Mitsubishi Outlander (2003+). Manual — part 92

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MFI)

13A-231

STEP 6. Check harness between A-20 (terminal
No. 2) fan controller connector and C-134
(terminal No. 21) engine-ECU connector.

NOTE: Before checking harness, check intermediate
connector A-14, and repair if necessary.

œ

Check output line for open circuit.

Q: Is the check result normal?

YES :

Replace fan controller.

NO :

Repair.

Inspection Procedure 22: Poor A/C Performance

COMMENT ON TROUBLE SYMPTOM

œ

Failure is possibly caused by short /overcharged
A/C refrigerant, failed A/C control system, failed
fan control system or other faults.

PROBABLE CAUSE

œ

Short or overcharged A/C refrigerant

œ

Failed A/C compressor relay

œ

Failed fan controller

œ

Failed A/C-ECU

œ

Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1. MUT-II self-diag code

Q: Diagnosis code set?

YES :

Inspection chart for diagnosis code (Refer

to

3

13A

).

NO :

Go to Step 2 .

AK203423

1

2

3

Harness side
connector

A-20 (GR)

AC

Connector: A-20

AK300257

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

AB

CONNECTOR: C-134

C-134

Harness side connector

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MFI)

13A-232

STEP 2. A/C compressor magnet clutch
operation check.

œ

Engine: Idling

œ

A/C set temperature:
Maximum Cool when temperature in cabin is

25

•

C or more

Maximum Hot when temperature in cabin is 25

•

C

or less

OK:

Magnet clutch active (when A/C is ON)
Magnet clutch inactive (when A/C is OFF)

Q: Is the check result normal?

YES :

Go to Step 5 .

NO :

Go to Step 3 .

STEP 3. MUT-II data list

œ

Item 28: A/C switch

a. Engine: Idling
b. A/C set temperature:

Maximum Cool when temperature in cabin is

25

•

C or more

Maximum Hot when temperature in cabin is

25

•

C or less

OK:

ON (when A/C is ON)
OFF (when A/C is OFF)

Q: Is the check result normal?

YES :

Go to Step 4 .

NO :

Check A/C switch (Refer to Inspection
Procedure 26

3

13A

).

STEP 4. MUT-II data list

œ

Item 49: A/C relay

a. Engine: Running at idle
b. A/C set temperature:

Maximum Cool when temperature in cabin is

25

•

C or more.

Maximum Hot when temperature in cabin is

25

•

C or less.

OK:

ON (when A/C is ON)
OFF (when A/C is OFF)

Q: Is the check result normal?

YES :

Check A/C system (Refer to GROUP 55A

-

Troubleshooting

3

55A

).

NO :

Check A/C compressor relay (Refer to
inspection procedure 27

3

13A

).

STEP 5. Check charged amount of A/C
refrigerant.

œ

Check charged amount of A/C refrigerant (Refer
to GROUP 55A

-

On-vehicle Service

3

55A



).

Q: Is the check result normal?

YES :

Go to Step 6 .

NO :

Adjust charged amount of A/C refrigerant.

STEP 6. MUT-II actuator test

œ

Item 21: Fan controller

OK: Fan motor rotates.

Q: Is the check result normal?

YES :

Check A/C load signal system (Refer to

Inspection Procedure 28

3

13A

).

NO :

Check fan control relay system (Refer to
Inspection Procedure 25

3

13A

).

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MFI)

13A-233

Inspection Procedure 23: Engine-ECU Power Supply, Engine Control Relay, Ignition Switch-IG1
System

AK300310

2 3

4 5 6

1

34

33

32

36

35

37

42

45

31

39

38

46

40 41

43 44

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

82

78

81

80

89 90 9192

79

87

71

74

73

72

76

75

77

85

88

83 84

86

1

2

3

4

R

IG2

ST

LOCK

ACC

IG1

9

20A

8

7.5A

Battery

C-303

Ignition switch

2

6

1

J/B

82

C-106

C-202

80

Engine
control
relay

B-17X

4

3

1

4

10

9

2

38

Battery
backup

25

12

J/C (2)
C-17

Power
source

Engine-ECU

10

5

A-14

Relay box

W

W-B

W-B

W-B

W-B

W-B

L-B

L-B

L-B

Y-G

R

R

R

Power supply and ignition switch-IG circuit

C-134

C-135

C-137

AB

Wire colour code
B: Black LG: Light green G: Green L: Blue W: White Y: Yellow SB: Sky blue BR: Brown O: Orange GR: Gray
R: Red P: Pink V:Violet

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MFI)

13A-234

OPERATION

œ

The battery voltage is applied to the engine con-
trol relay (terminal No. 3 and 4).

œ

The engine-ECU (terminal No. 38) makes the
power transistor in the unit be in "ON" position
and makes currents go on the engine control
relay coil, and that makes the relay be in "ON"
position.

œ

When the engine control relay is in "ON" position,
the battery voltage is supplied to the engine-
ECU, the sensor and the actuator from the
engine control relay (terminal No. 1).

FUNCTION

œ

When the ignition switch ON signal is input to the
engine-ECU, the engine-ECU places the engine
control relay in the ON position. Accordingly, the
battery voltage is supplied to the engine-ECU,
sensor and actuator.

PROBABLE CAUSE

œ

Failed engine control relay

œ

Open/short circuit in engine control relay circuit or
loose connector contact

œ

Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1. Check battery voltage.

œ

Measure battery voltage during cranking.

OK: 8 V or more

Q: Is the check result normal?

YES :

Go to Step 2 .

NO :

Check battery (Refer to GROUP 54

-

Battery

-

On-vehicle Service

-

Battery test

3

54A

).

STEP 2. Connector check: B-17X engine control
relay connector

Q: Is the check result normal?

YES :

Go to Step 3 .

NO :

Repair.

STEP 3. Check engine control relay.

œ

Check engine control relay (Refer to

3

13A

).

Q: Is the check result normal?

YES :

Go to Step 4 .

NO :

Replace engine control relay.

STEP 4. Measure voltage at B-17X engine control
relay connector.

œ

Remove relay, and measure at relay box side.

œ

Voltage between terminal No. 3 and earth, also
between terminal No. 4 and earth.

OK: System voltage

Q: Is the check result normal?

YES :

Go to Step 5 .

NO :

Check intermediate connector A-14, and

repair if necessary. If intermediate
connector is normal, check and repair
harness between B-17X (terminal No. 4)
engine control relay connector and battery.

œ

Check power supply line for
open/short circuit.

AK300255

2

1

3

4

Relay box’s
triangle marks

AB

CONNECTOR: B-17X

B-17X

Harness side
connector

AK300255

2

1

3

4

Relay box’s
triangle marks

AB

CONNECTOR: B-17X

B-17X

Harness side
connector