Nissan Versa Sedan. Instruction — part 865

TM-366

< DTC/CIRCUIT DIAGNOSIS >

[CVT: RE0F11A]

P0740 TORQUE CONVERTER

P0740 TORQUE CONVERTER

DTC Logic

INFOID:0000000009268167

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

CAUTION:

Be careful of the driving speed.

1.

PREPARATION BEFORE OPERATION (PART 1)

If another "DTC CONFIRMATION PROCEDURE" occurs just before, turn ignition switch OFF and wait for at

least 10 seconds, then perform the next test.

>> GO TO 2.

2.

PREPARATION BEFORE OPERATION (PART 2)

With CONSULT

1. Start the engine.

2. Select “Data Monitor” in “TRANSMISSION”.

3. Select “FLUID TEMP”.

4. Confirm that the CVT fluid temperature is in the following range.

With GST

1. Start the engine.

2. Set the CVT fluid to 10

°C (50°F) or more.

NOTE:

When the ambient temperature is 20

°C (68°F), the CVT fluid usually increases to 50 to 80°C (122 to

176

°F) with driving in an urban area for approximately 10 minutes.

Is the CVT fluid 10

°C (50°F) or more?

YES

>> GO TO 3.

NO

>> 1. Warm the transaxle.

2. GO TO 3.

3.

CHECK DTC DETECTION

1. Drive the vehicle.

2. Maintain the following conditions for 10 seconds or more.

3. Stop the vehicle.

4. Check the first trip DTC.
Is “P0740” detected?

YES

>> Go to

TM-367, "Diagnosis Procedure"

.

NO

>> INSPECTION END

DTC

Trouble diagnosis name

DTC detection condition

Possible causes

P0740

Torque Converter Clutch Cir-
cuit/Open

The TCM torque converter clutch solenoid
valve current monitor reading is 200 mA or
less continuously for 5 seconds or more under
the following diagnosis conditions:
• Diagnosis conditions
- Solenoid valve output current: 750 mA or

more

- GND short diagnosis of the solenoid valve

circuit is not satisfied.

- TCM power supply voltage: More than 11 V

• Harness or connector

(Torque converter clutch solenoid
valve circuit is open or shorted to pow-
er supply)

• Torque converter clutch solenoid valve

FLUID TEMP

: 10

°C (50°F) or more

Selector lever

: “D” position

Vehicle speed

: 40 km/h (25 MPH) or more

P0740 TORQUE CONVERTER

TM-367

< DTC/CIRCUIT DIAGNOSIS >

[CVT: RE0F11A]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

Diagnosis Procedure

INFOID:0000000009268168

1.

CHECK CIRCUIT BETWEEN TCM AND CVT UNIT

1. Turn ignition switch OFF.

2. Disconnect TCM connector and CVT unit connector.

3. Check continuity between TCM harness connector terminal and CVT unit harness connector terminal.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace malfunctioning parts.

2.

CHECK TORQUE CONVERTER CLUTCH SOLENOID VALVE

Check torque converter clutch solenoid valve. Refer to

TM-367, "Component Inspection (Torque Converter

Clutch Solenoid Valve)"

.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to

GI-45, "Intermittent Incident"

.

NO

>> Repair or replace malfunctioning parts.

Component Inspection (Torque Converter Clutch Solenoid Valve)

INFOID:0000000009268169

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

>> There is a malfunction of torque converter clutch solenoid valve. Replace transaxle assembly.

Refer to

TM-452, "Removal and Installation"

.

TCM

CVT unit

Continuity

Connector

Terminal

Connector

Terminal

F44

38

F46

6

Existed

CVT unit

Ground

Condition

Resistance

Terminal

6

Ground

CVT fluid temperature: 20

°C (68°F)

Approx. 6.1

Ω

CVT fluid temperature: 50

°C (122°F)

Approx. 6.9

Ω

CVT fluid temperature: 80

°C (176°F)

Approx. 7.7

Ω

TM-368

< DTC/CIRCUIT DIAGNOSIS >

[CVT: RE0F11A]

P0743 TORQUE CONVERTER

P0743 TORQUE CONVERTER

DTC Logic

INFOID:0000000009268170

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

CAUTION:

Be careful of the driving speed.

1.

PREPARATION BEFORE OPERATION (PART 1)

If another "DTC CONFIRMATION PROCEDURE" occurs just before, turn ignition switch OFF and wait for at

least 10 seconds, then perform the next test.

>> GO TO 2.

2.

PREPARATION BEFORE OPERATION (PART 2)

With CONSULT

1. Start the engine.

2. Select “Data Monitor” in “TRANSMISSION”.

3. Select “FLUID TEMP”.

4. Confirm that the CVT fluid temperature is in the following range.

With GST

1. Start the engine.

2. Set the CVT fluid to 10

°C (58°F) or more.

NOTE:

When the ambient temperature is 20

°C (68°F), the CVT fluid usually increases to 50 to 80°C (122 to

176

°F) with driving in an urban area for approximately 10 minutes.

Is the CVT fluid 10

°C (58°F) or more?

YES

>> GO TO 3.

NO

>> 1. Warm the transaxle.

2. GO TO 3.

3.

CHECK DTC DETECTION

1. Drive the vehicle.

2. Maintain the following conditions for 5 seconds or more.

3. Stop the vehicle.

4. Check the first trip DTC.
Is “P0743” detected?

YES

>> Go to

TM-369, "Diagnosis Procedure"

.

NO

>> INSPECTION END

DTC

Trouble diagnosis name

DTC detection condition

Possible causes

P0743

Torque Converter Clutch Cir-
cuit Electrical

The TCM torque converter clutch solenoid
valve current monitor reading is 200 mA or
less continuously for 480 msec or more under
the following diagnosis conditions:
• Diagnosis conditions
- Solenoid valve output current: 750 mA or

more

- GND short circuit diagnosis occurs in the

solenoid valve drive circuit.

- TCM power supply voltage: More than 11 V

• Harness or connector

(Torque converter clutch solenoid
valve circuit is shorted to ground)

• Torque converter clutch solenoid valve

FLUID TEMP

: 10

°C (50°F) or more

Selector lever

: “D” position

Vehicle speed

: 40 km/h (25 MPH) or more

P0743 TORQUE CONVERTER

TM-369

< DTC/CIRCUIT DIAGNOSIS >

[CVT: RE0F11A]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

Diagnosis Procedure

INFOID:0000000009268171

1.

CHECK CIRCUIT BETWEEN TCM AND CVT UNIT

1. Turn ignition switch OFF.

2. Disconnect TCM connector and CVT unit connector.

3. Check continuity between TCM harness connector terminal and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace malfunctioning parts.

2.

CHECK TORQUE CONVERTER CLUTCH SOLENOID VALVE

Check torque converter clutch solenoid valve. Refer to

TM-369, "Component Inspection (Torque Converter

Clutch Solenoid Valve)"

.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to

GI-45, "Intermittent Incident"

.

NO

>> Repair or replace malfunctioning parts.

Component Inspection (Torque Converter Clutch Solenoid Valve)

INFOID:0000000009268172

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

>> There is a malfunction of torque converter clutch solenoid valve. Replace transaxle assembly.

Refer to

TM-452, "Removal and Installation"

.

TCM

Ground

Continuity

Connector

Terminal

F44

38

Ground

Not existed

CVT unit

Ground

Condition

Resistance

Terminal

6

Ground

CVT fluid temperature: 20

°C (68°F)

Approx. 6.1

Ω

CVT fluid temperature: 50

°C (122°F)

Approx. 6.9

Ω

CVT fluid temperature: 80

°C (176°F)

Approx. 7.7

Ω