Mitsubishi Outlander GS45X. Manual — part 1627

DIAGNOSIS

TSB Revision

CVT

23A-65

DTC P0741: Abnormality in Lock-up Function

.

DIAGNOSTIC FUNCTION

Abnormality is detected by the TCM when the torque
converter slip speed is high during lockup control.

.

DESCRIPTIONS OF MONITOR METHODS

• The status with the high torque converter slip

speed continues for 30 seconds during lockup
control [Primary pulley speed and engine speed
are normal, and lockup differential pressure is 0.2
MPa (29 psi) or more].

.

MONITOR EXECUTION

• Transmission range: D

• Throttle valve opening : 1/8 or more

• Engine speed : 450 r/min or more

• CVT fluid temperature : from 20 to 180°C

(68~356

°F)

.

MONITOR EXECUTION CONDITIONS
(OTHER MONITOR AND SENSOR)

Other Monitor (There is no temporary DTC stored

in memory for the item monitored below)

• P0746: Abnormality in hydraulic control system

function

• P0841: Abnormality in line pressure sensor func-

tion

• P0868: Secondary pressure drop

Sensor (The sensor below is determined to be

normal)

• Not applicable

.

DIAGNOSIS

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CVT

23A-66

LOGIC FLOW CHARTS (Monitor Sequence)

.

DTC SET CONDITIONS

Check Conditions

• Transmission range switch position: D.

• Throttle position sensor voltage: 1.37 volts or

more.

• Engine speed: 450 r/min or more.

• Transmission fluid temperature: 20°C (68°F) or

more.

• Transmission fluid temperature: 180°C (356°F) or

less.

• Voltage of battery: 9 volts or more.

• Voltage of battery: 16 volts or less.

JUDGMENT CRITERIA

• Lock-up pressure: 0.2 MPa (29 psi) or more. (30

seconds)

• Torque converter slip revolution: 40+(vehicle

speed/2) or more. (30 seconds)

.

OBD-II DRIVE CYCLE PATTERN

Transmission range: D (Drive the vehicle for 30 sec-
onds or more while the accelerator opening angle is
20% or more)

.

PROBABLE CAUSES

• Abnormal line pressure

• Malfunction of TCM

AC710013

START

Lockup pressure 0.2 MPa (29 psi)

Yes

No

Yes

No

Good

Malfunction

END

Yes

No

Yes

No

Torque convertor slip revolution

Continuous failure for 30 secs.

40 + (Vehicle speed/2)

All secondary parameters
are in the enable condition.

DIAGNOSIS

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CVT

23A-67

DIAGNOSTIC PROCEDURE

STEP 1. Check other diagnostic trouble codes.
Q: Are other diagnostic trouble codes set?

YES : Carry out the appropriate troubleshooting.
NO : Go to Step 2.

STEP 2. M.U.T.-III data list

• Item 7: Primary speed

• Item 9: Engine revolution

OK: No considerable difference is observed between
the primary pulley speed and the engine speed.

Q: Is the check result normal?

YES : Intermittent malfunction
NO : Go to Step 3.

STEP 3. Line Pressure Check
Carry out "hydraulic test"(Refer to

P.23A-27

).

Q: Is the check result normal?

YES : Go to Step 4.
NO : Repair according to the hydraulic pressure test

diagnosis table.

STEP 4. Symptom recheck after erasing diagnostic trouble
code
Q: Is the check result normal?

YES : Intermittent malfunction
NO : Replace TCM.

DTC P0745: Malfunction of Line Pressure Solenoid Valve

.

SOLENOID VALVE SYSTEM CIRCUIT

Refer to

P.23A-62

.

.

DIAGNOSTIC FUNCTION

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

.

DESCRIPTIONS OF MONITOR METHODS

• Specified amount of current is not flown to the

line pressure 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

• P0868: Secondary pressure drop

Sensor (The sensor below is determined to be

normal)

• Not applicable

.

DIAGNOSIS

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CVT

23A-68

LOGIC FLOW CHARTS (Monitor Sequence)

.

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 line

pressure solenoid valve)

• Damaged wiring harness and connectors

• Malfunction of TCM

AC609280

START

Yes

Yes

No

Continuous failure for 5 sec

No

No

Yes

Good

Malfunction

END

Yes

Yes

No

No

PU solenoid circuit is ground short

Target current 750 mA

Monitored current 400 mA

Continuous failure for 1 sec

Monitored current 1.34 A

AC