Mitsubishi Colt Ralliart. Manual — part 696

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4G1>

13B-109

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

Q: Is the check result normal?

YES :

Check intermediate connectors 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) injector connector.

• Check power supply line for

open/short circuit.

NO :

Repair or replace.

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

Q: Is the check result normal?

YES :

Go to Step 7 .

NO :

Repair or replace.

3

2

1

4

AK402084

J/B side
connector

B-106

Connector: B-106
J/B (front side)

AC

AK402091

M

1

2

A-105(G)

AC

Connector: A-105

Harness side
connector

AK402745

6

4

2

5

3

1

9

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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-110

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

STEP 8. Connector check: A-114 engine-ECU
connector

Q: Is the check result normal?

YES :

Go to Step 9 .

NO :

Repair or replace.

3

2

1

4

AK402084

J/B side
connector

B-106

Connector: B-106
J/B (front side)

AC

AK402091

M

1

2

A-105(G)

AC

Connector: A-105

Harness side
connector

AK402745

6

4

2

5

3

1

9

7

8

10

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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-111

STEP 9. Check harness between A-105 (terminal
No. 2) injector connector and A-114 (terminal No.
24) engine-ECU connector.

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

age.

Q: Is the check result normal?

YES :

Go to Step 10 .

NO :

Repair.

STEP 10. Perform signal wave pattern
measurement at A-114 engine-ECU connector
(Using an oscilloscope).

• Disconnect engine-ECU connector, and connect

special tool power plant ECU check harness
(MB991987) and measure the voltage on the
check connector.

• Engine: Idling

• Transmission: Neutral

• Voltage between terminal No. 24 and earth.

OK: Waveform as shown in Inspection Pro-
cedure with Oscilloscope (Refer to

P.13B-352

) should be displayed.

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.

AK402091

M

1

2

A-105(G)

AC

Connector: A-105

Harness side
connector

AK402745

6

4

2

5

3

1

9

7

8

10

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66

L

AF

A-114

Connector:

A-114

Harness side connector

Engine-ECU

Battery

AK402745

6

4

2

5

3

1

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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-112

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. 2)
from the engine-ECU (terminal No. 31).

• The power voltage is earthed to the engine-ECU

(terminal No. 30) from the electronic-controlled
throttle valve (terminal No. 4).

• The sensor signal is inputted to the engine-ECU

(terminal No. 16) from the electronic-controlled
throttle valve output terminal (terminal No. 3).

FUNCTION

• The throttle position sensor converts the throttle

valve position into voltage and inputs it into the
engine-ECU.

• The engine-ECU controls the throttle valve posi-

tion.

TROUBLE JUDGMENT

Check Condition

• Ignition switch is in "ON" position.

Judgment Criterion

• Throttle position sensor (sub) output voltage is

less than 0.2 V.

PROBABLE CAUSES

• Failed throttle position sensor (sub)

• Open/short circuit and damage in throttle position

sensor (sub) circuit or loose connector contact

• Failed engine-ECU

AK402686

6

1 2 3 4 5

19

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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

AF

5 V

31

2

Electronic-controlled
throttle valve

B-W

W-R

Y-R

16

30

3

4

Throttle Position Sensor (sub) Circuit

A-107

A-114

(sub)

Hall IC

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

Engine-ECU

Main

Index

Group

TOC