Nissan Tiida C11. Manual - part 1257

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

TM-79

< COMPONENT DIAGNOSIS >

[TYPE 1 (4AT: RE4F03B)]

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During 

TM-183, "Cruise Test - Part 1"

.

Does A/T shift from D

3

 to D

4

 at the specified speed?

YES

>> GO TO 10.

NO

>> Check control valve again. Repair or replace control

valve assembly.

10.

CHECK DTC

Perform 

TM-76, "DTC Confirmation Procedure"

.

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 11. Check for proper lock-up.

11.

CHECK LOCK-UP

During 

TM-183, "Cruise Test - Part 1"

.

A/T perform lock-up at the specified speed?

YES

>> Perform “Cruise test — Part 1” again and return to the

start point of this test group.

NO

>> GO TO 12.

12.

CHECK VALVE RESISTANCE

1.

Remove control valve assembly. Refer to 

TM-191, "Control Valve Assembly and Accumulators"

.

-

Torque converter clutch solenoid valve

2.

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

OK or NG

OK

>> GO TO 13.

NG

>> Replace solenoid valve assembly.

13.

CHECK VALVE OPERATION

1.

Remove control valve assembly. Refer to 

TM-191, "Control Valve Assembly and Accumulators"

.

-

Torque converter clutch solenoid valve

SCIA7190E

SCIA7191E

Solenoid valve

Terminal

Resistance

(Approx.)

Torque converter clutch solenoid valve

5

Ground

5 - 20 

Ω

SCIA2063E

TM-80

< COMPONENT DIAGNOSIS >

[TYPE 1 (4AT: RE4F03B)]

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

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 14.

NG

>> Replace solenoid valve assembly.

14.

CHECK CONTROL VALVE

1.

Disassemble control valve assembly. Refer to 

TM-243, "Control Valve Assembly"

.

2.

Check control valves for sticking.

-

Torque converter clutch control valve

-

Torque converter clutch relief valve

OK or NG

OK

>> GO TO 15.

NG

>> Repair control valve.

15.

CHECK LOCK-UP

During 

TM-183, "Cruise Test - Part 1"

.

A/T perform lock-up at the specified speed?

YES

>> GO TO 16.

NO

>> Check control valve again. Repair or replace control

valve assembly.

16.

CHECK DTC

Perform 

TM-76, "DTC Confirmation Procedure"

.

OK or NG

OK

>> INSPECTION END

NG

>> Perform “Cruise test — Part 1” again and return to the start point of this test group.

SCIA2066E

SCIA7191E

DTC P0745 LINE PRESSURE SOLENOID VALVE

TM-81

< COMPONENT DIAGNOSIS >

[TYPE 1 (4AT: RE4F03B)]

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DTC P0745 LINE PRESSURE SOLENOID VALVE

Description

INFOID:0000000001694348

The line pressure solenoid valve regulates the oil pump discharge pressure to suit the driving condition in
response to signals sent from the TCM.
The line pressure duty cycle value is not constant when the closed throttle position switch is ON. To
confirm the line pressure duty cycle at low-pressure, the accelerator (throttle) should be open until the
closed throttle position switch is OFF.

CONSULT-III Reference Value in Data Monitor Mode

INFOID:0000000001694349

Remarks: Specification data are reference values.

On Board Diagnosis Logic

INFOID:0000000001694350

• This is an OBD self-diagnostic item.
• Diagnostic trouble code “P0745 LINE PRESSURE S/V” with CONSULT-III or 11th judgement flicker without

CONSULT-III is detected when TCM detects an improper voltage drop while it tries to operate the solenoid
valve.

Possible Cause

INFOID:0000000001694351

• Harness or connector

(The solenoid circuit is open or shorted.)

• Line pressure solenoid valve

DTC Confirmation Procedure

INFOID:0000000001694352

CAUTION:

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.

Turn ignition switch ON and select “DATA MONITOR” mode for “A/T” with CONSULT-III.

2.

Touch “START”.

3.

Depress accelerator pedal completely and wait at least 1 second.

4.

If the check result is NG, go to 

TM-81, "Diagnosis Procedure"

.

 WITH GST

Follow the procedure “WITH CONSULT-III”.

 WITHOUT CONSULT-III

1.

Start engine.

2.

With brake pedal depressed, shift the lever from “P”

→

“N”

→

“D”

→

“N”

→

“P” positions.

3.

Perform self-diagnosis. Refer to 

TM-38, "Diagnosis Procedure without CONSULT-III"

.

4.

If the check result is NG, go to 

TM-81, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000001694354

1.

CHECK INPUT SIGNAL

With CONSULT-III

1.

Turn ignition switch ON. (Do not start engine.)

2.

Select “MAIN SIGNALS” in “DATA MONITOR” mode for “A/T” with CONSULT-III.

3.

Read out the value of “LINE PRES DTY” while driving. Check the value changes according to driving
speed.

Item name

Condition

Display value (Approx.)

LINE PRES DTY

Small throttle opening (Low line pressure) 

⇔

 Large 

throttle opening (High line pressure)

0% 

⇔

 94%

TM-82

< COMPONENT DIAGNOSIS >

[TYPE 1 (4AT: RE4F03B)]

DTC P0745 LINE PRESSURE SOLENOID VALVE

Without CONSULT-III

1.

Turn ignition switch ON. (Do not start engine.)

2.

Check voltage between TCM connector terminals and ground.

OK or NG

OK

>> GO TO 5.

NG

>> GO TO 2.

2.

CHECK DROPPING RESISTOR

1.

Turn ignition switch OFF.

2.

Disconnect dropping resistor harness connector in engine room.

3.

Check resistance between terminals.

OK or NG

OK 

>> GO TO 3.

NG

>> Repair or replace damaged parts.

3.

CHECK VALVE RESISTANCE

1.

Turn ignition switch OFF.

2.

Disconnect terminal cord assembly connector in engine room.

Item name

Condition

Display value

LINE PRES DTY

Small throttle opening (Low line pressure) 

⇔

 Large throttle opening (High line pres-

sure)

0% 

⇔

 94%

Item

Connec-

tor

Terminal

Condition

Judge-

ment stan-

dard 

(Approx.)

Line pres-
sure sole-
noid valve

E31

1 - Ground

When releasing accelera-
tor pedal after warming 
up engine.

1.5 - 3.0V

When depressing accel-
erator pedal fully after 
warming up engine.

0V

Line pres-
sure sole-
noid valve 
(with drop-
ping resis-
tor)

E31

2 - Ground

When releasing accelera-
tor pedal after warming 
up engine.

4 - 14V

When depressing accel-
erator pedal fully after 
warming up engine.

0V

SCIA3267E

Item

Connector

Terminal

Resistance (Approx.) 

Dropping resistor

E49

1 - 2

12 

Ω

SCIA4950E