Mitsubishi Colt Ralliart. Manual - part 38

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4A9>

13A-106

STEP 4. Perform resistance measurement at 
A-105 No. 4 injector connector.

• Disconnect connector, and measure at harness 

side.

• Ignition switch: ON

• Voltage between terminal No. 1 and earth.

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 6 .

NO : 

Go to Step 5 .

STEP 5. Connector check: B-106 engine control 
relay connector

Q: Is the check result normal? 

YES : 

Check intermediate connector A-17 and 

B-112, and repair if necessary. If 
intermediate connectors are normal, check 
and repair harness between B-106 (terminal 
No. 4) engine control relay connector and 
A-105 (terminal No. 1) No. 4 injector 
connector.

• Check power supply line for 

open/short circuit and damage.

NO : 

Repair or replace the connector.

AK402150

M

1

2

A-105 (G)

Connector:  A-105

AC

A-105 Harness side

connector

3

2

1

4

AK402060

B-106
J/B side 
connector

B-106

Connector: B-106
J/B (front side)

AC

AK402150

M

1

2

A-105 (G)

Connector:  A-105

AC

A-105 Harness side

connector

Main

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Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4A9>

13A-107

STEP 6. Connector check: A-114 engine-ECU 
connector or engine-CVT-ECU connector

Q: Is the check result normal? 

YES : 

Go to Step 7 .

NO : 

Repair or replace the connector.

STEP 7. Check harness between B-106 (terminal 
No. 4) engine control relay connector and A-105 
(terminal No. 1) No. 4 injector connector.

NOTE: Before checking harness, check intermediate 
connectors A-17 and B-112, and repair if necessary. 

• Check power supply line for damage.

Q: Is the check result normal?

YES : 

Go to Step 8 .

NO : 

Repair the damaged harness wire.

AK402745

6

4

2

5

3

1

9

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52

53

54

55

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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

3

2

1

4

AK402060

B-106
J/B side 
connector

B-106

Connector: B-106
J/B (front side)

AC

AK402150

M

1

2

A-105 (G)

Connector:  A-105

AC

A-105 Harness side

connector

Main

Index

Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4A9>

13A-108

STEP 8. Check harness between A-105 (terminal 
No. 2) No. 4 injector connector and A-114 
(terminal No. 24) engine-ECU connector or 
engine-CVT-ECU connector.

• Check output line for open/short circuit and dam-

age.

Q: Is the check result normal? 

YES : 

Go to Step 9 .

NO : 

Repair the damaged harness wire.

STEP 9. Perform signal wave pattern 
measurement at A-114 engine-ECU connector or 
engine-CVT-ECU connector (Using an 
oscilloscope).

• Disconnect engine-ECU connector or 

engine-CVT-ECU connector, and connect special 
tool power plant ECU check harness 
(MB991987), and then measure the voltage on 
the check connector.

• Engine: Idling

• Transmission: P range

• Voltage between terminal No. 24 and earth.

OK: Waveform should be display on Inspec-
tion procedure using an oscilloscope (Refer 
to 

P.13A-348

).

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 <M/T> or 
engine-CVT-ECU <CVT>.

AK402150

M

1

2

A-105 (G)

Connector:  A-105

AC

A-105 Harness side

connector

AK402745

6

4

2

5

3

1

9

7

8

10

11

12

13

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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

AK402745

6

4

2

5

3

1

9

7

8

10

11

12

13

14

15

16

17

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51

52

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59

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61

62

63

64

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66

L

AE

A-114

Connector: 

A-114

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

Battery

A-114 Special tool power plant ECU check 
harness

Main

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Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4A9>

13A-109

Code No. P0222: Throttle Position Sensor (Sub) Circuit Low Input

OPERATION

• A power voltage of 5 V is applied to the elec-

tronic-controlled throttle valve (terminal No. 5) 
from the engine-ECU <M/T> or engine-CVT-ECU 
<CVT> (terminal No. 31).

• The power voltage is earthed to the engine-ECU 

<M/T> or engine-CVT-ECU <CVT> (terminal No. 
30) from the electronic-controlled throttle valve 
(terminal No. 3).

• The sensor signal is inputted to the engine-ECU 

<M/T> or engine-CVT-ECU <CVT> (terminal No. 
16) from the electronic-controlled throttle valve 
output terminal (terminal No. 4).

FUNCTION

• The throttle position sensor converts the throttle 

valve position into voltage and inputs it into the 
engine-ECU <M/T> or engine-CVT-ECU <CVT>.

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

<CVT> controls the throttle valve position.

TROUBLE JUDGMENT

Check Condition

• Ignition switch is in "ON" position.

Judgment Criteria

• Throttle position sensor (sub) output voltage is 

0.2 V or less <M/T>.

• Throttle position sensor (sub) output voltage is 

0.2 V or less for 0.5 second <CVT>.

PROBABLE CAUSES

• Failed throttle position sensor (sub)

• Open/short circuit in throttle position sensor (sub) 

circuit or loose connector contact

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

<CVT>

AK402686

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

5 V

31

5

Electronic-controlled
throttle valve

B-W

W-R

Y-R

16

30

4

3

Throttle Position Sensor (sub) Circuit

A-107

A-114

(sub)

Hall IC

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

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

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