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

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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

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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

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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