Mitsubishi Eclipse. Manual - part 481

 

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Mitsubishi Eclipse. Manual - part 481

 

 

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-467

STEP 8. Check the left bank injector.
(1) Disconnect the left bank injector connector B-02, B-06, 

B-25.

(2) Measure the resistance between each injector side 

connector terminal No. 1 and No. 2.

 Standard value: 13 

 16 ohms [at 20°C (68°F)]

Q: Is the resistance between 13 and 16 ohms?

YES : Go to Step 9.
NO :  Replace the faulty injector. Then go to Step 14.

AK300753

1

2

CONNECTORS: B-02, B-06, B-25

AB

B-02 (GR)

B-06 (GR) B-25 (GR)

HARNESS CONNECTOR:
COMPONENT SIDE

AK000241

INJECTOR SIDE
CONNECTOR

1 2

AB

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-468

STEP 9. 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 10.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then go to Step 14.

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-469

STEP 10. Check for harness damage between left bank 
injector connector and ECM connector <M/T> or PCM 
connector <A/T>.

a. Check the harness wire between injector connector B-02 

(terminal No. 2) and ECM connector C-51 (terminal No. 9) 
<M/T> or PCM connector C-52 (terminal No. 9) <A/T> when 
checking No. 2 cylinder injector.

b. Check the harness wire between injector connector B-06 

(terminal No. 2) and ECM connector C-51 (terminal No. 2) 
<M/T> or PCM connector C-52 (terminal No. 2) <A/T> when 
checking No. 4 cylinder injector.

c. Check the harness wire between injector connector B-25 

(terminal No. 2) and ECM connector C-51 (terminal No. 25) 
<M/T> or PCM connector C-52 (terminal No. 25) <A/T> 
when checking No. 6 cylinder injector.

Q: Is the harness wire in good condition?

YES : Go to Step 11.
NO :  Repair it. Then go to Step 14.

STEP 11. Check the fuel pressure.
Refer to Fuel Pressure Test 

P.13B-1106

.

Q: Is the fuel pressure normal?

YES : Go to Step 12.
NO :  Repair or replace it. Then go to Step 14.

AK300753

1

2

CONNECTORS: B-02, B-06, B-25

AB

B-02 (GR)

B-06 (GR) B-25 (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

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-470

STEP 12. Check for entry of foreign matter (water, 
kerosene, etc.) into fuel.
Q: Are there any abnormalities?

YES : Go to Step 13.
NO :  Replace the fuel. Then go to Step 14.

STEP 13. Replace the left bank injector.
(1) Replace the left bank injector.
(2) Carry out a test drive with the drive cycle pattern. Refer to 

Diagnostic Function 

− OBD-II Drive Cycle − Procedure 2 − 

Fuel Trim Monitor 

P.13B-7

.

(3) Check the diagnostic trouble code (DTC).
Q: Is DTC P0174 set?

YES : Replace the ECM or PCM. Then go to Step 14.
NO :  The inspection is complete.

STEP 14. 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 2 − 

Fuel Trim Monitor 

P.13B-7

.

(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0174 set?

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

DTC P0175: System too Rich (bank 2)

.

System too Rich (bank 2) Circuit

• Refer to DTC P0202, P0204, P0206 − Injector 

Circuit 

P.13B-521

.

.

CIRCUIT OPERATION

• Refer to DTC P0202, P0204, P0206 − Injector 

Circuit 

P.13B-521

.

.

TECHNICAL DESCRIPTION

• If a malfunction occurs in the fuel system, the fuel 

trim value becomes too small.

• The ECM <M/T> or PCM <A/T> checks whether 

the fuel trim value is within a specified range.

.

DESCRIPTIONS OF MONITOR METHODS
Left bank air/fuel learning value (long time fuel trim) 

and air/fuel feedback integral value (short time 
fuel trim) are too rich.

.

MONITOR EXECUTION
Continuous

.

MONITOR EXECUTION CONDITIONS (Other 
monitor and Sensor)

Other Monitor (There is no temporary DTC stored 

in memory for the item monitored below)

• Misfire monitor

Sensor (The sensor below is determined to be 

normal)

• Volume airflow sensor

• Engine coolant temperature sensor 

• Intake air temperature sensor

• Barometric pressure sensor

• Throttle position sensor

.

AK300753

1

2

CONNECTORS: B-02, B-06, B-25

AB

B-02 (GR)

B-06 (GR) B-25 (GR)

HARNESS CONNECTOR:
COMPONENT SIDE

 

 

 

 

 

 

 

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