Mitsubishi Galant. Manual — part 316

MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-489

CRANK
SENSOR

22

Crankshaft
position

sensor

*1

•

Engine: cranking

•

Tachometer: connected

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

Code
No.P0335

P.13B-
240

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)

600

−

800 r/

min

CRANK
SENSOR
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-
240

CRANK.
SIGNAL

18

Cranking
signal (ignition
switch-ST)

Ignition switch:
"ON"

Engine:
stopped

OFF

Procedure
No.30

P.13B-
477

Engine:
cranking

ON

MUT-II
SCAN
TOOL
DISPLAY

ITEM
NO.

INSPECTION
ITEM

INSPECTION REQUIREMENT

NORMAL
CONDITION

INSPECTION
PROCEDURE
NO.

REFER
ENCE
PAGE

MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-490

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.P0115,
P0116,P01
17

P.13B-
65

,

P.13

B-
73

,

P.13

B-78

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)

ENGINE
LOAD

37

Volumetric
efficiency

•

Engine
coolant
temperature

•

Lights,
electric
cooling fan
and all
accessories
: OFF

•

Transaxle:
"P" range

Engine is idling 15

−

35 %

-

-

2,500 r/min

15

−

35 %

Racing

Volumetric
efficiency
increases
according to
amount of
revving.

MUT-II
SCAN
TOOL
DISPLAY

ITEM
NO.

INSPECTION
ITEM

INSPECTION REQUIREMENT

NORMAL
CONDITION

INSPECTION
PROCEDURE
NO.

REFER
ENCE
PAGE

MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-491

HO2S
BANK1
S1

39

Heated oxygen
sensor (bank
1, sensor 1)

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

When at 4,000
r/min, engine is
suddenly
decelerated.

200 mV or less

→

600

−

1,000

mV (After
several
seconds have
elapsed)

Code
No.P0130,
P0133,P01
34

P.13B-
107

,

P.1

3B-
116

,

P.1

3B-118

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
S2

69

Heated oxygen
sensor (bank
1, sensor 2)

Engine:
warming up

Revving

0 and 600

−

1,000 mV
alternate.

Code
No.P0136,
P0139

P.13B-
132

,

P.1

3B-141

HO2S
BANK2
S1

11

Heated oxygen
sensor (bank
2, sensor 1)

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

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

200 mV or less
to 600

−

1,000

mV (After
several
seconds have
elapsed)

Code
No.P0150,
P0153,P01
54

P.13B-
151

,

P.1

3B-
159

,

P.1

3B-161

Engine: Warm
(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

alternates
between 400
mV or less and
600 - 1,000
mV.

2,500 r/min

HO2S
BANK2
S2

59

Heated oxygen
sensor (bank
2, sensor 2)

Engine:
warming up

Revving

0 and 600

−

1,000 mV
alternate.

Code
No.P0156,
P0159

P.13B-
174

,

P.1

3B-182

MUT-II
SCAN
TOOL
DISPLAY

ITEM
NO.

INSPECTION
ITEM

INSPECTION REQUIREMENT

NORMAL
CONDITION

INSPECTION
PROCEDURE
NO.

REFER
ENCE
PAGE

MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-492

IAC
VALVE
POS

45

Idle air control
(stepper)

position

*2

•

Engine
coolant
temperature
: 80

−

95

°

C

(176

−

203

°

F)

•

Lights,
electric
cooling fan
and all
accessories
: OFF

•

Transaxle:
"P" range

•

Engine:
idling (when
A/C switch
is "ON."A/C
compressor
should be
operating)

A/C switch:
"OFF"

2

−

25 steps

-

-

A/C switch:
"OFF"

→

"ON"

Increases by
10

−

70 steps

A/C switch:
"N"

→

"D"

Increases by 5

−

50 steps

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

P.13B-
56

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 7

−

23

°

BTDC

-

-

2,500 r/min

28

−

48

°

BTDC

MUT-II
SCAN
TOOL
DISPLAY

ITEM
NO.

INSPECTION
ITEM

INSPECTION REQUIREMENT

NORMAL
CONDITION

INSPECTION
PROCEDURE
NO.

REFER
ENCE
PAGE