Nissan Altima L32. Manual - part 1495

TM-324

< COMPONENT DIAGNOSIS >

[CVT: RE0F10A]

P0740 TORQUE CONVERTER CLUTCH SOLENOID VALVE

P0740 TORQUE CONVERTER CLUTCH SOLENOID VALVE

Description

INFOID:0000000004201892

• The torque converter clutch solenoid valve is activated by the TCM in response to signals sent from the vehi-

cle speed and accelerator pedal position sensors. Lock-up piston operation will then be controlled.

• Lock-up operation, however, is prohibited when CVT fluid temperature is too low.

• When the accelerator pedal is depressed (less than 2.0/8) in lock-up condition, the engine speed should not

change abruptly. If there is a big jump in engine speed, there is no lock-up.

DTC Logic

INFOID:0000000004201893

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

NOTE:

If “DTC CONFIRMATION PROCEDURE” has been previously performed, 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. Wait at least 10 consecutive seconds.

3. Perform “SELF-DIAG RESULTS” mode for “TRANSMISSION”.

With GST

Follow the procedure “With CONSULT-III”.
Is “P0740 TCC SOLENOID/CIRC” detected?

YES

>> Go to 

TM-324, "Diagnosis Procedure"

.

NO

>> Check intermittent incident. Refer to 

GI-42, "Intermittent Incident"

.

Diagnosis Procedure

INFOID:0000000004201894

1.

CHECK TORQUE CONVERTER CLUTCH SOLENOID VALVE CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect TCM harness connector.

3. Check resistance between TCM harness connector F16 terminal

38 and ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> GO TO 2.

2.

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

VALVE) (PART 1)

DTC

Item

(CONSULT-III screen term)

Malfunction is detected when...

Possible cause

P0740

TCC SOLENOID/CIRC

Normal voltage not applied to solenoid due 
to open or short circuit.

• Torque converter clutch solenoid valve
• Harness or connectors

(Solenoid circuit is open or shorted.)

TCM harness connector

Ground

Resistance (Ap-

prox.)

Connector

Terminal

F16

38

3.0 – 9.0 

Ω

AWDIA0116ZZ

P0740 TORQUE CONVERTER CLUTCH SOLENOID VALVE

TM-325

< COMPONENT DIAGNOSIS >

[CVT: RE0F10A]

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1. Disconnect CVT unit harness connector.

2. Check continuity between TCM harness connector F16 (A) ter-

minal 38 and CVT unit harness connector F46 (B) terminal 12.

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 harness connector F16 terminal 38

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-325, "Component Inspection (Torque Converter

Clutch Solenoid Valve)"

.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> GO TO 5.

5.

CHECK DTC

With CONSULT-III

1. Turn ignition switch ON.

2. Perform “SELF-DIAG RESULTS” mode for “TRANSMISSION”.
Is only “P0740 TCC SOLENOID/CIRC” detected?

YES

>> Replace control valve. Refer to 

TM-447, "Exploded View"

.

NO

>> Replace transaxle assembly. Refer to 

TM-447, "Removal and Installation"

.

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-430, "Exploded View"

.

NO

>> Repair or replace damaged parts.

Component Inspection (Torque Converter Clutch Solenoid Valve)

INFOID:0000000004201895

1.

CHECK TORQUE CONVERTER CLUTCH SOLENOID VALVE

TCM harness connector

CVT unit harness connector

Continuity

Connector

Terminal

Connector

Terminal

F16 (A)

38

F46 (B)

12

Existed

AWDIA0117ZZ

TCM harness connector

Ground

Continuity

Connector

Terminal

F16

38

Not existed

AWDIA0116ZZ

TM-326

< COMPONENT DIAGNOSIS >

[CVT: RE0F10A]

P0740 TORQUE CONVERTER CLUTCH SOLENOID VALVE

Check resistance between CVT unit terminal 12 and ground.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace control valve. Refer to 

TM-447, "Exploded

View"

.

CVT unit terminal

Ground

Resistance (Approx.)

12

3.0 – 9.0 

Ω

AWDIA0118ZZ

P0744 A/T TCC S/V FUNCTION (LOCK -UP)

TM-327

< COMPONENT DIAGNOSIS >

[CVT: RE0F10A]

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P0744 A/T TCC S/V FUNCTION (LOCK -UP)

Description

INFOID:0000000004201896

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 malfunction (circuits open or shorted), but also by mechanical malfunction such

as control valve sticking, improper solenoid valve operation, etc.

DTC Logic

INFOID:0000000004201897

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

CAUTION:

Always drive vehicle at a safe speed.

NOTE:

If “DTC CONFIRMATION PROCEDURE” has been previously performed, 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”.

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

With GST

Follow the procedure “With CONSULT-III”.
Is “P0744 A/T TCC S/V FNCTN” detected?

YES

>> Go to 

TM-327, "Diagnosis Procedure"

.

NO

>> Check intermittent incident. Refer to 

GI-42, "Intermittent Incident"

.

Diagnosis Procedure

INFOID:0000000004201898

1.

CHECK LINE PRESSURE

Perform line pressure test. Refer to 

TM-423, "Inspection and Judgment"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace damaged parts.

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-328, "Component Inspection (Torque Con-

verter Clutch Solenoid Valve)"

.

Is the inspection result normal?

DTC

Item

(CONSULT-III screen term)

Malfunction is detected when...

Possible cause

P0744

A/T TCC S/V FNCTN

• 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 big difference engine speed and 

primary speed 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)