Nissan Murano Z51. Manual - part 1428

P0740 TORQUE CONVERTER

TM-63

< DTC/CIRCUIT DIAGNOSIS >

[CVT: RE0F09B]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace damaged parts.

3.

CHECK HARNESS BETWEEN TCM AND CVT UNIT (TORQUE CONVERTER CLUTCH SOLENOID

VALVE) (PART 2)

Check continuity between TCM vehicle side harness connector terminal and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace damaged parts.

4.

CHECK TORQUE CONVERTER CLUTCH SOLENOID VALVE

Check torque converter clutch solenoid valve. Refer to 

TM-63, "Component Inspection (Torque Converter

Clutch Solenoid Valve)"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Replace transaxle assembly. Refer to 

TM-173, "Exploded View"

.

5.

DETECT MALFUNCTIONING ITEMS

Check TCM connector pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?

YES

>> Replace TCM. Refer to 

TM-160, "Exploded View"

.

NO

>> Repair or replace damaged parts.

Component Inspection (Torque Converter Clutch Solenoid Valve)

INFOID:0000000005513995

1.

CHECK TORQUE CONVERTER CLUTCH SOLENOID VALVE

Check resistance between CVT unit connector terminal and ground.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace transaxle assembly. Refer to 

TM-173, "Exploded View"

.

TCM vehicle side harness connector

CVT unit vehicle side harness connector

Continuity

Connector

Terminal

Connector

Terminal

F23

38

F24

12

Existed

TCM vehicle side harness connector

Ground

Continuity

Connector

Terminal

F23

38

Not existed

CVT unit connector

Ground

Resistance (Approx.)

Connector

Terminal

F24

12

3.0 – 9.0 

Ω

TM-64

< DTC/CIRCUIT DIAGNOSIS >

[CVT: RE0F09B]

P0744 TORQUE CONVERTER

P0744 TORQUE CONVERTER

Description

INFOID:0000000005513996

This malfunction is detected when the torque converter clutch does not lock-up as instructed by the TCM. This
is not only caused by electrical malfunctions (circuits open or shorted), but also by mechanical malfunctions
such as control valve sticking, improper solenoid valve operation, etc.

DTC Logic

INFOID:0000000005513997

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

CAUTION:

Always drive vehicle at a safe speed.
NOTE:
Immediately after performing any “DTC CONFIRMATION PROCEDURE”, always turn ignition switch OFF.
Then wait at least 10 seconds before performing the next test.

1.

CHECK DTC DETECTION

With CONSULT-III

1.

Turn ignition switch ON.

2.

Select “Data Monitor” in “TRANSMISSION”.

3.

Start engine and maintain the following condition for at least 30 seconds.

With GST

Follow the procedure “With CONSULT-III”.

Is “P0744” detected?

YES

>> Go to 

TM-64, "Diagnosis Procedure"

.

NO

>> Check intermittent incident. Refer to 

GI-39, "Intermittent Incident"

.

Diagnosis Procedure

INFOID:0000000005513998

1.

CHECK LINE PRESSURE

Perform line pressure test. Refer to 

TM-153, "Inspection and Judgment"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace damaged parts. Refer to 

TM-153, "Inspection and Judgment"

.

2.

CHECK TORQUE CONVERTER CLUTCH SOLENOID VALVE

1.

Turn ignition switch OFF.

2.

Disconnect CVT unit connector.

3.

Check torque converter clutch solenoid valve. Refer to 

TM-65, "Component Inspection (Torque Converter

Clutch Solenoid Valve)"

.

Is the inspection result normal?

YES

>> GO TO 3.

DTC

Trouble diagnosis name

DTC is detected if...

Possible cause

P0744

Torque Converter Clutch Cir-
cuit Intermittent

• CVT cannot perform lock-up even if elec-

trical circuit is good.

• TCM detects as irregular by comparing 

difference value with slip rotation.

• There is a big difference between engine 

speed and primary speed sensor when 
TCM lock-up signal is on.

• Torque converter clutch solenoid valve
• Hydraulic  control circuit

ACC PEDAL OPEN

: More than 1.0/8

RANGE

: “D” position 

VEHICLE SPEED

: Constant speed of more than 40 km/h (25 MPH)

P0744 TORQUE CONVERTER

TM-65

< DTC/CIRCUIT DIAGNOSIS >

[CVT: RE0F09B]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

NO

>> Replace transaxle assembly. Refer to 

TM-173, "Exploded View"

.

3.

CHECK LOCK-UP SELECT SOLENOID VALVE

Check lock-up select solenoid valve. Refer to 

TM-65, "Component Inspection (Lock-up Select Solenoid

Valve)"

.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Replace transaxle assembly. Refer to 

TM-173, "Exploded View"

.

4.

CHECK SECONDARY SPEED SENSOR SYSTEM

Check secondary speed sensor system. Refer to 

TM-55, "DTC Logic"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace damaged parts.

5.

CHECK PRIMARY SPEED SENSOR SYSTEM

Check primary speed sensor system. Refer to 

TM-52, "DTC Logic"

.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair or replace damaged parts.

6.

DETECT MALFUNCTIONING ITEMS

Check TCM connector pin terminals for damage or loose connection with harness connector.

Is the inspection result normal?

YES

>> Replace TCM. Refer to 

TM-160, "Exploded View"

.

NO

>> Repair or replace damaged parts.

Component Inspection (Torque Converter Clutch Solenoid Valve)

INFOID:0000000005513999

1.

CHECK TORQUE CONVERTER CLUTCH SOLENOID VALVE

Check resistance between CVT unit connector terminal and ground.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace transaxle assembly. Refer to 

TM-173, "Exploded View"

.

Component Inspection (Lock-up Select Solenoid Valve)

INFOID:0000000005514000

1.

CHECK LOCK-UP SELECT SOLENOID VALVE

Check resistance between CVT unit connector terminal and ground.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace transaxle assembly. Refer to 

TM-173, "Exploded View"

.

CVT unit connector

Ground

Resistance (Approx.)

Connector

Terminal

F24

12

3.0 – 9.0 

Ω

CVT unit connector

Ground

Resistance (Approx.)

Connector

Terminal

F24

13

6.0 – 19.0 

Ω

TM-66

< DTC/CIRCUIT DIAGNOSIS >

[CVT: RE0F09B]

P0745 PRESSURE CONTROL SOLENOID A

P0745 PRESSURE CONTROL SOLENOID A

Description

INFOID:0000000005514001

The line pressure solenoid valve regulates the oil pump discharge pressure to suit the driving condition in
response to a signal sent from the TCM.

DTC Logic

INFOID:0000000005514002

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

NOTE:
Immediately after performing any “DTC CONFIRMATION PROCEDURE”, always turn ignition switch OFF.
Then wait at least 10 seconds before performing the next test.

1.

CHECK DTC DETECTION

With CONSULT-III

1.

Turn ignition switch ON.

2.

Start engine and wait at least 5 seconds.

3.

Perform “Self Diagnostic Results” in “TRANSMISSION”.

With GST

Follow the procedure “With CONSULT-III”.

Is “P0745” detected?

YES

>> Go to 

TM-66, "Diagnosis Procedure"

.

NO

>> Check intermittent incident. Refer to 

GI-39, "Intermittent Incident"

.

Diagnosis Procedure

INFOID:0000000005514003

1.

CHECK LINE PRESSURE SOLENOID VALVE CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect TCM connector.

3.

Check resistance between TCM vehicle side harness connector terminal and ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> GO TO 2.

2.

CHECK HARNESS BETWEEN TCM AND CVT UNIT (LINE PRESSURE SOLENOID VALVE) (PART 1)

1.

Disconnect CVT unit connector.

2.

Check continuity between TCM vehicle side harness connector terminal and CVT unit vehicle side har-
ness connector terminal.

Is the inspection result normal?

DTC

Trouble diagnosis name

DTC is detected if...

Possible cause

P0745

Pressure Control Solenoid A

• Normal voltage is not applied to solenoid 

due to open or short circuit.

• TCM detects as irregular by comparing 

target value with monitor value.

• Harness or connectors

(Solenoid circuit is open or shorted.)

• Line pressure solenoid valve

TCM vehicle side harness connector

Ground

Resistance (Approx.)

Connector

Terminal

F23

40

3.0 – 9.0 

Ω

TCM vehicle side harness connector

CVT unit vehicle side harness connector

Continuity

Connector

Terminal

Connector

Terminal

F23

40

F24

2

Existed