Nissan Tiida C11. Manual - part 1256

DTC P0740 TORQUE CONVERTER CLUTCH SOLENOID VALVE

TM-75

< COMPONENT DIAGNOSIS >

[TYPE 1 (4AT: RE4F03B)]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

4.

CHECK VALVE RESISTANCE

1.

Turn ignition switch OFF.

2.

Disconnect terminal cord assembly connector in engine room.

3.

Check resistance between terminal cord assembly harness con-
nector terminal and ground.

OK or NG

OK

>> GO TO 5.

NG

>> Repair or replace damaged parts.

5.

CHECK DTC

Perform 

TM-73, "DTC Confirmation Procedure"

.

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 6.

6.

CHECK TCM

1.

Check TCM input/output signal. Refer to 

TM-119, "Reference Value"

.

2.

If NG, recheck TCM pin terminals for damage or loose connection with harness connector.

OK or NG

OK

>> INSPECTION END

NG

>> Repair or replace damaged parts.

Component Inspection

INFOID:0000000001694341

TORQUE CONVERTER CLUTCH SOLENOID VALVE

• For removal, refer to 

TM-191, "Control Valve Assembly and Accumulators"

.

Resistance Check

• Check resistance between terminal and ground.

Operation Check

• Check solenoid valve by listening for its operating sound while

applying battery voltage to the terminal and ground.

Solenoid valve

 Connector

Terminal

Resistance (Approx.) 

Torque converter clutch 
solenoid valve

F30

5 - Ground

5 - 20 

Ω

SCIA3456E

Solenoid valve

Terminal

Resistance (Ap-

prox.)

Torque converter 
clutch solenoid 
valve

5

Ground

5 - 20 

Ω

SCIA2063E

SCIA2066E

TM-76

< COMPONENT DIAGNOSIS >

[TYPE 1 (4AT: RE4F03B)]

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

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

Description

INFOID:0000000001694342

• This malfunction will not be detected while the OD OFF indicator lamp is indicating another self-diagnosis

malfunction.

• This malfunction is detected when the A/T does not shift into fourth gear position or the torque converter

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

CONSULT-III Reference Value in Data Monitor Mode

INFOID:0000000001694343

Remarks: Specification data are reference values.

On Board Diagnosis Logic

INFOID:0000000001694344

• This is an OBD self-diagnostic item.
• Diagnostic trouble code “P0744 A/T TCC S/V FNCTN” with CONSULT-III is detected when A/T cannot per-

form lock-up even if electrical circuit is good.

• This diagnosis monitors actual gear position by checking the torque converter slip ratio calculated by TCM

as follows:
Torque converter slip ratio = A x C/B
A: Output shaft revolution signal from revolution sensor
B: Engine speed signal from ECM
C: Gear ratio determined as gear position which TCM supposes
If the actual gear position is much lower than the position (4th) supposed by TCM, the slip ratio will be much
less than normal. In case the ratio does not reach the specified value, TCM judges this diagnosis malfunc-
tion.
This malfunction will be caused when shift solenoid valve B is stuck closed.

• Gear positions supposed by TCM are as follows.

In case of gear position with no malfunctions: 1, 2, 3 and 4 positions
In case of gear position with shift solenoid valve B stuck closed: 1, 2, 2 and 1* positions to each gear position
above
*: “P0744 A/T TCC S/V FNCTN” is detected.

Possible Cause

INFOID:0000000001694345

• Line pressure solenoid valve
• Torque converter clutch solenoid valve
• Each clutch
• Hydraulic control circuit

DTC Confirmation Procedure

INFOID:0000000001694346

CAUTION:

• Always drive vehicle at a safe speed.
• If performing this “DTC Confirmation Procedure” again, always turn ignition switch OFF and wait at

least 10 seconds before continuing.

After the repair, perform the following procedure to confirm the malfunction is eliminated.

 WITH CONSULT-III

1.

Start engine and select “DATA MONITOR” mode for “A/T” with CONSULT-III.

2.

Touch “START”.

3.

Make sure that output voltage of A/T fluid temperature sensor is within the range below.
FLUID TEMP SE: 0.4 - 1.5V
If out of range, drive vehicle to decrease voltage (warm up the fluid) or stop engine to increase voltage
(cool down the fluid).

4.

Select “TCC S/V FNCTN P0744” of “DTC WORK SUPPORT” mode for “A/T” with CONSULT-III and touch
“START”.

Item name

Condition

Display value (Approx)

TCC S/V DUTY

Lock-up OFF 

⇔

 Lock-up ON

4% 

⇔

 94%

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

TM-77

< COMPONENT DIAGNOSIS >

[TYPE 1 (4AT: RE4F03B)]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

5.

Accelerate vehicle to more than 80 km/h (50 MPH) and maintain the following conditions continuously
until “TESTING” has turned to “COMPLETE”. (It will take approximately 30 seconds after “TESTING”
shows.)
THROTTLE POSI: 1.0/8 - 2.0/8 (at all times during step 4)
SLCT LVR POSI: “D” position
TCC S/V DUTY: More than 94%
VEHICLE SPEED: Constant speed of more than 80 km/h (50 MPH)

-

Make sure that “GEAR” shows “4”.

-

For shift schedule, refer to 

TM-319, "Vehicle Speed at Which Gear Shifting Occurs"

.

-

If “TESTING” does not appear on CONSULT-III for a long time, select “SELF-DIAG RESULTS”. In
case a DTC other than “P0744 A/T TCC S/V FNCTN” is shown, refer to 

TM-35, "CONSULT-III Func-

tion (TRANSMISSION)"

.

6.

Make sure that “OK” is displayed. (If “NG” is displayed, refer to “DIAGNOSTIC PROCEDURE”.)
Refer to 

TM-77, "Diagnosis Procedure"

.

Refer to 

TM-319, "Vehicle Speed at When Lock-up Occurs/Releases"

.

 WITH GST

Follow the procedure “WITH CONSULT-III”.

Diagnosis Procedure

INFOID:0000000001694347

1.

CHECK SHIFT-UP (D

3

 TO D

4

)

During 

TM-183, "Cruise Test - Part 1"

.

Does A/T shift from D

3

 to D

4

 at the specified speed?

YES

>> GO TO 11.

NO

>> GO TO 2.

2.

CHECK LINE PRESSURE

Perform line pressure test. Refer to 

TM-178, "Inspection and Judgment"

.

OK or NG

OK

>> GO TO 3.

NG

>> GO TO 6.

3.

CHECK CONTROL VALVE

1.

Disassemble control valve assembly. Refer to 

TM-243, "Control Valve Assembly"

.

2.

Check to ensure that:

-

Valve, sleeve and plug slide along valve bore under their own weight.

-

Valve, sleeve and plug are free from burrs, dents and scratches.

-

Control valve springs are free from damage, deformation and fatigue.

-

Hydraulic line is free from obstacles.

OK or NG

OK

>> GO TO 4.

NG

>> Repair control valve.

4.

CHECK SHIFT-UP (D

3

 TO D

4

)

SCIA7190E

TM-78

< COMPONENT DIAGNOSIS >

[TYPE 1 (4AT: RE4F03B)]

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

During 

TM-183, "Cruise Test - Part 1"

.

Does A/T shift from D

3

 to D

4

 at the specified speed?

YES

>> GO TO 5.

NO

>> Check control valve again. Repair or replace control

valve assembly.

5.

CHECK DTC

Perform 

TM-76, "DTC Confirmation Procedure"

.

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 11.

Check for proper lock-up.

6.

CHECK VALVE RESISTANCE

1.

Remove control valve assembly. Refer to 

TM-191, "Control Valve Assembly and Accumulators"

.

-

Line pressure solenoid valve

2.

Check resistance between terminal cord assembly harness con-
nector terminal and ground.

OK or NG

OK

>> GO TO 7.

NG

>> Replace solenoid valve assembly.

7.

CHECK VALVE OPERATION

1.

Remove control valve assembly. Refer to 

TM-191, "Control Valve Assembly and Accumulators"

.

-

Line pressure solenoid valve

2.

Check solenoid valve by listening for its operating sound while
applying battery voltage to the terminal and ground.

OK or NG

OK

>> GO TO 8.

NG

>> Replace solenoid valve assembly.

8.

CHECK CONTROL VALVE

1.

Disassemble control valve assembly. Refer to 

TM-243, "Control Valve Assembly"

.

2.

Check line pressure circuit valves for sticking.

-

Pressure regulator valve

-

Pilot valve

-

Pressure modifier valve

OK or NG

OK

>> GO TO 9.

NG

>> Repair control valve.

9.

CHECK SHIFT-UP (D

3

 TO D

4

)

SCIA7190E

Solenoid valve

Terminal

Resistance

(Approx.)

Line pressure solenoid valve

4

Ground

2.5 - 5

Ω

SCIA3457E

SCIA3275E