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