Mitsubishi Montero Sport (2004+). Manual — part 360

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-853

TANK
PRS.
SNSR

73

Fuel tank
differential
pressure
sensor

• Ignition switch: "ON"

• Fuel cap removal

−3.3 − 3.3

kPa (

−0.97

− 0.97

in.Hg)

−

−

TP
SENSOR

14

Throttle
position
sensor

Ignition switch:
"ON"

Set to idle
position

535

− 735

millivolts

Code No.
P0121,
P0122,
P0123

P.13A-137

,

P.13A-148

,

P.13A-157

Gradually
open

Increases
in
proportion
to throttle
opening
angle

Open fully

4,500

−

5,500
millivolts

TP
SENSOR

8A*

6

Throttle
position
sensor

Ignition switch:
"ON"

Set to idle
position

6

− 20%

Code No.
P0121,
P0122,
P0123

P.13A-137

,

P.13A-148

,

P.13A-157

Gradually
open

Increases
in
proportion
to throttle
opening
angle

Open fully

80

− 100%

VAF
RESET
SIG

34

Volume airflow
sensor reset
signal

Engine:
warming up

Engine is
idling

ON

−

−

2,500 r/min

OFF

VAF
SENSOR

12

Volume airflow
sensor*

1

• Engine

coolant
temperature
: 80

− 95°C

(176

−

203

°F)

• Lights,

electric
cooling fan
and all
accessories
: "OFF"*

7

• Transmission

: "P" range

Engine is
idling

18

− 44 Hz −

−

2,500 r/min

58

− 98 Hz

Engine is
revved

Frequency
(or air flow
volume)
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)

13A-854

ACTUATOR TEST REFERENCE TABLE

M1131152500547

NOTE: *: Continues for 27 minutes. Can be released
by pressing the CLEAR key.

VAF/MAF
SNSR.

12*

6

Volume airflow
sensor (mass
airflow rate)*

1

• Engine

coolant
temperature
: 80

− 95°C

(176

−

203

°F)

• Lights,

electric
cooling fan
and all
accessories
: "OFF"*

7

• Transmission

: "P" range

Engine is
idling

3.7

− 7.6

gm/s

−

−

2,500 r/min

11.9

− 17.9

gm/s

Engine is
revved

Frequency
(or air flow
volume)
increases
in response
to revving

VSS

24*

6

Vehicle speed
signal

Drive at 40 km/h (25 mph).

Approximat
ely 40 km/h
(mph).

-

-

MUT-III
SCAN
TOOL
DISPLAY

ITEM
NO.

INSPECTION
ITEM

INSPECTION REQUIREMENT

NORMAL
CONDITION

INSPECTION
PROCEDURE
NO.

REFERENCE
PAGE

MUT-III
SCAN
TOOL
DISPLAY

ITEM
NO.

INSPECTION
ITEM

DRIVE
CONTENTS

INSPECTION
REQUIREMENT

NORMAL
CONDITION

INSPECTION
PROCEDURE
NO.

REFERENCE
PAGE

BSIC
TIMING

17*

Basic
ignition
timing

Set to ignition
timing
adjustment
mode

• Engine: idling

• Connect timing light

5

° BTDC

-

-

EGR
SOLENOID

10

EGR
vacuum
regulator
solenoid
valve

Solenoid
valve turns
from OFF to
ON.

Ignition switch: "ON"

Clicks
when
solenoid
valve is
driven.

Code
No.P0403

P.13A-486

EVAP
PURGE
SOL

08

Evaporative
emission
purge
solenoid

Solenoid
valve turns
from OFF to
ON.

Ignition switch:"ON"

Clicks
when
solenoid
valve is
driven.

Code
No.P0443

P.13A-523

EVAP
VENT SOL

29

Evaporative
emission
ventilation
solenoid

Solenoid
valve turns
from OFF to
ON.

Ignition switch:"ON"

Clicks
when
solenoid
valve is
driven.

Code
No.P0446

P.13A-532

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-855

FUEL
PUMP

07

Fuel pump

Fuel pump
operates and
fuel is
recirculated

Ignition
switch:
"ON"

Pinch the
return
hose with
fingers to
feel the
pulse of
the fuel
being
recirculate
d

Pulse is
felt

Procedure
No.29

P.13A-813

Listen
near the
fuel tank
for the
sound of
fuel pump
operation

Sound of
operation
is heard

NO. 1
INJECTOR

01

Injectors

Cut fuel to
No.1 injector

Engine: warm, idle (cut
the fuel supply to each
injector in turn and
check cylinders which
don't affect idling.)

Idling
condition
becomes
different
(becomes
unstable)

Code
No.P0201,
P0202,
P0203,
P0204,
P0205,
P0206

P.13A-428

NO. 2
INJECTOR

02

Cut fuel to
No.2 injector

NO. 3
INJECTOR

03

Cut fuel to
No.3 injector

NO. 4
INJECTOR

04

Cut fuel to
No.4 injector

NO. 5
INJECTOR

05

Cut fuel to
No.5 injector

NO. 6
INJECTOR

06

Cut fuel to
No.6 injector

RADIAT.
FAN LO

21

A/C
condenser
fan

Drive the fan
motor

Ignition switch : "ON"

A/C
condenser
fan rotate

Procedure
No.27

P.13A-802

MUT-III
SCAN
TOOL
DISPLAY

ITEM
NO.

INSPECTION
ITEM

DRIVE
CONTENTS

INSPECTION
REQUIREMENT

NORMAL
CONDITION

INSPECTION
PROCEDURE
NO.

REFERENCE
PAGE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-856

CHECK AT PCM TERMINAL

M1131153600280

TERMINAL VOLTAGE CHECK CHART

AKX01368

105 106 107

118 119 120

129

104

112

103

111

124

102

109

122

101

108

121

77

89

98

76

88

75

87

97

74

81

73

80

92

72

79

91

71

78

90

46

57

66

45

56

65

44

55

43

49

54

64

42

48

59

41

47

58

8

23

35

7

22

21

34

6

20

33

5

19

32

4

13

27

3

12

11

26

2

10

25

1

9

24

18

31

17

16

30

15

29

14

28

53

63

52

62

51

61

50

60

86

96

85

84

95

83

94

82

93

110

123

117

128

116

127

115

114

126

113

125

130

PCM Connector Terminal Arrangement

AB

TERMINAL NO. INSPECTION

ITEM

INSPECTION CONDITION (ENGINE
CONDITION)

NORMAL
CONDITION

1

No.1 injector

• Engine: warming up, idling

• Suddenly depress the accelerator pedal

From 11

− 14

volts
momentarily
drops slightly

9

No.2 injector

24

No.3 injector

2

No.4 injector

10

No.5 injector

25

No.6 injector

3

Left bank heated
oxygen sensor
heater (front)

Engine: warming up, idling (15 seconds after
starting engine)

9

− 11 volts

Engine: Revving

9

− 11 volts →

B+
(momentarily)

4

Right bank heated
oxygen sensor
heater (front)

Engine: warming up, idling (15 seconds after
starting engine)

9

− 11 volts

Engine: Revving

9

− 11 volts →

B+
(momentarily)

6

EGR vacuum
regulator solenoid
valve

Ignition switch: "ON"

B+

• Engine: idling

• Suddenly depress the accelerator pedal.

From B+, drops
momentarily

11

Ignition power
transistor unit A

Engine: 3,000 r/min

0.3

− 3.0 volts

12

Ignition power
transistor unit B

13

Ignition power
transistor unit C