Mitsubishi Eclipse. Manual - part 616

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-1007

(4) Measure the voltage between terminal No. 65 <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) or 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

.

AK000366AD

47 46 45

41

42

43

44

48

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

<M/T>

C-58 HARNESS CONNECTOR:
COMPORNENT SIDE 

AK000367AD

<A/T>

C-55 HARNESS CONNECTOR:
COMPORNENT SIDE 

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-1008

INSPECTION PROCEDURE 28: Fans (radlator fan, A/C condenser fan) are inoperative

AK101635

2 3

1

5

1

4

8

7

2

6

3

BLUE-

ORANGE

BLUE-

ORANGE

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

FAN CONTROLLER

      A-30
(MU802322)

     C-07
MU801333

2

6

18

C-51 <M/T>, C-52 <A/T>
         (MU803784)

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

3132 33

34 35

1

10

5 V

Radiator Fan, A/C Condenser Fan Circuit

AK300244

CONNECTOR: C-52 <A/T>

AC

PCM

C-52 (GR)

AK300091

CONNECTOR: C-51 <M/T>

ECM

AF

C-51 (GR)

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-1009

.

CIRCUIT OPERATION

• The PCM sends a duty signal to the fan controller 

according to engine coolant temperature, vehicle 
speed, and the condition of the A/C switch. (The 
closer the average voltage 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. 

AK300114

CONNECTOR: A-30

FAN
CONTROLLER

AB

A-30 (GR)

AK300092

CONNECTOR: C-07

AB

C-07

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-1010

DIAGNOSIS

STEP 1. Check connector C-51 at ECM <M/T> or connector 
C-52 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.

AK300458

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

CONNECTOR: C-52 <A/T>

C-52 (GR)

AB

HARNESS CONNECTOR:
COMPONENT SIDE

AK300443

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

CONNECTOR: C-51 <M/T>

C-51 (GR)

AB

HARNESS CONNECTOR:
COMPONENT SIDE