Mitsubishi Colt Ralliart. Manual — part 752

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4G1>

13B-333

STEP 5. Check harness between B-61 (terminal
No.1) clutch switch connector and A-114
(terminal No. 44) engine-ECU connector.

• Check intermediate connector A-17, and repair

necessary.

• Check output line for open/short circuit.

Q: Is the check result normal?

YES :

Replace engine-ECU.

NO :

Repair.

STEP 6. Perform resistance measurement at B-61
clutch switch connector.

• Disconnect the connector, and measure at the

harness side.

• Resistance between terminal No. 6 and earth.

OK: Continuity (2

Ω or less)

Q: Is the check result normal?

YES :

Go to Step 7 .

NO :

Check and repair harness between B-22

(terminal No. 6) clutch switch and body
earth.

• Check earthing line for open circuit

and damage.

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

Q: Is the check result normal?

YES :

Go to Step 8 .

NO :

Repair.

AK600405

1

2

3

4

5

6

B-61 (L)

Connector: B-61

B-61 Harness side
connector

AG

AK402745

6

4

2

5

3

1

9

7

8

10

11

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62

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65

66

L

AF

A-114

Connector:

A-114

Harness side connector

Engine-ECU

Battery

AK600405

1

2

3

4

5

6

B-61 (L)

Connector: B-61

B-61 Harness side
connector

AG

AK402745

6

4

2

5

3

1

9

7

8

10

11

12

13

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53

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55

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61

62

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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-334

STEP 8. Check harness between B-61 (terminal
No. 1) clutch switch connector and A-114
(terminal No. 44) engine-ECU connector.

• Check output line for damage.

Q: Is the check result normal?

YES :

Replace engine-ECU.

NO :

Repair.

AK600405

1

2

3

4

5

6

B-61 (L)

Connector: B-61

B-61 Harness side
connector

AG

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-335

Data List Reference Table

M1131152002612

Item
No.

Inspection
item

Inspection condition

Normal
condition

Inspection
procedure
No.

Reference
page

11

Oxygen
sensor
(front)

Engine: After
warm-up (leaner by
deceleration, richer
by acceleration)

Excessive
deceleration from
4,000 r/min

200 mV or less Code No.

P0130

P.13B-65

Excessive
acceleration

→ 600 − 1,000
mV

Engine: After
warm-up (using
oxygen sensor, check
air-fuel ratio as well
as control status by
engine-ECU.)

Idle operation

400 mV or less
⇔ 600 − 1,000
mV (varies)

2,500 r/min

12

Air flow
sensor*

1

• Engine coolant

temperature: 80

−

95

°C

• Lamps, electric

cooling fan and all
accessories: OFF

• Transmission:

Neutral

Idle operation

0.3

− 2.3 g/s

−

−

2,500 r/min

2.1

− 8.1 g/s

Excessive
acceleration

According to
acceleration,
flux is
increased

13

Intake air
temperature
sensor

Ignition switch: ON or
engine running

Intake air
temperature:

−20°C

−20°C

Code No.
P0110

P.13B-38

Intake air
temperature: 0

°C

0

°C

Intake air
temperature: 20

°C

20

°C

Intake air
temperature: 40

°C

40

°C

Intake air
temperature: 80

°C

80

°C

Main

Index

Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4G1>

13B-336

14

Throttle
position
sensor (sub)

• Remove the intake

air hose at the
throttle body

• Disconnect the

connector of the
electronic

−

controlled throttle
valve

• Connect only

terminals No. 1,
No. 2, No. 3 and
No. 4 between
disconnected
connectors with
the use of the
special tool:
MB991658

• Ignition switch: ON

(engine stopped
condition)

Fully close the
throttle valve with
your finger

4,300

− 4,700

mV

Code No.
P0222,
P0223

P.13B-112

,

P.13B-116

Fully open the
throttle valve with
your finger

200

− 600 mV

16

Power
supply
voltage

Ignition switch: ON

System
voltage

Procedure
No. 21

P.13B-282

18

Cranking
signal
(ignition
switch-ST)

Ignition switch: ON

OFF

Procedure
No. 21

P.13B-282

Engine: Cranking

ON

21

Engine
coolant
temperature
sensor

Ignition switch: ON or
engine running

Coolant
temperature:

−20°C

−20°C

Code No.
P0115

P.13B-45

Coolant
temperature: 0

°C

0

°C

Coolant
temperature: 20

°C

20

°C

Coolant
temperature: 40

°C

40

°C

Coolant
temperature: 80

°C

80

°C

Item
No.

Inspection
item

Inspection condition

Normal
condition

Inspection
procedure
No.

Reference
page

Main

Index

Group

TOC