Mitsubishi Galant (2004+). Manual — part 1352

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>

13B-1101

INJECTO
R BNK2

41

Injectors bank
2 (left)*

2

Engine:
cranking

When engine
coolant
temperature is
0

°C (32°F)

80

− 140 mS

-

-

When engine
coolant
temperature is
20

°C (68°F)

20

− 80 mS

When engine
coolant
temperature is
80

°C (176°F)

8

− 16 mS

Injectors bank
2 (left)*

3

• Engine

coolant
temperature
: 80

− 95°C

(176

−

203

°F)

• Lights,

electric
cooling fan
and all
accessories
: "OFF"*

6

• Transmission

: "P" range

Engine is idling 1.2

− 3.2 mS

2,500 r/min

1.0

− 3.0 mS

When engine
is suddenly
revved

Increases

LONG
TRIM B1

81*

4

Long-term fuel
trim bank 1

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

−12.5 to 12.5% Code No.

P0171,
P0172

P.13B-4
09

,

P.13B-4
19

LONG
TRIM B2

83*

4

Long-term fuel
trim bank 2

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

−12.5 to 12.5% Code No.

P0174,
P0175

P.13B-4
26

,

P.13B-4
35

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

8.0

− 16.0

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) <3.8L ENGINE>

13B-1102

MAP
SENSOR

95

Manifold
absolutel
pressure
(MAP) sensor

• Ignition

switch: "ON"

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

101 kPa (29.8
in.Hg)

Code No.
P0106,
P0107,
P0108

P.13B-6
8

,

P.13B-8
2

,

P.13B-9
4

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

95 kPa (28.1
in.Hg)

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

88 kPa (26.0
in.Hg)

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

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
SNSR

32*

4

Manifold
absolutel
pressure
(MAP) sensor

• Ignition

switch: "ON"

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

101 kPa (29.8
in.Hg)

Code No.
P0106,
P0107,
P0108

P.13B-6
8

,

P.13B-8
2

,

P.13B-9
4

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

95 kPa (28.1
in.Hg)

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

88 kPa (26.0
in.Hg)

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

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

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>

13B-1103

PSP
SWITCH

27

Power steering
pressure
switch

Engine: idling

Steering wheel
stationary

OFF

Code No.
P0551

P.13B-7
97

Steering wheel
turning

ON

SHORT
TRIM B1

82*

4

Short-term fuel
trim bank 1

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

−7.4 to 7.4%

Code No.
P0171,
P0172

P.13B-4
09

,

P.13B-4
19

SHORT
TRIM B2

84*

4

Short-term fuel
trim bank 2

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

−7.4 to 7.4%

Code No.
P0174,
P0175

P.13B-4
26

,

P.13B-4
35

SYS.
STATUS
B1

88*

4

Fuel control
system status
bank 1 (right)

Engine:
warming up

2,500 r/min

Closed loop

Code No.
P0134

P.13B-2
26

When engine
is suddenly
revved

Open loop

−

drive condition

SYS.
STATUS
B2

89*

4

Fuel control
system status
bank 2 (left)

Engine:
warming up

2,500 r/min

Closed loop

Code No.
P0154

P.13B-3
36

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.13B-1
56

,

P.13B-1
66

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) <3.8L ENGINE>

13B-1104

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.13B-1
56

,

P.13B-1
66

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 rise

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.13B-5
34

,

P.13B-5
44

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