Mitsubishi Lancer Evolution IX. Manual - part 421

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-159

STEP 7. Check harness between B-117 (terminal 
No. 2) crank angle sensor connector and C-119 
(terminal No. 43) engine-ECU connector.

• Check output line for short circuit.

Q: Is the check result normal? 

YES : 

Go to Step 8 .

NO : 

Repair the damaged harness wire.

STEP 8. M.U.T.-II/III data list

• Refer to Data List Reference Table 

P.13A-372

.

a. Item No. 22: Crank angle sensor 

Q: Is the check result normal? 

YES : 

Intermittent malfunction (Refer to GROUP 

00 

− How to Use 

Troubleshooting/Inspection Service Points 

P.00-5

).

NO : 

Replace the engine-ECU.

STEP 9. Perform voltage measurement at B-117 
crank angle sensor connector.

• Disconnect connector, and measure at harness 

side.

• Ignition switch: "ON" 

• Voltage between terminal No. 3 and earth.

OK: System voltage

Q: Is the check result normal? 

YES : 

Go to Step 11 .

NO : 

Go to Step 10 .

AK305020

1

2

3

AB

Connector : B-117

Harness side 
connector

B-117(B)

Crank angle sensor

AK501994

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

AB

Connector: C-119

C-119 (GR)

C-119 (GR)

Harness side connector

<L. H. drive vehicles>

<R. H. drive vehicles>

AK305020

1

2

3

AB

Connector : B-117

Harness side 
connector

B-117(B)

Crank angle sensor

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-160

STEP 10. Connector check: B-12X engine control 
relay connector

Q: Is the check result normal? 

YES : 

Check and repair harness between B-117 

(terminal No. 3) crank angle sensor 
connector and B-12X (terminal No. 4) 
engine control relay connector.

• Check power supply line for 

open/short circuit.

NO : 

Repair or replace the connector.

STEP 11. Perform resistance measurement at 
B-117 crank angle sensor connector.

• Disconnect connector, and measure at harness 

side.

• Resistance between terminal No. 1 and earth.

OK: 2 

Ω or less

Q: Is the check result normal? 

YES : 

Go to Step 14 .

NO : 

Go to Step 12 .

AK305003

2

1

3

4

AB

Connector : B-12X

B-12X

Harness side 
connector

Relay box’s
triangle marks

AK305020

1

2

3

AB

Connector : B-117

Harness side 
connector

B-117(B)

Crank angle sensor

AK305020

1

2

3

AB

Connector : B-117

Harness side 
connector

B-117(B)

Crank angle sensor

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-161

STEP 12. Connector check: C-121 engine-ECU 
connector

Q: Is the check result normal? 

YES : 

Go to Step 13 .

NO : 

Repair or replace the connector.

STEP 13. Check harness between B-117 (terminal 
No. 1) crank angle sensor connector and C-121 
(terminal No. 34) engine-ECU connector.

• Check earthing line for open circuit and damage.

AK501995

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

AB

Connector: C-121

C-121 (GR)

C-121 (GR)

Harness side connector

<L. H. drive vehicles>

<R. H. drive vehicles>

AK305020

1

2

3

AB

Connector : B-117

Harness side 
connector

B-117(B)

Crank angle sensor

AK501994

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

AB

Connector: C-119

C-119 (GR)

C-119 (GR)

Harness side connector

<L. H. drive vehicles>

<R. H. drive vehicles>

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-162

Q: Is the check result normal? 

YES : 

Go to Step 8 .

NO : 

Repair the damaged harness wire.

STEP 14. Perform output wave pattern 
measurement at B-117 crank angle sensor 
connector (Using an oscilloscope).

• Use special tool test harness (MD998478) to con-

nect connector, and measure at pick-up harness.

• Engine: Idling

• Transmission: Neutral

• Voltage between terminal No. 2 and earth.

OK: Waveforms should be displayed on 
Inspection procedure using an oscilloscope 
(Refer to 

P.13A-385

), its maximum value 

should be 4.8 V or more, and its minimum 
value should be 0.6 V or less with no noise in 
waveform.

Q: Is the check result normal? 

YES : 

Go to Step 8 .

NO : 

Go to Step 15 .

STEP 15. Connector check: B-12X engine control 
relay connector

Q: Is the check result normal? 

YES : 

Go to Step 16 .

NO : 

Repair or replace the connector.

AK305020

1

2

3

AB

Connector : B-117

Harness side 
connector

B-117(B)

Crank angle sensor

AK305003

2

1

3

4

AB

Connector : B-12X

B-12X

Harness side 
connector

Relay box’s
triangle marks