Mitsubishi Colt Ralliart. Manual - part 169

TROUBLESHOOTING <CVT>

CVT

23A-19

(4) Use the special tool Check connector to measure 

the voltage between engine-CVT-ECU connector 
A-114 terminal No.18 and earth.

OK: 

• 3.8 − 4.0 V (CVT fluid temperature at 

20

°C)

• 3.2 − 3.4 V (CVT fluid temperature at 

40

°C)

• 1.7 − 1.9 V (CVT fluid temperature at 

80

°C)

Q: Is the check result normal?

YES : 

Go to Step 12.

NO : 

Go to Step 13.

STEP 12. 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 7.

NO : 

Repair the defective connector.

STEP 13. 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 14.

NO : 

Repair the defective connector.

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TROUBLESHOOTING <CVT>

CVT

23A-20

STEP 14. Check the harness between CVT 
control solenoid valve assembly connector A-117 
terminal No.1 and engine-CVT-ECU connector 
A-114 terminal No.18.

AC314190

AC

Inhibitor switch

Transmission 
control cable

A-117 (GR)

Connector: A-117

Harness side

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 or open cir-
cuit.

Q: Is the check result normal?

YES : 

Go to Step 7.

NO : 

Repair the wiring harness.

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TROUBLESHOOTING <CVT>

CVT

23A-21

Code No.18, 19 Line Pressure Sensor System

ENGINE-
CVT-ECU

LINE PRESSURE
SENSOR

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

Line Pressure Sensor System Circuit

AC405419AB

OPERATION

The line pressure sensor detects the fluid pressure 
applied to the secondary pulley, and sends the infor-
mation to the engine-CVT-ECU.

DIAGNOSIS CODE SET CONDITIONS

• If the line pressure sensor output voltage is 0.2 V 

or less while the engine is running (engine speed 
is 450 r/min or more, and the relay voltage is 10 V 
or more), code No.18 will be set.

• If the line pressure sensor output voltage is 4.7 V 

or more (fluid pressure is approximately 6.8 MPa 
or more) while the engine is idling (engine speed 
is 450 

− 1,000 r/min, and the relay voltage is 10 V 

or more, code No.19 will be set.

PROBABLE CAUSES

• Malfunction of line pressure sensor

• Damaged harness wires and connectors

• Malfunction of the engine-CVT-ECU

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III data list
Item 09: Line pressure 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 : 

Go to Step 2.

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TROUBLESHOOTING <CVT>

CVT

23A-22

STEP 2. Connector check: A-113 line pressure 
sensor connector.

AC314193

Connector: A-113

AB

A-113 (B)

Transmission 
control cable

1

2

3

Harness side

Check for the contact with terminals.

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Repair the defective connector.

STEP 3. Measure the resistance at line pressure 
sensor connector A-113.

AC314193

Connector: A-113

AB

A-113 (B)

Transmission 
control cable

1

2

3

Harness side

Disconnect the connector, and measure the resist-
ance between terminal 3 and earth at the wiring har-
ness side.

OK: 2 

Ω or less

Q: Is the check result normal?

YES : 

Go to Step 9.

NO : 

Go to Step 4.

STEP 4. Measure the voltage at engine-CVT-ECU 
connector A-114.
(1) Connect line pressure sensor connector A-113.

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.26 and earth.

OK: 0.5 V or less

Q: Is the check result normal?

YES : 

Go to Step 7.

NO : 

Go to Step 5.

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