Mitsubishi Outlander (2003+). Manual — part 108

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MFI)

13A-295

8

A/C relay

œ

Engine: Idle speed

œ

A/C switch: OFF

“

ON (A/C compressor

is operating)

System voltage or
Momentarily 6V or more

“

1 V or less

9

Purge control
solenoid valve

Ignition switch: "ON"

System voltage

Running at 3,500 r/min while engine is
warming up after having been started.

1 V or less

10

Ignition coil

-

No. 1,

No. 4

Engine r/min: 3,000 r/min

0.3

-

3.0 V

23

Ignition coil

-

No. 2,

No. 3

12

Power supply

Ignition switch: "ON"

System voltage

25

19

Air flow sensor reset
Signal

Engine: Idle speed

0

-

1 V

Engine r/min: 3,000 r/min

6

-

9 V

21

Fan controller

Radiator and condenser fan is not operating

0

-

0.3 V

Radiator and condenser fan is operating

0.7 V or more

22

Fuel pump relay

Ignition switch: ON

System voltage

Engine: Idle speed

1 V or less

24

A/C load signal

Refer to GROUP 55 - Troubleshooting (Inspection at the Automatic
compressor - ECU Terminal)

33

Alternator G terminal

œ

Engine: Warm, idle (radiator fan: OFF)

œ

Headlamp: OFF

“

ON

œ

Stop lamp: OFF

“

ON

œ

Rear defogger switch: OFF

“

ON

Voltage increases by 0.2

-

3.5 V

36

Engine warming
lamp

Ignition switch: "LOCK" (OFF)

“

"ON"

1 V or less

“

System

voltage (After several
seconds have elapsed)

37

Power steering fluid
pressure switch

Engine: Idling after
warming up

When steering wheel
is Stationary

System voltage

When steering wheel
is turned

1 V or less

38

Control relay (Power
supply)

Ignition switch: "LOCK" (OFF)

System voltage

Ignition switch: "ON"

1 V or less

41

Alternator FR
terminal

œ

Engine: Warm, idle (radiator fan: OFF)

œ

Headlamp: OFF

“

ON

œ

Stop lamp: OFF

“

ON

œ

Rear defogger switch: OFF

“

ON

Voltage decreases

42

A/C pressure sensor

œ

Engine: Idling

œ

A/C switch: ON

When A/C is "MAX,
COOL" condition
(when the load by
A/C is high)

2.2 V or more

When A/C is "MAX,
HOT" condition (when
the load by A/C is
low)

1.8 V or less

Terminal
No.

Check item

Check condition (Engine condition)

Normal condition

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MFI)

13A-296

45

A/C switch

Engine: Idle speed

Turn the A/C switch
OFF

0.5 V or less

Turn the A/C switch
ON (A/C compressor
is operating)

System voltage

54

Oxygen sensor
heater (rear)

Engine: Idling after warming up

1 V or less

Engine r/min:Racing

System voltage

58

Tachometer signal

Engine r/min: 3,000 r/min

0.3

-

3.0 V

60

Oxygen sensor
heater (front)

Engine: Idling after warming up

1 V or less

Engine r/min:5,000 r/min

System voltage

71

Ignition switch

-

ST

Engine: Cranking

8 V or more

72

Intake air
temperature sensor

Ignition switch: "ON"

When intake air
temperature is

-

20

•

C

3.8

-

4.4 V

When intake air
temperature is 0

•

C

3.2

-

3.8 V

When intake air
temperature is 20

•

C

2.3

-

2.9 V

When intake air
temperature is 40

•

C

1.5

-

2.1 V

When intake air
temperature is 60

•

C

0.8

-

1.4 V

When intake air
temperature is 80

•

C

0.4

-

1.0 V

75

Oxygen sensor
(rear)

Engine: Idling after warmed up (Check using
a digital type voltmeter)

0

À

0.6 V (Changes

repeatedly)

76

Oxygen sensor
(front)

Engine: Running at 2,500 r/min after warmed
up (Check using a digital type voltmeter)

0

À

0.8 V (Changes

repeatedly)

80

Backup power
supply

Ignition switch: "LOCK" (OFF)

System voltage

81

Sensor impressed
voltage

Ignition switch: "ON"

4.9

-

5.1 V

82

Ignition switch

-

IG

Ignition switch: "ON"

System voltage

83

Engine coolant
temperature sensor

Ignition switch: "ON"

When engine coolant
temperature is

-

20

•

C

3.9

-

4.5 V

When engine coolant
temperature is 0

•

C

3.2

-

3.8 V

When engine coolant
temperature is 20

•

C

2.3

-

2.9 V

When engine coolant
temperature is 40

•

C

1.3

-

1.9 V

When engine coolant
temperature is 60

•

C

0.7

-

1.3 V

When engine coolant
temperature is 80

•

C

0.3

-

0.9 V

Terminal
No.

Check item

Check condition (Engine condition)

Normal condition

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MFI)

13A-297

CHECK CHART FOR RESISTANCE AND
CONTINUITY BETWEEN TERMINALS

1. Turn the ignition switch to "LOCK" (OFF) position.
2. Disconnect the engine-ECU connector.
3. Measure the resistance and check for continuity

between the terminals of the engine-ECU
harness-side connector while referring to the
check chart.

NOTE:

.

1. When measuring resistance and checking

continuity, a harness for checking contact pin
pressure should be used instead of inserting a
test probe.

2. Checking need not be carried out in the order

given in the chart.

CAUTION

If the terminals that should be checked are mis-
taken, or if connector terminals are not correctly
shorted to earth, damage may be caused to the
vehicle wiring, sensors, engine-ECU and/or ohm-
meter. Be careful to prevent this!
4. If the ohmmeter shows any deviation from the

standard value, check the corresponding sensor,
actuator and related electrical wiring, and the
repair or replace.

5. After repair or replacement, recheck with the

ohmmeter to confirm that the repair or
replacement has corrected the problem.

84

Throttle position
sensor

Ignition switch: "ON"

Set throttle valve to
idle Position

0.535

-

0.735 V

Fully open throttle
valve

4.4

-

5.3 V

85

Barometric pressure
sensor

Ignition switch: "ON"

Altitude: 0 m

3.8

-

4.2 V

Altitude: 600 m

3.5

-

3.9 V

Altitude: 1,200 m

3.3

-

3.7 V

Altitude: 1,800 m

3.0

-

3.4 V

86

Vehicle speed
sensor

œ

Ignition switch: "ON"

œ

Move the vehicle forword slowly

0

À

5 V Changes

repeatedly

88

Camshaft position
sensor

Engine: Cranking

0.4

-

3.0 V

Engine: Idling

1.5

-

3.0 V

89

Crank angle sensor

Engine: Cranking

0.4

-

4.0 V

Engine: Idling speed

1.5

-

2.5 V

90

Air flow sensor

Engine: Idle speed

2.2

-

3.2 V

Engine r/min: 2,500 r/min

Terminal
No.

Check item

Check condition (Engine condition)

Normal condition

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MFI)

13A-298

Engine-ECU Harness Side Connector Terminal Arrangement

INSPECTION PROCEDURE USING
OSCILLOSCOPE

M1131154500479

The output signals of the sensors and the conditions
of the actuation signals of the actuators can be
inspected visually by observing the waveforms on

the oscilloscope.

AK300343

1

14

4

19

5

22

6

17

8

15

9

18

7

20

16

2

13 12

23

24

25

26

21

3

10

11

58

60

61

53 52 51

55 54

56

59

62

57

34 33 32

36 35

37

42

45

31

39

38

46

40

41

43

44

82

78

8180

89

90

91

92

79

87

71

74 73 72

76 75

77

85

88

83

84

86

AB

Engine-ECU Harness Side Connector

C-137

C-136

C-135

C-134

Terminal
No.

Inspection item

Normal condition (Check condition)

1

-

12

No. 1 injector

13

-

16

W

(At 20

•

C)

12

-

14

No. 2 injector

2

-

12

No. 3 injector

12

-

15

No. 4 injector

4

-

12

Stepper motor coil (A1)

26

-

33

W

(At 20

•

C)

12

-

17

Stepper motor coil (A2)

5

-

12

Stepper motor coil (B1)

12

-

18

Stepper motor coil (B2)

6

-

12

EGR control solenoid valve

29

-

35

W

(At 20

•

C)

9

-

12

Purge control solenoid valve

29

-

35

W

(At 20

•

C)

12

-

54

Oxygen sensor heater(rear)

11

-

18

W

(At 20

•

C)

12

-

60

Oxygen sensor heater(front)

4.5

-

8.0

W

(At 20

•

C)

13

-

Body

earth

ECU earth

Continuity (0

W

)

26

-

Body

earth

81

-

83

Engine coolant temperature sensor

14

-

17 k

W

(When coolant temperature is

-

20

•

C)

5.1

-

6.5 k

W

(When coolant temperature is 0

•

C)

2.1

-

2.7 k

W

(When coolant temperature is 20

•

C)

0.9

-

1.3 k

W

(When coolant temperature is 40

•

C)

0.48

-

0.68 k

W

(When coolant temperature is 60

•

C)

0.26

-

0.36 k

W

(When coolant temperature is 80

•

C)

72

-

81

Intake air temperature sensor

13

-

17 k

W

(When intake air temperature is

-

20

•

C)

5.3

-

6.7 k

W

(When intake air temperature is 0

•

C)

2.3

-

3.0 k

W

(When intake air temperature is 20

•

C)

1.0

-

1.5 k

W

(When intake air temperature is 40

•

C)

0.56

-

0.76 k

W

(When intake air temperature is 60

•

C)

0.30

-

0.42 k

W

(When intake air temperature is 80

•

C)