Nissan Rogue Service Manual: P0743 torque converter

Nissan Rogue Service Manual / Transmission & driveline / Transaxle & Transmission / Dtc/circuit diagnosis / P0743 torque converter

DTC Description

DTC DETECTION LOGIC

DTC	CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
P0743	TORQUE CONVERTER (Torque Converter Clutch Circuit Electrical)	When all of the following conditions are satisfied and this state is maintained for 0.48 seconds: TCM power supply voltage: More than 11 V TCM judges that solenoid valve circuit is shorted to ground.

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

Start the engine.
Select “Data Monitor” in “TRANSMISSION”.
Select “FLUID TEMP”.
Confirm that the CVT fluid temperature is in the following range.

FLUID TEMP : 20°C (68°F) or more

With GST

Start the engine.
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

Drive the vehicle.
Maintain the following conditions for 10 seconds or more.

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

Stop the vehicle.
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

Turn ignition switch OFF.
Disconnect TCM connector and CVT unit connector.
. Check continuity between TCM harness connector terminal and ground.

Check circuit between TCM and CVT unit

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.

Check circuit between CVT unit 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".

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