Nissan Juke Service and Repair Manual : P0740 torque converter

DTC Logic

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE


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)

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 following range.

FLUID TEMP : 10°C (50°F) or more

1. Start the engine.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.

Selector lever : “D” position Vehicle speed : 40 km/h (25 MPH) or more

3. Stop the vehicle.

4. Check the first trip DTC.

Is “P0740” detected? YES >> Go to TM-417, "Diagnosis Procedure".

NO >> INSPECTION END

Diagnosis Procedure

1.CHECK CIRCUIT BETWEEN TCM AND CVT UNIT

1. Turn ignition switch OFF.

2. Disconnect the TCM connector and the CVT unit connector.

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

Is the check result normal?


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

NO >> Repair or replace the malfunctioning parts.

2.CHECK TORQUE CONVERTER CLUTCH SOLENOID VALVE

Check the torque converter clutch solenoid valve. Refer to TM-417, "Component Inspection (Torque Converter Clutch Solenoid Valve)".

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

NO >> Repair or replace the malfunctioning parts.

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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