Mitsubishi Galant 9G. Manual — part 1210

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>

13B-1140

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-646

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%

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-1141

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-604

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

FUEL
TEMP

4A

Fuel tank
temperature
sensor

• In cooled state

• Ignittion switch: "ON"

Approximate
ly the same
as the
outdoor
temperature

Code No.
P0181,
P0182,
P0183

P.13B-449

,

P.13B-462

,

P.13B-470

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-1142

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-195

,

P.13B-213

,

P.13B-220

,

P.13B-225

,

P.13B-231

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-195

,

P.13B-213

,

P.13B-220

,

P.13B-225

,

P.13B-231

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

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>

13B-1143

HO2S
BANK1
S2

69

Heated oxygen
sensor bank 1,
sensor 2 (right
rear)

Engine:
warming up

Revving

0 and 600

−

1,000 mV
alternate.

Code No.
P0136,
P0137,
P0138,
P0139

P.13B-255

,

P.13B-273

,

P.13B-280

,

P.13B-285

HO2S
BANK1
S2

A2*

4

Heated oxygen
sensor bank 1,
sensor 2 (right
rear)

Engine:
warming up

Revving

0 and 0.6

− 1

V alternate.

Code No.
P0136,
P0137,
P0138,
P0139

P.13B-255

,

P.13B-273

,

P.13B-280

,

P.13B-285

HO2S
BANK2
S1

11

Heated oxygen
sensor bank 2,
sensor 1 (left
front)

Engine:
Warming up
(air/fuel
mixture is
made leaner
when
decelerating,
and is made
richer when
revving.)

When the
engine is
running at
4000 r/min,
decelerate
suddenly.

200 mV or
less

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

P.13B-305

,

P.13B-323

,

P.13B-330

,

P.13B-335

,

P.13B-341

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.

2,500 r/min

MUT-III
SCAN TOOL
DISPLAY

ITEM
NO.

INSPECTION ITEM

INSPECTION REQUIREMENT

NORMAL
CONDITION

INSPECTION
PROCEDURE
NO.

REFERENCE
PAGE