Mitsubishi Eclipse. Manual - part 591

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-907

STEP 10. Check connector B-14 at barometric pressure 
sensor for damage.
Q: Is the connector in good condition?

YES : Go to Step 11.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then go to Step 12.

STEP 11. 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 : Replace the volume airflow sensor. Then go to Step 

12.

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

Connector Inspection 

P.00E-2

. Then go to Step 12.

AK300078

3

4

5

1

2

6

7

CONNECTOR: B-14

AB

B-14 (B)

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

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

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-908

STEP 12. Test the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to 

Diagnostic Function 

− OBD-II Drive Cycle − Procedure 6 − 

Other Monitor 

P.13B-7

.

(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P2229 set?

YES : Retry the troubleshooting.
NO :  The inspection is complete.

SYMPTOM PROCEDURES

INSPECTION PROCEDURE 1: Communication with Scan Tool Is Not Possible. (Comunication with All 
Systems Is Not Possible.)

AK103095

1

RED

RED

RED-BLA

CK

BLA

CK

BLA

CK

FUSIBLE LINK (1)

C-113

DATA LINK
CONNECTOR

38

1

12

16

4

5

JUNCTION
BLOCK

15 16

26 27 28 29

32 33 34

17 18 19 20 21 22 23 24 25

30 31

36 37

35

38

10

11 12 13

1 2 3

4 5 6 7 8 9

14

C-89

15

14

13

12

11

10

1 2 3 4 5 6 7 8
9

16

C-29

Data Link Connector Circuit

1

6

4 5

11

10

1213

15

17

16

14

19

18

8 9

7

20

2 3

2122 23 2425 26 27 28

C-108

15A

10

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-909

.

CIRCUIT OPERATION

• A battery positive voltage is applied on the data 

link connector power terminal (terminal No. 16). 
The ground terminals (terminal No. 4, No. 5) are 
grounded to the vehicle body.

.

COMMENT

• The cause is probably a defect in power supply 

system (including ground) for the on-board diag-
nostic test mode line.

.

TROUBLESHOOTING HINTS (The most likely 
causes for this case: ) 

• Malfunction of the data link connector.

• Damaged harness wire.

AK300113

CONNECTOR: C-29

ACCELERATOR
PEDAL

DATA  LINK
CONNECTOR

AB

C-29 (B)

AK300126

CONNECTOR: C-113

AB

C-113 (B)

AK300123

CONNECTOR: C-108

AB

C-108

AK300118

CONNECTOR: C-89

AC

C-89

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-910

DIAGNOSIS

STEP 1. Check the power supply voltage at data link 
connector C-29.
(1) Measure voltage between terminal 16 and ground.

• Voltage should be battery positive voltage.

Q: Is battery positive voltage (approximately 12 volts) 

present?
YES : Go to step 2.
NO :  Check harness connectors C-108, C-113 and C-89 at 

intermediate connector for damage, and repair or 
replace as required. Refer to GROUP 00E, Harness 
Connector Inspection 

P.00E-2

. If intermediate 

connectors are in good condition, repair harness wire 
between fusible link (1) and data link connector C-29 
terminal 16 because of open circuit. Then confirm that 
the malfunction symptom is eliminated.

STEP 2. Check the continuity at data link connector C-29.
(1) Check for the continuity between terminal 4, 5 and ground.

• Should be less than 2 ohms.

Q: Is the continuity normal?

YES :  Replace the scan tool. Then confirm that the 

malfunction symptom is eliminated.

NO :  Repair harness wire between data link connector 

C-29 terminal 4, 5 and ground because of open circuit 
or harness damage. Then confirm that the 
malfunction symptom is eliminated.

AK300450

1 2 3 4 5 6

12

11

10

1516

14

13

9

7 8

CONNECTOR: C-29

AB

C-29 (B)

HARNESS CONNECTOR:
COMPONENT SIDE

AKX01430AP

1 2 3 4 5 6 7 8
9 10 111213141516

C-29 HARNESS 
CONNECTOR: 
COMPONENT SIDE

AK300450

1 2 3 4 5 6

12

11

10

1516

14

13

9

7 8

CONNECTOR: C-29

AB

C-29 (B)

HARNESS CONNECTOR:
COMPONENT SIDE

AKX01431AN

1 2 3 4 5 6 7 8
9 10 111213141516

C-29 HARNESS 
CONNECTOR: 
COMPONENT SIDE