Mitsubishi Colt Ralliart. Manual — part 698

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4G1>

13B-117

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III data list

• Refer to Data List Reference Table

P.13B-335

.

a. Item No. 14: Throttle position sensor (sub)

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 :

Go to Step 2 .

STEP 2. Connector check: A-107
electronic-controlled throttle valve connector

Q: Is the check result normal?

YES :

Go to Step 3 .

NO :

Repair or replace the connector.

STEP 3. Perform resistance measurement at
A-107 electronic-controlled throttle valve
connector.

• Disconnect connector, and measure at harness

side.

• Resistance between terminal No. 4 and earth.

OK: Continuity (2

Ω or less)

Q: Is the check result normal?

YES :

Go to Step 7 .

NO :

Go to Step 4 .

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

Q: Is the check result normal?

YES :

Go to Step 5 .

NO :

Repair or replace the connector.

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

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-118

STEP 5. Check harness between A-107 (terminal
No. 4) electronic-controlled throttle valve
connector and A-114 (terminal No. 30)
engine-ECU connector.

• Check earthing line for open circuit and damage.

Q: Is the check result normal?

YES :

Go to Step 6 .

NO :

Repair the damaged harness wire.

STEP 6. M.U.T.-III data list

• Refer the to Data List Reference Table

P.13B-335

.

a. Item No. 14: Throttle position sensor (sub)

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.

STEP 7. Replace the throttle body assembly

• After replacing the throttle body assembly,

re-check the trouble symptoms.

Q: Is the check result normal?

YES :

Check end.

NO :

Replace engine-ECU.

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-119

Code No. P0243: Waste Gate Solenoid Valve System

AK402716

3

1

2

4

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

2

1

A-137

Waste gate solenoid valve

1

2

36

Engine-ECU

GR-B

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

Waste Gate Solenoid Valve Circuit

J/B

Engine
control
relay

4

2

3

1

6

4

To engine-ECU

R

R

B-106

B-112

A-17

1

1

R

Fusible link

B-108

A-114

16

20A

Main

Index

Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4G1>

13B-120

OPERATION

• Power is supplied to the waste gate solenoid

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

• The engine-ECU (terminal No. 36) makes the

power transistor in the unit be in ON position, and
that makes currents go to the waste gate sole-
noid valve (terminal No. 2).

FUNCTION

• In response to a signal from the engine-ECU, the

waste gate solenoid valve controls the boost
pressure to be introduced into the waste gate
actuator of the turbocharger.

TROUBLE JUDGEMENT

Check Conditions

• While engine is running

• Battery voltage is more than 10 V and is less than

16 V.

Judgement Criterion

• Surge voltage cannot be detected when the

waste gate solenoid valve has changed from ON
to OFF.

PROBABLE CAUSES

• Failed waste gate solenoid valve

• Open/short circuit in waste gate solenoid valve

circuit or loose connector contact

• Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III actuator test

• Item 12: Waste gate 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 :

Go to Step 2 .

STEP 2. Connector check: A-137 waste gate
solenoid valve connector

Q: Is the check result normal?

YES :

Go to Step 3 .

NO :

Repair or replace.

STEP 3. Perform resistance measurement at
A-137 waste gate solenoid valve connector.

• Disconnect connector, and measure at solenoid

valve side.

• Resistance between terminals No. 1 and No. 2.

OK: 29

− 35 Ω (at 20°C)

Q: Is the check result normal?

YES :

Go to Step 4 .

NO :

Replace waste gate solenoid valve.

AK402121

1

2

AC

Connector: A-137

Harness side
connector

A-137(G)

AK402121

1

2

AC

Connector: A-137

Harness side
connector

A-137(G)

Main

Index

Group

TOC