Mitsubishi Eclipse. Manual - part 625

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-1043

INSPECTION PROCEDURE 31: Ignition Switch 

− ST System. <M/T>

AK101638

4 5 6

1 2 3

BL

ACK

-

RED

BL

ACK

-

RED

BL

ACK

-

RED

BL

ACK

-

RED

8

7

2

6

3

5

1

BL

ACK

-RED

4

BL

ACK

GREEN-

BL

ACK

GREEN-

BL

ACK

A-13X

5

2

3

1

STARTER
RELAY

LOCK

ACC

C-87

R

IGNITION
SWITCH

IG2

IG1

ST

5

     C-58
(MU803782)

68

16

2

2

INTERLOCK
SWITCH

C-02

1

OFF

ON

ENGINE CONTROL
MODULE (ECM)

C-07

C-28

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

65

43
50

42
49

41

48
60 61

64

46 47
58 59
67 68

45

56
66

52

51

44

53

62

54

63

57

55

1 2

Ignition Switch-ST Circuit

3

4
5

1 2

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-1044

.

CIRCUIT OPERATION

• The battery positive voltage is supplied to the 

ECM (terminal No. 68) via the starter relay during 
engine cranking. With this, the ECM detects that 
the engine is being cranked.

.

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

• Malfunction of the ignition switch.

• Malfunction of the starter relay.

• Improper connector contact, open circuit or 

short-circuited harness wire.

• Malfunction of the ECM.

AK300122

STARTER RELAY

CONNECTOR: A-13X

AB

A-13X

AK300119

CONNECTOR: C-28

AB

C-28

AK300091

CONNECTOR: C-58 <M/T>

ECM

AC

C-58 (GR)

AK300092

CONNECTOR: C-07

AB

C-07

AK300116

CONNECTOR: C-87

AB

C-87

AK300095

CONNECTOR: C-02

AB

C-02

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-1045

DIAGNOSIS

STEP 1. Check connector A-13X at starter relay for 
damage.
Q: Is the connector in good condition?

YES : Go to Step 2.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then confirm that the 

malfunction symptom is eliminated.

STEP 2. Check the starter relay.
Refer to GROUP 16, Starting system 

− On-vehicle Service − 

Starter relay check 

P.16-25

.

Q: Are there any abnormalities?

YES : Go to Step 3.
NO :  Repair or replace it. Then confirm that the malfunction 

symptom is eliminated.

STEP 3. Check the power supply voltage at starter relay 
connector A-13X.
(1) Disconnect the connector A-13X and measure at the 

harness side.

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

(3) Measure the voltage between terminal No. 3, No. 5 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 4.
NO :  Repair harness wire between ignition switch 

connector C-87 terminal No. 5 and starter relay 
connector A-13X terminal No. 3, No. 5 because of 
open circuit. Then confirm that the malfunction 
symptom is eliminated.

AK300455

1

2

3

4
5

CONNECTOR: A-13X

AB

A-13X

HARNESS CONNECTOR:
COMPONENT SIDE

AK300455

1

2

3

4
5

CONNECTOR: A-13X

AB

A-13X

HARNESS CONNECTOR:
COMPONENT SIDE

AK101400

3

4
5

1

2

AC

A-13X HERNESS 
CONNECTOR: 
COMPONENT SIDE

3

4
5

1

2

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-1046

STEP 4. Check connector C-58 at ECM 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.

STEP 5. Check the power supply voltage at ECM connector 
C-58.
(1) Disconnect the connector C-58 and measure at the harness 

side.

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

(3) Measure the voltage between terminal 68 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 :  Repair harness wire between starter relay connector 

A-13X (terminal No. 2) and ECM connector C-58 
(terminal No. 68) because of open circuit. Then 
confirm that the malfunction symptom is eliminated.

AK300748

65

43
50

42
49

41
48
60

61

64

46

47

58

59

67

68

45

56
66

52 51

44

53

62

54

63

57

55

CONNECTOR: C-58 <M/T>

AB

C-58 (GR)

HARNESS CONNECTOR:
COMPONENT SIDE

AK300748

65

43
50

42
49

41
48
60

61

64

46

47

58

59

67

68

45

56
66

52 51

44

53

62

54

63

57

55

CONNECTOR: C-58 <M/T>

AB

C-58 (GR)

HARNESS CONNECTOR:
COMPONENT SIDE

AK000383AE

47 46 45

41

42

43

44

48

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

C-58 HARNESS 
CONNECTOR: 
COMPONENT SIDE