
3

Intake air
temperature is
0

°C (32°F)

0

°C (32°F)

Intake air
temperature is
20

°C (68°F)

20

°C (68°F)

Intake air
temperature is
40

°C (104°F)

40

°C (104°F)

Intake air
temperature is
80

°C (176°F)

80

°C (176°F)

IG.
TIMING
ADV

44

Ignition coils
and ignition
power
transistor

• Engine:

warming up

• Timing light

is set (to
check actual
ignition
timing)

Engine is idling BTDC 2

−18° −

−

2,500 r/min

BTDC 22

−

42

°

IG.
TIMING
ADV

44*

4

Ignition coils
and ignition
power
transistor

• Engine:

warming up

• Timing light

is set (to
check actual
ignition
timing)

Engine is idling 2

− 18 deg

−

−

2,500 r/min

22

− 42 deg

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-1092

INJECTO
R

41

Injectors*

2

Engine:
cranking

When engine
coolant
temperature is
0

°C (32°F)

74

− 94 ms

−

−

When engine
coolant
temperature is
20

°C (68°F)

26.9

− 46.9

ms

When engine
coolant
temperature is
80

°C (176°F)

7.0

− 13.0 ms

Injectors*

2

• Engine

coolant
temperature
: 80

− 95°C

(176

−

203

°F)

• Lights,

electric
cooling fan
and all
accessories
: "OFF"*

5

• Transaxle:

"P" range

Engine is idling 2.2

− 3.4 ms

2,500 r/min

2.2

− 3.4 ms

When engine
is suddenly
revved

Increases

LONG
TRIM B1

81*

4

Cylinder 1, 4
long-term fuel
trim

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

−12.5 to

12.5%

Code No.
P0171,
P0172

P.13A-40
6

,

P.13A-41
5

LONG
TRIM B2

83*

4

Cylinder 2, 3
long-term fuel
trim

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

−12.5 to

12.5%

Code No.
P0174,
P0175

P.13A-42
1

,

P.13A-43
0

MAF
SENSOR

12

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

g/sec

−

−

2,500 r/min

6.5

− 14.5

g/sec

Engine is
revved

Mass airflow
rate increases
in response to
revving

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-1093

MAP
SENSOR

95

Manifold
absolute
pressure
sensor

Ignition switch:
"ON"

Engine
stopped [At
altitude of 0 m
(0 ft.)]

101 kPa (29.8
in.Hg)

Code No.
P0106,
P0107,
P0108

P.13A-72

,

P.13A-86

,

P.13A-98

Engine
stopped [At
altitude of 600
m (1,969 ft.)]

95 kPa (28.1
in.Hg)

Engine
stopped [At
altitude of
1,200 m (3,937
ft.)]

88 kPa (26.0
in.Hg)

Engine
stopped [At
altitude of
1,800 m (5,906
ft.)]

81 kPa (23.9
in.Hg)

Engine: warming up, idling

16

− 36 kPa

(4.7

− 10.6

in.Hg)

When engine is suddenly
revved

Manifold
pressure
varies

MAP/MD
P SNSR.

32*

4

Manifold
absolute
pressure
sensor

Ignition switch:
"ON"

Engine
stopped [At
altitude of 0 m
(0 ft.)]

101 kPa (29.8
in.Hg)

Code No.
P0106,
P0107,
P0108

P.13A-72

,

P.13A-86

,

P.13A-98

Engine
stopped [At
altitude of 600
m (1,969 ft.)]

95 kPa (28.1
in.Hg)

Engine
stopped [At
altitude of
1,200 m (3,937
ft.)]

88 kPa (26.0
in.Hg)

Engine
stopped [At
altitude of
1,800 m (5,906
ft.)]

81 kPa (23.9
in.Hg)

Engine: warming up, idling

16

− 36 kPa

(4.7

− 10.6

in.Hg)

When engine is suddenly
revved

Manifold
pressure
varies

MUT-III
SCAN TOOL
DISPLAY

ITEM
NO.

INSPECTION ITEM

INSPECTION REQUIREMENT

NORMAL
CONDITION

INSPECTION
PROCEDURE
NO.

REFERENCE
PAGE