Mitsubishi Colt Ralliart. Manual — part 19

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4A9>

13A-30

STEP 15. Connector check: A-114 engine-ECU
connector or engine-CVT-ECU connector

Q: Is the check result normal?

YES :

Check and repair harness between A-106

(terminal No. 4) manifold absolute pressure
sensor connector and A-114 (terminal No.
33) engine-ECU connector or
engine-CVT-ECU connector.

• Check earthing line for damage.

NO :

Repair or replace the connector.

STEP 16. Perform voltage measurement at A-106
manifold absolute pressure sensor connector.

• Use special tool test harness (MB991709) to con-

nect connector, and measure at pick-up harness.

• Ignition switch: ON

• Voltage between terminal No. 1 and earth.

OK:

Altitude 0m: 3.8

− 4.2 V

Altitude 600m: 3.5

− 3.9 V

Altitude 1,200m: 3.3

− 3.7 V

Altitude 1,800m: 3.0

− 3.4 V

Q: Is the check result normal?

YES :

Go to Step 19 .

NO :

Go to Step 17 .

AK402745

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AD

A-114

Connector:

A-114

Harness side connector

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

Battery

AK402005

4

3

2 1

AC

A-106

Connector: A-106

A-106 Harness side
connector

AK402005

4

3

2 1

AC

A-106

Connector: A-106

A-106 Harness side
connector

Main

Index

Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4A9>

13A-31

STEP 17. Connector check: A-114 engine-ECU
connector or engine-CVT-ECU connector

Q: Is the check result normal?

YES :

Go to Step 18 .

NO :

Repair or replace the connector.

STEP 18. Check harness between A-106 (terminal
No. 1) manifold absolute pressure sensor
connector and A-114 (terminal No. 17)
engine-ECU connector or engine-CVT-ECU
connector.

• Check output line for short circuit and damage.

Q: Is the check result normal?

YES :

Replace manifold absolute pressure sensor.

NO :

Repair the damaged harness wire.

AK402745

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AD

A-114

Connector:

A-114

Harness side connector

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

Battery

AK402005

4

3

2 1

AC

A-106

Connector: A-106

A-106 Harness side
connector

AK402745

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AD

A-114

Connector:

A-114

Harness side connector

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

Battery

Main

Index

Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4A9>

13A-32

STEP 19. Perform voltage measurement at A-114
engine-ECU connector or engine-CVT-ECU
connector.

• Disconnect engine-ECU connector or

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

• Ignition switch: ON

• Voltage between terminal No. 17 and earth.

OK:

Altitude 0m: 3.8

− 4.2 V

Altitude 600m: 3.5

− 3.9 V

Altitude 1,200m: 3.3

− 3.7 V

Altitude 1,800m: 3.0

− 3.4 V

Q: Is the check result normal?

YES :

Go to Step 21 .

NO :

Go to Step 20 .

STEP 20. Connector check: A-114 engine-ECU
connector or engine-CVT-ECU connector

Q: Is the check result normal?

YES :

Check and repair check harness between

A-106 (terminal No. 1) manifold absolute
pressure sensor connector and A-114
(terminal No. 17) engine-ECU connector or
engine-CVT-ECU connector.

• Check output line for open circuit and

damage.

NO :

Repair or replace the connector.

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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

AK402745

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AD

A-114

Connector:

A-114

Harness side connector

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

Battery

AK402005

4

3

2 1

AC

A-106

Connector: A-106

A-106 Harness side
connector

Main

Index

Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4A9>

13A-33

STEP 21. Connector check: A-114 engine-ECU
connector or engine-CVT-ECU connector

Q: Is the check result normal?

YES :

Go to Step 8 .

NO :

Repair or replace the connector.

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AD

A-114

Connector:

A-114

Harness side connector

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

Battery

Main

Index

Group

TOC