Mitsubishi Eclipse. Manual - part 241

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-457

STEP 2. Check connector B-31 at the EGR vacuum 
regulator solenoid valve for damage.
Q: Is the connector in good condition?

YES : Go to Step 3.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then go to Step 12.

STEP 3. Check the EGR vacuum regulator solenoid valve.
(1) Disconnect the EGR vacuum regulator solenoid valve 

connector B-31.

(2) Measure the resistance between EGR vacuum regulator 

solenoid valve side connector terminal No. 1 and No. 2.

   Standard value: 29 

− 35 ohms [at 20°C (68°F)]

Q: Is the resistance between 29 and 35 ohms?

YES : Go to Step 4.
NO :  Replace the EGR vacuum regulator solenoid valve. 

Then go to Step 12.

AK300406

1

2

CONNECTOR: B-31

AB

B-31 (BR)

HARNESS CONNECTOR:
COMPONENT SIDE

AK300406

1

2

CONNECTOR: B-31

AB

B-31 (BR)

HARNESS CONNECTOR:
COMPONENT SIDE

AKX00352

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-458

STEP 4. Measure the power supply voltage at EGR vacuum 
regulator solenoid valve harness side connector B-31.
(1) Disconnect the connector B-31 and measure at the harness 

side.

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

(3) Measure the voltage between terminal No. 1 and ground.

• Voltage should be battery positive voltage.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is battery positive voltage (approximately 12 volts) 

present?
YES : Go to Step 6.
NO :  Go to Step 5.

STEP 5. Check connector A-18X at MFI relay for damage.
Q: Is the connector in good condition?

YES : Check connector B-13 at intermediate connector for 

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

P.00E-2

. If intermediate connectors is in good 

condition, repair harness wire between MFI relay 
connector A-18X (terminal No. 4) and EGR vacuum 
regulator solenoid valve connector B-101 (terminal 
No. 1) because of open circuit or short circuit to 
ground. 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.

AK300406

1

2

CONNECTOR: B-31

AB

B-31 (BR)

HARNESS CONNECTOR:
COMPONENT SIDE

AK000254AN

B-31 HARNESS 
CONNECTOR: 
COMPONENT SIDE

2 1

AK300454

2

1

3

4

CONNECTOR: A-18X

AB

A-18X

HARNESS CONNECTOR:
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-459

STEP 6. Measure the power supply voltage at ECM 
connector C-49 <M/T> or PCM connector C-50 <A/T> by 
backprobing.
(1) Do not disconnect the connector C-49 <M/T> or C-50 

<A/T>.

(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

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-460

(3) Measure the voltage between terminal No. 6 and ground by 

backprobing.

• Voltage should be battery positive voltage.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is battery positive voltage (approximately 12 volts) 

present?
YES : Go to Step 9.
NO :  Go to Step 7.

AK000298

10

1 2 3 4 5 6 7 8 9

1112 13

141516171819 20 2122 23242526

AH

<M/T>

C-49 HARNESS 
CONNECTOR: 
HARNESS SIDE

AK000299

1

2

3 4

5 6

7 8

9 10 111213 1415 16 17 18 19 20 21 22 23

24 25

26 27 28 29

30 313233

34 35

AK

C-50 HARNESS 
CONNECTOR: 
HARNESS SIDE

<A/T>