Mitsubishi Lancer Evolution X. Manual - part 432

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-793

STEP 20. Check harness connector B-109 at starter 
connector for damage.
Q: Is the connector in good condition?

YES : Go to Step 21.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then confirm that the 

malfunction symptom is eliminated.

STEP 21. Measure the power supply voltage at starter 
harness side connector B-109.
(1) Disconnect the connector B-109 and measure at the 

harness side.

(2) Turn the ignition switch to the "START" 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 26.
NO :  Go to Step 22.

STEP 22. Measure the power supply voltage at starter relay 
harness side connector A-28X.
(1) Disconnect the connector A-28X and measure at the 

harness side.

(2) Measure the voltage between terminal No. 4 and ground.

• Voltage should be battery positive voltage

Q: Is battery positive voltage (approximately 12 volts) 

present?
YES : Go to Step 23.
NO :  Repair harness wire between fusible link (24) and 

starter relay connector A-28X (terminal No. 4) 
because of open circuit or short circuit to ground. 
Then confirm that the malfunction symptom is 
eliminated.

AK704593

1

B-109 harness
connector:
component side

AB

2

1

3
4

AK700519AC

A-28X harness
connector:
component side

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-794

STEP 23. Check for open circuit and short circuit to 
ground between starter relay connector A-28X (terminal 
No. 3) and starter connector B-109 (terminal No. 1)
NOTE: Check harness after checking intermediate connectors 
A-39 and B-17. If intermediate connectors are damaged, repair 
or replace them. Refer to GROUP 00E, Harness Connector 
Inspection 

P.00E-2

. Then check that the malfunction is elimi-

nated.
Q: Is the harness wire in good condition?

YES : Go to Step 24.
NO :  Repair it. Then confirm that the malfunction symptom 

is eliminated.

STEP 24. Check harness connector B-10 at ECM connector 
and harness connector C-51 at clutch interlock switch 
connector for damage.
Q: Is the connector in good condition?

YES : Go to Step 25.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then confirm that the 

malfunction symptom is eliminated.

STEP 25. Check for harness damage between ECM 
connector B-10 (terminal No. 106) and clutch interlock 
switch connector C-51 (terminal No. 2).
Q: Is the harness wire in good condition?

YES : Repair harness wire between clutch interlock switch 

connector C-51 (terminal No. 2) and starter relay 
connector A-28X (terminal No. 2) because of harness 
damage. Then confirm that the malfunction symptom 
is eliminated.

NO :  Repair it. Then confirm that the malfunction symptom 

is eliminated.

STEP 26. Check for harness damage between starter relay 
connector A-28X (terminal No. 3) and starter connector 
B-109 (terminal No. 1)
NOTE: Check harness after checking intermediate connectors 
A-39 and B-17. If intermediate connectors are damaged, repair 
or replace them. Refer to GROUP 00E, Harness Connector 
Inspection 

P.00E-2

. Then check that the malfunction is elimi-

nated.
Q:  Is the harness wire in good condition?

YES : Go to Step 27.
NO :  Repair it. Then confirm that the malfunction symptom 

is eliminated.

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-795

STEP 27. Check for harness damage between fusible link 
(24) and starter relay connector A-28X (terminal No. 4)
Q: Is the harness wire in good condition?

YES : Go to Step 28.
NO :  Repair it. Then confirm that the malfunction symptom 

is eliminated.

STEP 28. Check harness connector B-108 at starter 
connector for damage.
Q: Is the connector in good condition?

YES : Go to Step 29.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then confirm that the 

malfunction symptom is eliminated.

STEP 29. Check for open circuit and short circuit to 
ground and harness damage between battery and starter 
connector B-108 (terminal No. 1)
Q: Is the harness wire in good condition?

YES : Replace the starter.
NO :  Repair it. Then confirm that the malfunction symptom 

is eliminated.

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-796

Inspection procedure 25: Ignition switch-ST system and starter relay system <TC-SST>

M

1

2

3
4

7

3

8

1

4

9

13 14

16

15

10 11 12

17 18 19

2

5 6

1

6

4

5

9

8

10 11

13

15

14

12

16

7

2 3

1 2 3
4 5 6

AK900380

1

1 2 3 4

5 6 7

12

11

10

15 16

14

13

9

8

71 72 73 74 75 76 77 78 79 80 81 82

83 84 85 86 87 88 89 90 91 92 93 94

95 96 97 98 99

100 101 102 103 104

112 113 114

109

108

107

110 111

115 116

106

105

118

117

1

1

1 2 3

4 5 6

1

12 13 14 15 16 1718 19 20 2122 2324

2 3 4 5

6 7 8 9 10 11

1

2

3 4 5 6 7 8 9 10 11 12 13 14 15 16

17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32

33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48

49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64

OFF

ON

OFF

ON

OFF

ON

1

OFF

ON

7

106

B-09

105

15

7

C-304

ENGINE
CONTROL
MODULE

B-10

ETACS-ECU

16

J/C (7)

5

17

18

15

IG2

ST

LOCK

ACC

IG1

5

B-109 

(MU801211)

C-27

C-50

STARTER

STARTER
RELAY

B-108

A-28X

3

3

1

4

6

6

2

BLA

CK-RED

BLUE-RED

WHITE

GREEN

GREEN

ORANGE

LIGHT

GREEN

C-315 

MU801890

C-210

IGNITION SWITCH

STARTING SYSTEM CIRCUIT <TC-SST>

AB

BATTERY

FUSIBLE LINK 24

1

GREEN

B-17

MU802655

A-39

MU802607

1

BLA

CK

BLA

CK

BLA

CK

BLA

CK

BLA

CK-RED

BLA

CK-

RED

BLA

CK-

RED

BLUE-
RED

BLACK-RED

LEVER
POSITION 
SWITCH (N)

LEVER
POSITION 
SWITCH (P)

SHIFT
LEVER