Mitsubishi Eclipse. Manual — part 614

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-999

.

CIRCUIT OPERATION

• The ECM <M/T> or PCM <A/T> controls genera-

tor out put current by duty-controlling continuity
between the generator G terminal (terminal 1)
and ground.

.

TROUBLESHOOTING HINTS (The most likely
causes for this charging system: )

• Malfunction of the charging system.

• Short circuit in the harness between generator G

terminal and ECM <M/T> or PCM <A/T>.

• ECM <M/T> or PCM <A/T> failed.

DIAGNOSIS

STEP 1. Check the voltage at generator connector B-45 by
backprobing.
(1) Do not disconnect the connector B-45.
(2) Start the engine and run at idle.

(3) Measure the voltage between terminal 1 and ground by

backprobing.

a. Engine: warming up
b. Radiator fan: stopped

c. Headlight switch: OFF to ON

d. Rear defogger switch: OFF to ON
e. Stoplight switch: OFF to On

• Voltage rises by 0.2 − 3.5 volts.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage between 0.2 and 3.5 volts?

YES : Go to Step 2.
NO : Go to Step 3.

AK300244

CONNECTOR: C-52 <A/T>

AC

PCM

C-52 (GR)

AK300091

CONNECTOR: C-51 <M/T>

ECM

AF

C-51 (GR)

AK300756

2

1

3

4

CONNECTOR: B-45

AB

B-45 (GR)

HARNESS CONNECTOR:
COMPONENT SIDE

AK103519 AF

1 2 3 4

C-45 HERNESS
CONNECTOR:
HERNESS SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-1000

STEP 2. Check connector B-45 at generator connector for
damage.
Q: Is the connector in good condition?

YES : Replace the generator. Then confirm that the

malfunction symptom is eliminated.

NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then confirm that the

malfunction symptom is eliminated.

STEP 3. Check connector B-45 at generator connector for
damage.
Q: Is the connector in good condition?

YES : Go to Step 4.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then confirm that the

malfunction symptom is eliminated.

AK300756

2

1

3

4

CONNECTOR: B-45

AB

B-45 (GR)

HARNESS CONNECTOR:
COMPONENT SIDE

AK300756

2

1

3

4

CONNECTOR: B-45

AB

B-45 (GR)

HARNESS CONNECTOR:
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-1001

STEP 4. 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 5.
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

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-1002

STEP 5. Check for open circuit and short circuit to ground
and harness damage between generator connector B-45
terminal No. 1 and ECM connector C-51 terminal No. 8
<M/T> or PCM connector C-52 terminal No. 8 <A/T>.

AK300756

2

1

3

4

CONNECTOR: B-45

AB

B-45 (GR)

HARNESS CONNECTOR:
COMPONENT SIDE

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