Mitsubishi Galant (2004+). Manual — part 1350

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>

13B-1093

APP
SNSR
(SUB)

77

Accelerator
pedal position
sensor (sub)

Ignition switch:
"ON"

Release the
accelerator
pedal

400

− 1,000

mV

Code No.
P2127,
P2128

P.13B-9
06

,

P.13B-9
16

Depress the
accelerator
pedal gradually

Increases in
response to
the pedal
depression
stroke

Depress the
accelerator
pedal fully

3,700 mV or
more

BARO
SENSOR

25

Barometric
pressure
sensor

Ignition switch:
"ON"

At altitude of 0
m (0 ft)

101 kPa (29.8
in.Hg)

Code No.
P2227,
P2228,
P2229

P.13B-9
43

,

P.13B-9
45

,

P.13B-9
47

At altitude of
600 m (1,969
ft)

95 kPa (28.1
in.Hg)

At altitude of
1,200 m (3,937
ft)

88 kPa (26.0
in.Hg)

At altitude of
1,800 m (5,906
ft)

81 kPa (23.9
in.Hg)

BATT
VOLTAGE

16

Power supply
voltage

Ignition switch: "ON"

Battery positive
voltage

Procedure
No. 28

P.13B-1
050

CKP
SNSR

22

Crankshaft
position sensor

• Engine: cranking

• Tachometer: connected

Engine speeds
displayed on
the scan tool
and
tachometer are
identical.

Code No.
P0335

P.13B-5
83

Engine: idling

Engine coolant
temperature is
−20°C (−40°F)

1,300

− 1,500

r/min

Engine coolant
temperature is
0

°C (32°F)

1,300

− 1,500

r/min

Engine coolant
temperature is
20

°C (68°F)

1,300

− 1,500

r/min

Engine coolant
temperature is
40

°C (104°F)

1,040

− 1,240

r/min

Engine coolant
temperature is
80

°C (176°F)

580

− 780

r/min

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-1094

CKP
SNSR 2

38

Crankshaft
position sensor

• Engine: cranking (at less

than 2,000 r/min)

• Tachometer: connected

The speeds
indicated by
the scan tool
and
tachometer
match.

Code No.
P0335

P.13B-5
83

CRANK.
SIGNAL

18

Cranking
signal (ignition
switch -ST)

Ignition switch:
"ON"

Engine:
stopped

OFF

Procedure
No. 30

P.13B-1
074

Engine:
cranking

ON

ECT
SENSOR

21

Engine coolant
temperature
sensor

Ignition switch:
"ON" or with
engine running

Engine coolant
temperature is
−20°C (−4°F)

-20

°C (-4°F)

Code No.
P0116,
P0117,
P0118

P.13B-1
29

,

P.13B-1
38

,

P.13B-1
45

Engine coolant
temperature is
0

°C (32°F)

0

°C (32°F)

Engine coolant
temperature is
20

°C (68°F)

20

°C (68°F)

Engine coolant
temperature is
40

°C(104°F)

40

°C (104°F)

Engine coolant
temperature is
80

°C (176°F)

80

°C (176°F)

ECT
SENSOR

21*

4

Engine coolant
temperature
sensor

Ignition switch:
"ON" or with
engine running

Engine coolant
temperature is
−20°C (−4°F)

−20°C (−4°F)

Code No.
P0116,
P0117,
P0118

P.13B-1
29

,

P.13B-1
38

,

P.13B-1
45

Engine coolant
temperature is
0

°C (32°F)

0

°C (32°F)

Engine coolant
temperature is
20

°C (68°F)

20

°C (68°F)

Engine coolant
temperature is
40

°C (104°F)

40

°C (104°F)

Engine coolant
temperature is
80

°C (176°F)

80

°C (176°F)

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-1095

EGR
STEP.
MTR.

68

EGR valve
(stepper motor)

• Engine

coolant
temperature
:80

− 95°C

(176

−

203

°F)

• Lights and

all
accessories
: "OFF"*

5

• Transaxle:"P"

range

Engine is idling 2

− 8 STEP

Code No.
P0403

P.13B-6
25

2,500 r/min

2

− 8 STEP

ENGINE
LOAD

37

Engine load
(volumetric
efficiency)

• Engine

coolant
temperature
: 80

− 95°C

(176

−

203

°F)

• Lights,

electric
cooling fan
and all
accessories
: "OFF"*

6

• Transaxle:"P"

range

Engine is idling 14

− 24%

−

−

2,500 r/min

11

− 21%

Revving
engine

Volumetric
efficiency
increases
according to
amount of
revving.

ENGINE
LOAD

87*

4

Calculated
load value

Engine:
warming up

Engine is idling 14

− 24%

−

−

2,500 r/min

11

− 21%

ENGINE
SPEED

22*

4

Crankshaft
position sensor

• Engine: cranking

• Tachometer: connected

Engine speeds
displayed on
the scan tool
and
tachometer are
identical.

Code No.
P0335

P.13B-5
83

Engine: idling

Engine coolant
temperature is
−20°C (−4°F)

1,300

− 1,500

r/min

Engine coolant
temperature is
0

°C (32°F)

1,300

− 1,500

r/min

Engine coolant
temperature is
20

°C (68°F)

1,300

− 1,500

r/min

Engine coolant
temperature is
40

°C (104°F)

1,040

− 1,240

r/min

Engine coolant
temperature is
80

°C (176°F)

580

− 780

r/min

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-1096

FUEL
TEMP

4A

Fuel tank
temperature
sensor

• In cooled state

• Ignittion switch: "ON"

Approximately
the same as
the outdoor
temperature

Code No.
P0181,
P0182,
P0183

P.13B-4
41

,

P.13B-4
53

,

P.13B-4
60

HO2S
BANK1
S1

39

Heated oxygen
sensor bank 1,
sensor 1 (right
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

P.13B-1
89

,

P.13B-2
07

,

P.13B-2
14

,

P.13B-2
20

,

P.13B-2
26

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 PCM.)

Engine is idling Voltage

changes
repeatedly
between 400
mV or less and
600

− 1,000

mV.

2500 r/min

HO2S
BANK1
S1

A1*

4

Heated oxygen
sensor bank 1,
sensor 1 (right
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.
P0130,
P0131,
P0132,
P0133,
P0134

P.13B-1
89

,

P.13B-2
07

,

P.13B-2
14

,

P.13B-2
20

,

P.13B-2
26

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

MUT-III SCAN
TOOL DISPLAY

ITEM NO.

INSPECTION ITEM

INSPECTION REQUIREMENT

NORMAL CONDITION

INSPECTION
PROCEDURE NO.

REFERENCE
PAGE