Mitsubishi Colt Ralliart. Manual - part 172

TROUBLESHOOTING <CVT>

CVT

23A-31

STEP 5. Connector check: A-114 
engine-CVT-ECU connector.

AC403088AG

A-114

Connector: A-114

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A-114 Harness side connector

Engine-CVT-ECU

Battery

(GR)

Check for the contact with terminals.

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Repair the defective connector.

STEP 6. M.U.T.-III data list
Item 02: Turbine speed sensor (Refer to Data List 
Table 

P.23A-123

).

Q: Is the check result normal?

YES : 

Intermittent malfunction (Refer to GROUP 

00 

− How to Cope with Intermittent 

Malfunction 

P.00-13

).

NO : 

Replace the engine-CVT-ECU.

STEP 7. Connector check: A-114 
engine-CVT-ECU connector.

AC403088AG

A-114

Connector: A-114

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A-114 Harness side connector

Engine-CVT-ECU

Battery

(GR)

Check for the contact with terminals.

Q: Is the check result normal?

YES : 

Go to Step 8.

NO : 

Repair the defective connector.

Main

Index

Group

TOC

TROUBLESHOOTING <CVT>

CVT

23A-32

STEP 8. Check the harness between turbine 
speed sensor connector A-120 terminal No.1 and 
engine-CVT-ECU connector A-114 terminal No.60.

AC314200

Connector: A-120

AB

A-120 (GR)

Transmission 
control cable

Harness side

1

2

3

AC403088AG

A-114

Connector: A-114

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A-114 Harness side connector

Engine-CVT-ECU

Battery

(GR)

Check the earth line for open circuit.

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Repair the wiring harness.

STEP 9. Measure the voltage at turbine speed 
sensor connector A-120.

AC314200

Connector: A-120

AB

A-120 (GR)

Transmission 
control cable

Harness side

1

2

3

(1) Disconnect the connector, and measure the 

voltage between terminal 3 and earth at the 
wiring harness side.

(2) Turn the ignition switch to the ON position.

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 12.

NO : 

Go to Step 10.

STEP 10. Connectors check: A-17 intermediate 
connector, B-112 J/B connector.

AC313811 AG

Connector: A-17

A-17 (B)

AC313824 AO

Connector: B-112

Harness side

Junction block (Front view)

Check for the contact with terminals.

Q: Is the check result normal?

YES : 

Go to Step 11.

NO : 

Repair the defective connector.

Main

Index

Group

TOC

TROUBLESHOOTING <CVT>

CVT

23A-33

STEP 11. Check the harness between turbine 
speed sensor connector A-120 terminal No.3 and 
J/B connector B-112 terminal No.6.

AC314200

Connector: A-120

AB

A-120 (GR)

Transmission 
control cable

Harness side

1

2

3

AC313824 AO

Connector: B-112

Harness side

Junction block (Front view)

Check the power supply line for short-circuited or 
open circuit.

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Repair the wiring harness.

STEP 12. Measure the voltage at turbine speed 
sensor connector A-120.

AC314200

Connector: A-120

AB

A-120 (GR)

Transmission 
control cable

Harness side

1

2

3

(1) Disconnect the connector, and measure the 

voltage between terminal 2 and earth at the 
wiring harness side.

(2) Turn the ignition switch to the ON position.

OK: 4.9 

− 5.1 V

Q: Is the check result normal?

YES : . 

Go to Step 18.

NO : . 

Go to Step 13.

STEP 13. Measure the voltage at 
engine-CVT-ECU connector A-114.
(1) Connect turbine speed sensor connector A-120.

AC403088AF

A-114

Connector: A-114

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A-114 Check connector (special tool)

Engine-CVT-ECU

Battery

(GR)

(2) Disconnect the engine-CVT-ECU connector, and 

connect the special tool Power plant ECU check 
harness (MB991987).

(3) Turn the ignition switch to the ON position.
(4) Use the special tool Check connector to measure 

the voltage between engine-CVT-ECU connector 
A-114 terminal No.44 and earth.

OK: 4.9 

− 5.1 V

Q: Is the check result normal?

YES : 

Go to Step 16.

NO : 

Go to Step 14.

Main

Index

Group

TOC

TROUBLESHOOTING <CVT>

CVT

23A-34

STEP 14. Connector check: A-114 
engine-CVT-ECU connector.

AC403088AG

A-114

Connector: A-114

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A-114 Harness side connector

Engine-CVT-ECU

Battery

(GR)

Check for the contact with terminals.

Q: Is the check result normal?

YES : 

Go to Step 15.

NO : 

Repair the defective connector.

STEP 15. Check the harness between turbine 
speed sensor connector A-120 terminal No.2 and 
engine-CVT-ECU connector A-114 terminal No.44.

AC314200

Connector: A-120

AB

A-120 (GR)

Transmission 
control cable

Harness side

1

2

3

AC403088AG

A-114

Connector: A-114

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A-114 Harness side connector

Engine-CVT-ECU

Battery

(GR)

Check the output line for short-circuited.

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Repair the wiring harness.

Main

Index

Group

TOC