Mitsubishi Eclipse. Manual - part 334

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-829

(4) Measure the voltage between terminal No. 24 <M/T> or No. 

61 <A/T> and ground.

• If atmospheric air temperature is 15°C (59°F) or less, 

the voltage should be 1 volt or less.

• If atmospheric air temperature is 18°C (65.4°F) more, 

the voltage should be battery positive voltage.

(5) Turn the A/C switch "OFF".
(6) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the voltage normal?

YES :  Replace the ECM or PCM. Then confirm that the 

malfunction symptom is eliminated.

NO :  Refer to GROUP 55, Introduction To Heater, Air 

Conditioning And Ventilation Diagnosis 

P.55-4

.

AK000390AI

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

<M/T>

C-49 HARNESS
CONNECTOR:
COMPONENT SIDE

AKX01505

C-54  HARNESS
CONNECTOR:
COMPONENT SIDE

<A/T>

46 45 44

57 56 55

66 65 64

54 53 52 51 50 49

48

47

43 42

41

63 62 61 60

59

58

AM

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-830

INSPECTION PROCEDURE 28: Fans (radlator fan) is inoperative

AK000678

2 3

1

5

1

4

8

7

2

6

3

BL

UE-ORANGE

BL

UE-ORANGE

ENGINE CONTROL
MODULE (ECM) <M/T>
OR
POWERTRAIN CONTROL
MODULE (PCM) <A/T>

FAN CONTROLLER

5V

      A-30
(MU802322)

     C-07
MU801333

2

6

21 <M/T>
18 <A/T>

6

17

8

15

9

18

7

20

16

2

10

13

12

23 24 25 26

11

21

3

1

14

4

12

11

16

5 6

7 8

21

13
27

14
28

15
29

17
30

18
31

19
32

20
33

22
34

23
35

1

24

3

26

9

2

25

10

19

5

4

22

C-49 <M/T>
(MU803773)

C-50 <A/T>
(MU803784)

Radiator fan, A/C condenser fan Circuit

AK300060

ECM

CONNECTOR: C-49 <M/T>

AC

C-49 (G)

AK300060AD

C-50 (GR)

PCM

CONNECTOR: C-50 <A/T>

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-831

.

CIRCUIT OPERATION

• The ECM <M/T> or PCM <A/T> sends a duty sig-

nal to the fan controller according to engine cool-
ant temperature, vehicle speed, and the condition 
of the A/C switch. (The closer the average volt-
age at the terminal comes to five volts, the higher 
the fan speed becomes.)

.

TROUBLESHOOTING HINTS (The most likely 
causes for this code to be set are: ) 

• Malfunction of the fan motor relay.

• Malfunction of the fan motor.

• Malfunction of the fan controller.

• Improper connector contact, open or 

short-circuited harness wire.

• ECM <M/T> or PCM <A/T> failed. 

AK300092

CONNECTOR: C-07

AB

C-07

AK300114

CONNECTOR: A-30

FAN
CONTROLLER

AB

A-30 (GR)

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-832

DIAGNOSIS

STEP 1. Check connector C-49 at ECM <M/T> or connector 
C-50 at PCM <A/T> for damage.
Q: Is the connector in good condition?

YES :  Go to Step 2.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then confirm that the 

malfunction symptom is eliminated.

AK300413

1

14

4

19

5

22

6

17

8

15

9

18

7

20

16

2

21

23

26

24

25

3

10

11

12

13

CONNECTOR: C-49 <M/T>

C-49 (G)

AB

HARNESS CONNECTOR:
COMPONENT SIDE

AK300414

2

3

4

5

6

7

8

9

11

12

13

14

15

16

17

18

19

20

30

21

22

23

24

25

26

27

28

29

31

32

33

34

35

1

10

C-50 (GR)

CONNECTOR: C-50 <A/T>

AB

HARNESS CONNECTOR:
COMPONENT SIDE