Nissan Frontier D40. Manual - part 1071

 

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Nissan Frontier D40. Manual - part 1071

 

 

TM-182

< COMPONENT DIAGNOSIS >

[5AT: RE5R05A]

P0740 TORQUE CONVERTER

P0740 TORQUE CONVERTER

Description

INFOID:0000000005274063

• The torque converter clutch solenoid valve is activated, with the gear in D

4

, D

5

 by the TCM in response to

signals sent from the output speed sensor and accelerator pedal position sensor (throttle position sensor).
Torque converter clutch piston operation will then be controlled.

• Lock-up operation, however, is prohibited when A/T fluid temperature is too low.
• When the accelerator pedal is depressed (less than 1/8) 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.

CONSULT-III Reference Value in Data Monitor Mode

INFOID:0000000005274064

On Board Diagnosis Logic

INFOID:0000000005274065

• This is an OBD-II self-diagnostic item.
• Diagnostic trouble code “P0740” with CONSULT-III or 3rd judgment flicker without CONSULT-III is detected

under the following conditions.

- When TCM detects an improper voltage drop when it tries to operate the solenoid valve.
- When TCM detects as irregular by comparing target value with monitor value.

Possible Cause

INFOID:0000000005274066

• Torque converter clutch solenoid valve
• Harness or connectors

(The solenoid circuit is open or shorted.)

DTC Confirmation Procedure

INFOID:0000000005274067

CAUTION:

Always drive vehicle at a safe speed.
NOTE:
If “DTC Confirmation Procedure” has been previously performed, always turn ignition switch “OFF”
and wait at least 10 seconds before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.

 WITH CONSULT-III

1.

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

2.

Select “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.

3.

Start engine and maintain the following conditions for at least 5 consecutive seconds.
VHCL/S SE-A/T: 80 km/h (50 MPH) or more
ACCELE POSI: 0.5/8 - 1.0/8
SLCT LVR POSI: “D” position 
Driving location: Driving the vehicle uphill (increased engine load) will help maintain the driving
conditions required for this test.

4.

If DTC is detected go to 

TM-182, "Diagnosis Procedure"

.

 WITH GST

Follow the procedure “WITH CONSULT-III”.

Diagnosis Procedure

INFOID:0000000005274068

1.

CHECK INPUT SIGNAL

With CONSULT-III

1.

Turn ignition switch ON.

2.

Select “MAIN SIGNALS” in “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.

Item name 

Condition 

Display value (Approx.)

TCC SOLENOID

When performing slip lock-up

0.2 - 0.4 A

When performing lock-up

0.4 - 0.6 A

P0740 TORQUE CONVERTER

TM-183

< COMPONENT DIAGNOSIS >

[5AT: RE5R05A]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

3.

Start engine.

4.

Read out the value of “TCC SOLENOID” while driving.

OK or NG

OK

>> GO TO 4.

NG

>> GO TO 2.

2.

CHECK TCM POWER SUPPLY AND GROUND CIRCUIT

Check TCM power supply and ground circuit. Refer to 

TM-210, "Diagnosis Procedure"

.

OK or NG

OK

>> GO TO 3.

NG

>> Repair or replace damaged parts.

3.

DETECT MALFUNCTIONING ITEM

Check the following.
• The A/T assembly harness connector pin terminals for damage or loose connection with harness connector.

OK or NG

OK

>> Replace the control valve with TCM. Refer to 

TM-280, "Removal and Installation"

.

NG

>> Repair or replace damaged parts.

4.

CHECK DTC

Perform “DTC Confirmation Procedure”.
• Refer to 

TM-182, "DTC Confirmation Procedure"

.

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 2.

TM-184

< COMPONENT DIAGNOSIS >

[5AT: RE5R05A]

P0744 TORQUE CONVERTER

P0744 TORQUE CONVERTER

Description

INFOID:0000000005274069

This malfunction is detected when the A/T does not lock-up. 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.

CONSULT-III Reference Value in Data Monitor Mode

INFOID:0000000005274070

On Board Diagnosis Logic

INFOID:0000000005274071

• This is an OBD-II self-diagnostic item.
• Diagnostic trouble code “P0744” with CONSULT-III or 3rd judgment flicker without CONSULT-III is detected

under the following conditions.

- When A/T cannot perform lock-up even if electrical circuit is good.
- When TCM detects as irregular by comparing difference value with slip rotation.

Possible Cause

INFOID:0000000005274072

• Harness or connectors

(The solenoid circuit is open or shorted.)

• Torque converter clutch solenoid valve
• Hydraulic control circuit

DTC Confirmation Procedure

INFOID:0000000005274073

CAUTION:

Always drive vehicle at a safe speed.
NOTE:
If “DTC Confirmation Procedure” has been previously performed, always turn ignition switch “OFF”
and wait at least 10 seconds before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.

 WITH CONSULT-III

1.

Start engine.

2.

Select “DATA MONITOR" mode for "TRANSMISSION" with CONSULT-III.

3.

Drive vehicle and maintain the following conditions for at least 30 consecutive seconds. 
ACCELE POSI: More than 1.0/8 
SLCT LVR POSI: “D” position 
TCC SOLENOID: 0.4 - 0.6 A
VEHICLE SPEED: 80 km/h (50 MPH) or more
Driving locations: Driving the vehicle uphill (increased engine load) will help maintain the driving
conditions required for this test.

4.

If DTC is detected, go to 

TM-184, "Diagnosis Procedure"

.

 WITH GST

Follow the procedure “WITH CONSULT-III”.

Diagnosis Procedure

INFOID:0000000005274074

1.

CHECK INPUT SIGNAL

With CONSULT-III

1.

Turn ignition switch ON.

2.

Select “MAIN SIGNALS” in “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.

3.

Start the engine.

Item name

Condition 

Display value (Approx.)

TCC SOLENOID

When performing slip lock-up

0.2 - 0.4 A

When performing lock-up

0.4 - 0.6 A

P0744 TORQUE CONVERTER

TM-185

< COMPONENT DIAGNOSIS >

[5AT: RE5R05A]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

4.

Read out the value of “TCC SOLENOID” while driving.

OK or NG

OK

>> GO TO 4.

NG

>> GO TO 2.

2.

CHECK TCM POWER SUPPLY AND GROUND CIRCUIT

Check TCM power supply and ground circuit. Refer to 

TM-210, "Diagnosis Procedure"

.

OK or NG

OK

>> GO TO 3.

NG

>> Repair or replace damaged parts.

3.

DETECT MALFUNCTIONING ITEM

Check the following.
• The A/T assembly harness connector pin terminals for damage or loose connection with harness connector.

OK or NG

OK

>> Replace the control valve with TCM. Refer to 

TM-280, "Removal and Installation"

.

NG

>> Repair or replace damaged parts.

4.

CHECK DTC

Perform “DTC Confirmation Procedure”.
• Refer to 

TM-184, "DTC Confirmation Procedure"

.

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 2.

 

 

 

 

 

 

 

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