Mitsubishi Eclipse. Manual - part 313

 

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Mitsubishi Eclipse. Manual - part 313

 

 

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-745

INSPECTION PROCEDURE 3: The Malfunction Indicator Lamp (SERVICE ENGINE SOON or Check 
Engine Lamp) Does Not Illuminate Right after the Ignition Switch Is Turned to the "ON" Position.

AK201266

44 45

41

46 47

42 43

49 50 5152

48

55 56

54

53

3

2

4 5 6

1 2 3
4 5 6

GREEN

1

RED-

YELLO

W

RED-

YELLO

W

BLA

CK-

WHITE

R

IG2

ST

LOCK

ACC

IG1

    C-111
MU801331

IGNITION
SWITCH

Malfunction Indicator Lamp (SERVICE ENGINE SOON or Check Engine Lamp) Circuit

C-87

2

6

25

JUNCTION
BLOCK

52

C-41

41

C-28

MALFUNCTION INDICATOR LAMP 
(SERVICE ENGINE SOON OR 
 CHECK ENGINE LAMP)

C-53 <M/T>

(MU803771)

C-50 <A/T>

(MU803784)

ENGINE CONTROL
MODULE (ECM) <M/T>
OR
POWERTRAIN CONTROL
MODULE (PCM) <A/T>

21

36 <M/T>
22 <A/T>

7 8

5

3 4

35

34

10 11 12

2122 23 24

13 14 15

25 26 27

16

28

17

18 19 20

29

30 31

32 33

36 37

38

9

1 2

6

34

33

32

36

35

37

42

45

31

39

38

46

40 41

43 44

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

3132 33

34 35

1

10

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

23

7.5A

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-746

.

CIRCUIT OPERATION

• The malfunction indicator lamp (SERVICE 

ENGINE SOON or Check Engine Lamp) power is 
supplied from the ignition switch.

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

ground of the malfunction indicator lamp (SER-
VICE ENGINE SOON or Check Engine Lamp) by 
turning the power transistor in the ECM <M/T> or 
PCM <A/T> ON and OFF.

.

COMMENT

• The ECM <M/T> or PCM <A/T> causes the mal-

function indicator lamp (SERVICE ENGINE 
SOON or Check Engine Lamp) to illuminate for 5 
seconds immediately after the ignition switch is 
turned to the "ON" position occurred.

.

AK300072

CONNECTOR: C-41

AB

C-41 (B)

AK300119

CONNECTOR: C-28

AB

C-28

AK300124

CONNECTOR: C-111

AB

C-111

AK300060

ECM

CONNECTOR: C-53 <M/T>

AH

C-53 (G)

AK300060AD

C-50 (GR)

PCM

CONNECTOR: C-50 <A/T>

AK300123

CONNECTOR: C-108

AB

C-108

AK300116

CONNECTOR: C-87

AB

C-87

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-747

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

• Malfunction of the malfunction indicator lamp 

(SERVICE ENGINE SOON or Check Engine 
Lamp).

• Defective malfunction indicator lamp (SERVICE 

ENGINE SOON or check engine lamp) circuit.

DIAGNOSIS

Required Special Tools:

• MB991958 (MUT-III Sub Assembly)

• MB991824: V.C.I.

• MB991827: USB Cable

• MB991911: Main Harness B

STEP 1. Using scan tool MB991958, check data list item 16: 
Power Supply Voltage.

CAUTION

To prevent damage to scan tool MB991958, always turn the 
ignition switch to the "LOCK" (OFF) position before. con-
necting or disconnecting scan tool MB991958.
(1)  Connect scan tool MB991958 to the data link connector.
(2)  Turn the ignition switch to the "ON" position.
(3) Set scan tool MB991958 to the data reading mode for item 

16, Power Supply Voltage.

• 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 2.
NO :  Refer to INSPECTION PROCEDURE 29 

− Power 

Supply System and Ignition Switch 

− IG System 

P.13A-837

.

STEP 2. Check the burned-out bulb.
Q: Is the valve normal?

YES :  Go to step 3.
NO :   Replace the bulb. Then confirm that the malfunction 

symptom is eliminated.

AK300810

AB

MB991911

16-PIN

MB991827

MB991824 

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-748

STEP 3. Check connector C-41 at the combination meter 
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.

STEP 4. Measure the power supply voltage at combination 
meter harness side connector C-41.
(1) Disconnect the connector C-41 and measure at the harness 

side.

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

(3) Measure the voltage between terminal No. 52 and ground.

• Voltage should be battery positive voltage.

(4)  Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the voltage normal?

YES : Go to Step 5.
NO :  Check harness connectors C-108 and C-111 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 ignition switch connector C-87 (terminal No. 
2) and combination meter connector C-41 (terminal 
No. 52) because of open circuit. Then confirm that the 
malfunction symptom is eliminated.

AK300741

44

45

41

46

47

42

43

49

50

51

52

48

55

56

54 53

CONNECTOR: C-41

AB

C-41 (B)

HARNESS CONNECTOR:
COMPONENT SIDE

AK300741

44

45

41

46

47

42

43

49

50

51

52

48

55

56

54 53

CONNECTOR: C-41

AB

C-41 (B)

HARNESS CONNECTOR:
COMPONENT SIDE

AK000364AE

56 55 54 53 52 5150 49 48

47 46 45 44 43 42 41

C-41 HARNESS 
CONNECTOR: 
COMPONENT SIDE

 

 

 

 

 

 

 

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