Nissan Juke Service and Repair Manual : P0744 torque converter

DTC Logic

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE


DTC CONFIRMATION PROCEDURE

CAUTION:
Be careful of the driving speed.

1.PREPARATION BEFORE OPERATION 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 2

1. Start the engine.With CONSULT-III


1. Start the engine.

2. Select Data Monitor in TRANSMISSION.

3. Select FLUID TEMP.

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

FLUID TEMP : 20C (68F) or more

1. Start the engine.With GST.


1. Start the engine.

2. Set the CVT fluid to 20C (68F) or more.

NOTE

:
When the ambient temperature is 20C (68F), the CVT fluid usually increases to 50 to 80C (122 to 176F) with driving in an urban area for approximately 10 minutes.

Is the CVT fluid 20C (68F) 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 40 seconds or more.

Selector lever : D position

Accelerator pedal position : 1.0/8 or more Vehicle speed : 40 km/h (25 MPH) or more

3. Stop the vehicle.

4. Check the first trip DTC.

Is P0744 detected? YES >> Go to TM-421, "Diagnosis Procedure".

NO >> INSPECTION END

Diagnosis Procedure

1.CHECK LINE PRESSURE

Perform the line pressure test. Refer to TM-382, "Work Procedure".

Is the inspection result normal? YES >> GO TO 2.

NO >> Repair or replace the malfunction items.

2.CHECK TORQUE CONVERTER CLUTCH SOLENOID VALVE

1. Turn ignition switch OFF.

2. Disconnect the CVT unit connector.

3. Check the torque converter clutch solenoid valve. Refer to TM-421, "Component Inspection (Torque Converter Clutch Solenoid Valve)".

Is the inspection result normal? YES >> Check intermittent incident. Refer to GI-42, "Intermittent Incident".

NO >> Repair or replace the malfunction items.

Component Inspection (Torque Converter Clutch Solenoid Valve)

1.CHECK TORQUE CONVERTER CLUTCH SOLENOID VALVE

Check the resistance between the CVT unit connector terminal and ground.

Is the inspection result normal?


Is the inspection result normal? YES >> INSPECTION END

NO >> There is a malfunction of the torque converter clutch solenoid valve. Replace the transaxle assembly. Refer to TM-508, "Removal and Installation".

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