Mitsubishi Colt Ralliart. Manual - part 712

 

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Mitsubishi Colt Ralliart. Manual - part 712

 

 

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4G1>

13B-173

STEP 7. Check harness between A-131 (terminal 
No. 4) alternator connector and A-114 (terminal 
No. 65) engine-ECU connector.

Check output line for damage.

Q: Is the check result normal?

YES : 

Go to Step 8.

NO : 

Repair.

STEP 8. M.U.T.-III diagnosis code

• Reconfirmation of diagnosis code.

Q: Is the diagnosis code output?

YES : 

Replace the alternator.

NO : 

Intermittent malfunction (Refer to GROUP 
00 

− How to Use 

Troubleshooting/Inspection Service Points 

− 

How to Cope with Intermittent Malfunctions 

P.00-13

).

STEP 9. M.U.T.-III diagnosis code

• Reconfirmation of diagnosis code.

Q: Is the diagnosis code output?

YES : 

Replace the engine-ECU.

NO : 

Intermittent malfunction (Refer to GROUP 
00 

− How to Use 

Troubleshooting/Inspection Service Points 

− 

How to Cope with Intermittent Malfunctions 

P.00-13

).

2

1

3

4

AK402098

A-131(G)

Connector: A-131

Harness side 
connector

AC

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

AF

A-114

Connector: 

A-114

Harness side connector

Engine-ECU

Battery

Main

Index

Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4G1>

13B-174

Code No. P0638: Throttle Valve Control Servo Circuit Range/Performance Problem

OPERATION

• This system controls the electric current from the 

engine-ECU (terminals No. 7 and No. 22) to the 
throttle valve control servo (terminals No. 5 and 
No. 6).

FUNCTION

• The engine-ECU controls the opening of the 

throttle valve by changing the direction and the 
amount of the current flowing to the servo coil.

TROUBLE JUDGEMENT

Check Conditions

• Ignition switch is in "ON" position.

• Battery voltage is more than 8.3 V.

• Throttle position sensor (main) output voltage is 

more than 0.2 V and is less than 4.8 V.

• When variation in throttle valve opening angle is 

small.

Judgement Criterion

• Difference is more than 0.5 V between actual out-

put voltage and target output voltage of throttle 
position sensor (main).

Check Conditions

• Ignition switch is in "ON" position.

• (Main and sub) throttle position sensor are nor-

mal.

Judgement Criterion

• Learning value of throttle position sensor (main) 

middle opening angle is more than 4.0 V.

PROBABLE CAUSES

• Failed throttle valve return spring

• Failed throttle valve operation

• Failed throttle valve control servo

• Short circuit in or damage to the throttle valve 

control servo circuit, or loose connector contact

• Failed engine-ECU

AK402696

6

1 2 3 4 5

19

21

20

18

17

16

15

14

1213

11

8 9

L

10

37
52 53 54 555657585960616263646566

38 39 404142434445464748495051

22 23 24 252627282930313233343536

7

5

3

1

6

4

2

AE

7

6

BR

G-W

Engine-ECU

Motor drive circuit

22

5

A-107

Throttle Valve Control Servo Circuit

A-114

Wire colour code
B: Black  LG: Light green  G: Green  L: Blue  W: White  Y: Yellow  SB: Sky blue  BR: Brown  O: Orange  GR: Gray
R: Red  P: Pink  V: Violet

  P: Purple

Electronic-controlled
throttle valve

Main

Index

Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4G1>

13B-175

DIAGNOSIS PROCEDURE

STEP 1. Check throttle body.

• Check whether the throttle valve return spring is 

normal.

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Replace the throttle body assembly.

STEP 2. Check electronic-controlled throttle 
valve itself.

• Check electronic-controlled throttle valve (Refer 

to 

P.13B-368

).

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Replace the throttle body assembly.

STEP 3. Connector check: A-107 
electronic-controlled throttle valve connector

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Repair or replace.

STEP 4. Connector check: A-114 engine-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Repair or replace.

AK402086

1

6 5 4 3 2

A-107(B)

AC

Connector: A-107

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

AF

A-114

Connector: 

A-114

Harness side connector

Engine-ECU

Battery

Main

Index

Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4G1>

13B-176

STEP 5. Check harness between A-107 (terminal 
No. 5) electronic-controlled throttle valve 
connector and A-114 (terminal No. 22) 
engine-ECU connector.

Check signal line for short circuit and damage.

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Repair.

STEP 6. Check harness between A-107 (terminal 
No. 6) electronic-controlled throttle valve 
connector and A-114 (terminal No. 7) engine-ECU 
connector.

Check signal line for short circuit and damage.

Q: Is the check result normal?

YES : 

Go to Step 7.

NO : 

Repair.

STEP 7. M.U.T.-III diagnosis code

• Reconfirmation of diagnosis code.

Q: Is the diagnosis code output?

YES : 

Replace the engine-ECU.

NO : 

Intermittent malfunction (Refer to GROUP 
00 

− How to Use 

Troubleshooting/Inspection Service Points 

− 

How to Cope with Intermittent Malfunctions 

P.00-13

).

AK402086

1

6 5 4 3 2

A-107(B)

AC

Connector: A-107

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

AF

A-114

Connector: 

A-114

Harness side connector

Engine-ECU

Battery

AK402086

1

6 5 4 3 2

A-107(B)

AC

Connector: A-107

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

AF

A-114

Connector: 

A-114

Harness side connector

Engine-ECU

Battery

Main

Index

Group

TOC

 

 

 

 

 

 

 

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