Mitsubishi Eclipse. Manual - part 335

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-833

STEP 2. Measure the output voltage at ECM harness side 
connector C-49 <M/T> or PCM harness side connector 
C-50 <A/T>.
(1) Disconnect the connector C-49 <M/T> or C-50 <A/T> and 

measure at the harness side.

(2) Turn the ignition switch to the "ON" position.

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

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11

12

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18

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20

30

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22

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31

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34

35

1

10

C-50 (GR)

CONNECTOR: C-50 <A/T>

AB

HARNESS CONNECTOR:
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-834

(3) Measure the voltage between terminal No. 21 <M/T> or No. 

18 <A/T> and ground.

• Voltage should be between 4.8 and 5.2 volts. (Fan 

rotates at high speed.)

(4) Connect a jumper cable between terminal No. 21 <M/T> or 

No. 18 <A/T> and ground.

• The fan should stop.

(5) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the voltage and fan condition normal?

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

malfunction symptom is eliminated.

NO :  Go to Step 3.

AK000400AI

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2

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18

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21

22

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24

25

26

<M/T>

C-49 HARNESS 
CONNECTOR: 
COMPONENT SIDE

AK000401AK

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2

3

4

5

6

7

8

9

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21

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35

<A/T>

C-50 HARNESS 
CONNECTOR: 
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-835

STEP 3. Check for open circuit and short circuit to ground 
and harness damage between fan controller A-30 (terminal 
No. 2) and ECM connector C-49 (terminal No. 21) <M/T> or 
PCM connector C-50 (terminal No. 18) <A/T>.

AK300451

1

2

3

CONNECTOR: A-30

AB

A-30 (GR)

HARNESS 
CONNECTOR:
COMPONENT SIDE

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

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-836

NOTE: Check harness after checking intermediate connector 
C-07. If intermediate connector is damaged, repair or replace 
them. Refer to GROUP 00E, Harness Connector Inspection 

P.00E-2

. Then confirm that the malfunction symptom is elimi-

nated.
Q: Is the harness wire in good condition?

YES : Refer to GROUP 14 

− Engine Cooling Diagnosis − 

Symptom Chart 

P.14-3

.

NO :  Repair it. Then confirm that the malfunction symptom 

is eliminated.