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

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3

2 1

AC

A-106

Connector: A-106

A-106 Harness side
connector

AK402005

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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

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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