Mitsubishi Colt Ralliart. Manual - part 721

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4G1>

13B-209

Code No. P2101: Throttle Valve Control Servo Magneto Malfunction

OPERATION

• Controls the current that is applied from the 

engine-ECU (terminals No. 7, No. 22) to the elec-
tronic-controlled throttle valve (terminals No. 5, 
No. 6).

FUNCTION

• Engine-ECU check whether the throttle valve 

control servo magneto failed.

TROUBLE JUDGMENT

Check Conditions

• Ignition switch is in "ON" position.

• Battery voltage is more than 8.3 V.

Judgement Criterion

• Driving current of throttle valve control servo is 

abnormal.

Or

• Temperature in driving circuit of throttle valve 

control servo is abnormal.

PROBABLE CAUSE

• Failed throttle valve control servo.

• Open/short circuit in throttle valve control servo 

circuit or lose 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-210

DIAGNOSIS PROCEDURE

STEP 1. Connector check: A-107 
electronic-controlled throttle valve connector

Q: Is the check result normal?

YES : 

Go to Step 2 .

NO : 

Repair or replace.

STEP 2. Perform resistance measurement at 
A-107 electronic-controlled throttle valve 
connector.

• Disconnect connector, and measure at elec-

tronic-controlled throttle valve side.

• Resistance between terminal No. 5 and No. 6.

OK: 0.3 

− 100 kΩ (at 20°C)

Q: Is the check result normal?

YES : 

Go to Step 3 .

NO : 

Replace throttle body assembly.

STEP 3. Connector check: A-114 engine-ECU 
connector

Q: Is the check result normal? 

YES : 

Go to Step 4 .

NO : 

Repair or replace.

AK402086

1

6 5 4 3 2

A-107(B)

AC

Connector: A-107

Harness side 

connector

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

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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-211

STEP 4. Check harness between A-107 (terminal 
No. 6) electronic-controlled throttle valve 
connector and A-114 (terminal No. 7) engine-ECU 
connector.

• Check output line for short circuit and damage.

Q: Is the check result normal?

YES : 

Go to Step 5 .

NO : 

Repair.

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 output line for short circuit and damage.

Q: Is the check result normal?

YES : 

Go to Step 6 .

NO : 

Repair.

STEP 6. Check the trouble symptoms.

Q: Is the check result normal? 

YES : 

Replace 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

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4G1>

13B-212

Code No. P2108: Throttle Valve Control Servo Processor Malfunction

FUNCTION

• The engine-ECU checks the throttle valve control 

servo processor for abnormal conditions.

TROUBLE JUDGMENT

Check Conditions

• Ignition switch is in "ON" position.

• Throttle position sensor (main) output voltage is 

more than 0.2 V and is less than 4.8 V.

Judgement Criterion

• Throttle position sensor (main) input interface is 

abnormal.

PROBABLE CAUSE

• Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III diagnosis code.

Q: Is any other diagnosis code than P2108 output?

YES : 

Inspection chart for diagnosis code (Refer 

to 

P.13B-18

).

NO : 

Replace engine-ECU.

Code No. P2122: Accelerator Pedal Position Sensor (Main) Circuit Low Input

AK402685

R

92 93 94 95969798

77 78 79 808182838485868788899091

99

100

107 108 109 110 111112113114115116117118119120121
122 123 124 125126127128129130131132133134135136

101102103104105106

71 72

73 74

75 76

6

1 2 3 4 5

5 V

85

1

Accelerator
pedal
position
sensor

(main)

Hall IC

Y-G

GR

BR-W

83

84

3

2

Accelerator Pedal Position Sensor (main) Circuit

A-08

B-26

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

AD

Engine-ECU

Main

Index

Group

TOC