Mitsubishi Colt Ralliart. Manual - part 55

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4A9>

13A-174

STEP 3. Connector check: A-107 
electronic-controlled throttle valve connector 
and A-114 engine-ECU connector or 
engine-CVT-ECU connector 

Q: Is the check result normal?

YES : 

Go to Step 4 .

NO : 

Repair or replace the connector.

STEP 4. Check harness between A-107 (terminal 
No. 1) electronic-controlled throttle valve 
connector and A-114 (terminal No. 7) engine-ECU 
connector or engine-CVT-ECU connector.

• Check output line for short circuit and damage.

Q: Is the check result normal?

YES : 

Go to Step 5 .

NO : 

Repair the damaged harness wire.

AK402006

1

6 5 4 3 2

AC

A-107 (B)

Connector: A-107

A-107 Harness side
connector

AK402745

6

4

2

5

3

1

9

7

8

10

11

12

13

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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

AK402006

1

6 5 4 3 2

AC

A-107 (B)

Connector: A-107

A-107 Harness side
connector

AK402745

6

4

2

5

3

1

9

7

8

10

11

12

13

14

15

16

17

18

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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-175

STEP 5. Check harness between A-107 (terminal 
No. 2) electronic-controlled throttle valve 
connector and A-114 (terminal No. 22) 
engine-ECU connector or engine-CVT-ECU 
connector.

• Check output line for short circuit and damage.

Q: Is the check result normal?

YES : 

Go to Step 6 .

NO : 

Repair the damaged harness wire.

STEP 6. Check the trouble symptoms.

Q: Does trouble symptom persist?

YES : 

Replace engine-ECU <M/T> or 

engine-CVT-ECU <CVT>.

NO : 

Intermittent malfunction (Refer to GROUP 
00 

− How to Use 

Troubleshooting/Inspection Service Points 

− 

How to Cope with Intermittent Malfunctions 

P.00-13

).

AK402006

1

6 5 4 3 2

AC

A-107 (B)

Connector: A-107

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

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25

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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-176

Code No. P0642: Throttle Position Sensor Power Supply

FUNCTION

• The engine-ECU <M/T> or engine-CVT-ECU 

<CVT> checks the throttle position sensor power 
voltage for abnormal conditions.

TROUBLE JUDGMENT

Check Conditions

• Ignition switch is in "ON" position <M/T>.

• Battery positive voltage is 6.3 V or higher.

Judgement Criteria

• Throttle position sensor power voltage is 4.1 V or 

less <M/T>.

• Throttle position sensor power voltage is 4.1 V or 

less for 0.3 seconds <CVT>.

PROBABLE CAUSE

• Failed engine-ECU <M/T> or engine-CVT-ECU 

<CVT>

DIAGNOSIS

STEP 1. Check the trouble symptoms.

Q: Does trouble symptom persist?

YES : 

Replace engine-ECU <M/T> or 

engine-CVT-ECU <CVT>.

NO : 

Intermittent malfunction (Refer to GROUP 
00 

− How to Use 

Troubleshooting/Inspection Service Points 

− 

How to Cope with Intermittent Malfunctions 

P.00-13

).

Main

Index

Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4A9>

13A-177

Code No. P0657: Throttle Valve Control Servo Relay Circuit Malfunction

OPERATION

• Battery voltage is applied to the throttle valve 

control servo relay terminal (terminal No. 3).

• Battery voltage is applied to the throttle valve 

control servo relay terminal (terminal No. 1) from 
the engine control relay (terminal No. 4).

• The engine-ECU <M/T> or engine-CVT-ECU 

<CVT> (terminal No. 123) applies current to the 
throttle valve control servo relay coil by turning 
ON the power transistor in the unit in order to turn 
the relay ON.

AK503598

3

1

2

4

3

1

2

4

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

AC

Power source

L-W

R-L

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  PU: Purple

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

Throttle Valve Control Servo Relay Circuit

Engine
control
relay

Throttle 
valve
control 
servo 
relay

B-106

B-121

B-108

3

1

4

2

3

1

32

B-112

B-110

5

78

123

4

2

1

1

R

Fusible link

16

20A

J/B

To 

engine-ECU <M/T> or

engine-CVT-ECU <CVT>

A-08

Main

Index

Group

TOC