Mitsubishi Lancer Evolution IX. Manual - part 397

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-63

STEP 7. Connector check: C-119 engine-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 8 .

NO : 

Repair or replace the connector.

STEP 8. Check harness between B-03 (terminal 
No. 1) throttle position sensor connector and 
C-119 (terminal No. 42) engine-ECU connector.

• Check power supply line for short circuit.

Q: Is the check result normal?

YES : 

Go to Step 9 .

NO : 

Repair the damaged harness wire.

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>

AK305010

2 1

3

4

AB

Connector : B-03

Harness side 
connector

B-03(B)

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-64

STEP 9. M.U.T.-II/III data list

• Refer to Data List Reference Table 

P.13A-372

.

a. Item No. 14: Throttle position 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 10. Perform resistance measurement at 
B-03 throttle position sensor connector.

• Disconnect connector, and measure at harness 

side.

• Resistance between terminal No. 4 and earth.

OK: 2 

Ω or less

Q: Is the check result normal?

YES : 

Go to Step 13 .

NO : 

Go to Step 11 .

STEP 11. Connector check: C-119 engine-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 12 .

NO : 

Repair or replace the connector.

AK305010

2 1

3

4

AB

Connector : B-03

Harness side 
connector

B-03(B)

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-65

STEP 12. Check harness between B-03 (terminal 
No. 4) throttle position sensor connector and 
C-119 (terminal No. 49) engine-ECU connector.

• Check earthing line for open circuit and damage.

Q: Is the check result normal?

YES : 

Go to Step 9 .

NO : 

Repair the damaged harness wire.

STEP 13. Perform voltage measurement at B-03 
throttle position sensor connector.

• Use special tool test harness (MB991536) to con-

nect connector, and measure at pick-up harness.

• Ignition switch: "ON" 

• Voltage between terminal No. 1 and earth.

OK: 4.9 

− 5.1 V

Q: Is the check result normal?

YES : 

Go to Step 15 .

NO : 

Go to Step 14 .

AK305010

2 1

3

4

AB

Connector : B-03

Harness side 
connector

B-03(B)

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>

AK305010

2 1

3

4

AB

Connector : B-03

Harness side 
connector

B-03(B)

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-66

STEP 14. Connector check: C-119 engine-ECU 
connector

Q: Is the check result normal?

YES : 

Check and repair harness between B-03 

(terminal No. 1) throttle position sensor 
connector and C-119 (terminal No. 42) 
engine-ECU connector.

• Check power supply line for damage.

NO : 

Repair or replace the connector.

STEP 15. Perform voltage measurement at B-03 
throttle position sensor connector.

• Use special tool test harness (MB991536) to con-

nect connector, and measure at pick-up harness.

• Ignition switch: "ON"

• Voltage between terminal No. 4 and earth.

OK: 0.5 V or less

Q: Is the check result normal?

YES : 

Go to Step 17 .

NO : 

Go to Step 16 .

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>

AK305010

2 1

3

4

AB

Connector : B-03

Harness side 
connector

B-03(B)

AK305010

2 1

3

4

AB

Connector : B-03

Harness side 
connector

B-03(B)