Mitsubishi Colt Ralliart. Manual - part 52

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4A9>

13A-162

STEP 6. Perform voltage measurement at A-114 
engine-ECU connector or engine-CVT-ECU 
connector.

• Disconnect connector, and measure at harness 

side.

• Ignition switch: ON

• Voltage between terminal No. 38 and earth.

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 8 .

NO : 

Go to Step 7 .

STEP 7. Connector check: A-114 engine-ECU 
connector or engine-CVT-ECU connector

Q: Is the check result normal?

YES : 

Check and repair harness between A-108 

(terminal No. 1) purge control solenoid valve 
connector and A-114 (terminal No. 38) 
engine-ECU connector or engine-CVT-ECU 
connector.

• Check output line for open/short 

circuit.

NO : 

Repair or replace the connector.

AK402745

6

4

2

5

3

1

9

7

8

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

65

66

L

AD

A-114

Connector: 

A-114

Harness side connector

Engine-ECU <M/T> or
engine-CVT-ECU <CVT>

Battery

AK402745

6

4

2

5

3

1

9

7

8

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

65

66

L

AD

A-114

Connector: 

A-114

Harness side connector

Engine-ECU <M/T> or
engine-CVT-ECU <CVT>

Battery

AK402007

1

2

AC

Connector: A-108

A-108 (B)

A-108 Harness side
connector

Main

Index

Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4A9>

13A-163

STEP 8. Connector check: A-114 engine-ECU 
connector or engine-CVT-ECU connector

Q: Is the check result normal?

YES : 

Go to Step 9 .

NO : 

Repair or replace the connector.

STEP 9. Check harness between A-108 (terminal 
No. 1) purge control solenoid valve connector 
and A-114 (terminal No. 38) engine-ECU 
connector or engine-CVT-ECU connector.

• Check output line for damage.

Q: Is the check result normal?

YES : 

Go to Step 10 .

NO : 

Repair the damaged harness wire.

AK402745

6

4

2

5

3

1

9

7

8

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

65

66

L

AD

A-114

Connector: 

A-114

Harness side connector

Engine-ECU <M/T> or
engine-CVT-ECU <CVT>

Battery

AK402007

1

2

AC

Connector: A-108

A-108 (B)

A-108 Harness side
connector

AK402745

6

4

2

5

3

1

9

7

8

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

65

66

L

AD

A-114

Connector: 

A-114

Harness side connector

Engine-ECU <M/T> or
engine-CVT-ECU <CVT>

Battery

Main

Index

Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4A9>

13A-164

STEP 10. Check harness between A-114 (terminal 
No. 2) purge control solenoid valve connector 
and B-106 (terminal No. 4) engine control relay 
connector.

NOTE: Before checking harness, check intermediate 
connector A-17 and B-112, and repair if necessary.

• Check power line for damage.

Q: Is the check result normal?

YES : 

Go to Step 11 .

NO : 

Repair the damaged harness wire.

STEP 11. M.U.T.-III actuator test

• Item 08: purge control solenoid valve

OK: Operating sound can be heard and the 
valve vibrates

Q: Is the check result normal?

YES : 

Intermittent malfunction (Refer to Group 00 

− 

How to Use Troubleshooting/Inspection 
Service Points 

− How to Cope with 

Intermittent Malfunctions 

P.00-13

).

NO : 

Replace engine-ECU <M/T> or 
engine-CVT-ECU <CVT>.

AK402007

1

2

AC

Connector: A-108

A-108 (B)

A-108 Harness side
connector

3

2

1

4

AK402060

B-106
J/B side 
connector

B-106

Connector: B-106
J/B (front side)

AC

Main

Index

Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4A9>

13A-165

Code No. P0500: Vehicle Speed Signal System <M/T>

FUNCTION

• The vehicle speed signals are input to 

engine-ECU from ABS-ECU through CAN com-
munication.

TROUBLE JUDGMENT

Check Conditions

• 2 seconds later after the ignition switch has been 

in "ON" position or the engine has started up.

• Engine speed is 2,500 − 4,000 r/min.

• Under the high load operation

Judgment Criteria

• For 4 seconds, the vehicle speed information 

received using the CAN does not change.

or

• For 4 seconds, the vehicle speed information 

received using the CAN is abnormal.

PROBABLE CAUSES

• Failed ABS-ECU

• Failed CAN

• Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III diagnosis code

Q: Is diagnosis code related with CAN communication 

displayed?
YES : 

Inspection chart for diagnosis code (Refer 

to 

P.13A-20

).

NO : 

Go to Step 2 .

STEP 2. M.U.T.-III other system diagnosis code

• Confirm whether the diagnosis codes are output 

from ABS-ECU.

Q:  Is the diagnosis code output?

YES : 

Perform the troubleshooting of ABS (Refer 

to GROUP 35B 

− Troubleshooting − Check 

Chart for Diagnosis Code 

P.35B-7

).

NO : 

Replace the engine-ECU (Refer to GROUP 
00 

− How to Use 

Troubleshooting/Inspection Service Points 

− 

How to Cope with Intermittent Malfunctions 

P.00-13

).

Main

Index

Group

TOC