Mitsubishi Outlander GS45X. Manual - part 1626

DIAGNOSIS

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CVT

23A-61

DTC SET CONDITIONS

Check Conditions

• Transmission range switch position: D.

• Throttle position sensor voltage: 1.37 volts or 

more.

• Primary pulley speed: 1,000 r/min or more.

• The absolute value of the Primary pulley speed - 

secondary pulley speed: 1,000 r/min or less.

• Voltage of battery: 9 volts or more.

• Voltage of battery: 16 volts or less.

JUDGMENT CRITERIA

• Engine revolution [primary pulley speed: 1,000 

r/min or more]: less than 450 r/min.

• The difference of engine speed and primary 

speed: more than 1,000 r/min. (5 seconds)

• The difference of engine speed and secondary 

speed: more than 1,000 r/min. (5 seconds)

.

OBD-II DRIVE CYCLE PATTERN

Transmission range: D (Drive the vehicle for 10 sec-
onds or more while the accelerator opening angle is 
20% or more)

.

PROBABLE CAUSES

• Malfunction of the CAN bus

• Malfunction of the engine system

• Malfunction of TCM

DIAGNOSTIC PROCEDURE

STEP 1. Using scan tool MB991958, diagnose the CAN bus 
line.
Use scan tool MB991958 to perform the CAN bus diagnosis.
Q: Is the check result normal?

YES : Go to Step 2.
NO :  Go to "CAN Troubleshooting."

STEP 2. Scan tool MB991958 diagnostic trouble code
Check if the engine-related diagnostic trouble code is set.
Q: Is the check result normal?

YES : Go to Step 3.
NO :  Go to "Engine Troubleshooting."

STEP 3. Symptom recheck after erasing diagnostic trouble 
code
Q: Is the check result normal?

YES : Intermittent malfunction
NO :  Replace TCM.

DIAGNOSIS

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CVT

23A-62

DTC P0740: Malfunction of Lockup Solenoid Valve

.

LINE
PRESSURE
SOLENOID
VALVE

SECONDARY
PRESSURE
SOLENOID
VALVE

LOCK-UP
SOLENOID
VALVE

LOCK-UP
SELECTION
SOLENOID
VALVE

CVT
ASSEMBLY

TRANSAXLE
CONTROL MODULE

Solenoid valve system circuit

AC709490

Connectors: A-12, A-13

AC

A-12

A-13

AC709493

AD

Connector: B-125

B-125 (B)

AC703253

Connector: C-38

Brake pedal

AB

DIAGNOSIS

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CVT

23A-63

DIAGNOSTIC FUNCTION

TCM determines malfunction by detecting the abnor-
mality in the lockup solenoid valve.

.

DESCRIPTIONS OF MONITOR METHODS

• Specified amount of current is not flown to the 

lockup solenoid valve because of an open or 
short circuit. 

.

MONITOR EXECUTION

• Continuous

.

MONITOR EXECUTION CONDITIONS 
(OTHER MONITOR AND SENSOR)

Other Monitor (There is no temporary DTC stored 

in memory for the item monitored below)

• P0741: Abnormality in lockup function

• P0746: Abnormality in hydraulic control system 

function

• P0841: Abnormality in line pressure sensor func-

tion

Sensor (The sensor below is determined to be 

normal)

• Not applicable

.

LOGIC FLOW CHARTS (Monitor Sequence)

.

AC710012

START

Yes

Yes

No

Continuous failure for 5 sec

No

No

Yes

Good

Malfunction

END

Yes

Yes

No

No

Target current    750 mA

Monitored current    400 mA

Monitored current    1.34 A

Continuous failure for 1 sec

DIAGNOSIS

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CVT

23A-64

DTC SET CONDITIONS

JUDGMENT CRITERIA

• Monitored current [target current: 750 mA or 

more]: 400 mA or less. (5 seconds)

• Monitored current: 1.34 A or more. (1 second)

.

OBD-II DRIVE CYCLE PATTERN

Ignition switch : ON (start the engine and keep it for 
10 seconds or more)

.

PROBABLE CAUSES

• Malfunction of valve body assembly (Faulty 

lockup solenoid valve)

• Damaged wiring harness and connectors

• Malfunction of TCM

DIAGNOSTIC PROCEDURE

STEP 1. M.U.T.-III data list

• Item 31: LU solenoid output current

• Item 30: LU solenoid monitor current

OK: Check if the output current and monitoring cur-
rent differ largely.

Q: Is the check result normal?

YES : Intermittent malfunction
NO :  Go to Step 2.

STEP 2. Check the following connector:

• C-38 TCM connector

• B-125 CVT assembly connector

Check the terminals for a contact status problem and internal 
short circuit.
Q: Is the check result normal?

YES : Go to Step 3.
NO :  Repair the defective connector.

STEP 3. Check for open circuit and short to ground in the 
wiring harness between the TCM connector and the CVT 
assembly connector.
Between C-38 TCM connector (terminal No.3) and B-125 CVT 
assembly connector (terminal No.3)
Q: Is the check result normal?

YES : Go to Step 4.
NO :  Repair the wiring harness.

STEP 4. Lockup solenoid valve single unit check
Refer to 

P.23A-146

.

Q: Is the check result normal?

YES : Go to Step 5.
NO :  Replace the valve body assembly.

STEP 5. Symptom recheck after erasing diagnostic trouble 
code
Q: Is the check result normal?

YES : Intermittent malfunction
NO :  Replace TCM.