Nissan Rogue Service Manual: P0743 torque converter

DTC Description

DTC DETECTION LOGIC

POSSIBLE CAUSE

•  Harness or connector (Torque converter clutch solenoid valve circuit is shorted to ground)
•  Torque converter clutch solenoid valve

FAIL-SAFE

•  Start is slow
•  Acceleration is slow
•  Lock-up is not performed

DTC CONFIRMATION PROCEDURE

CAUTION: Be careful of the driving speed.

1.PREPARATION BEFORE WORK

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

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.

FLUID TEMP : 20°C (68°F) or more

With GST

1.  Start the engine.
2.  Set the CVT fluid to 20°C (68°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 20°C (68°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 “P0743” detected? YES >> Go to TM-134, "Diagnosis Procedure".

NO-1 >> To check malfunction symptom before repair: Refer to GI-41, "Intermittent Incident".

NO-2 >> Confirmation after repair: INSPECTION END

Diagnosis Procedure

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 CIRCUIT BETWEEN CVT UNIT AND GROUND

Check resistance between CVT unit harness connector terminal and ground.

Is the inspection result normal? YES >> INSPECTION END

NO >> There is malfunction of torque converter clutch solenoid valve. Replace transaxle assembly. Refer to TM-220, "Removal and Installation".