Nissan Murano: Dtc/circuit Diagnosis / P0742 Torque Converter

Nissan Murano (Z52) 2015-2024 Service Manual / Transmission & Driveline / Transaxle & Transmission :: Cvt: Re0f10j / Dtc/circuit Diagnosis / P0742 Torque Converter

DTC Description

DTC DETECTION LOGIC

DTC

CONSULT screen terms

(Trouble diagnosis content) 		DTC detection condition
P0742

TORQUE CONVERTER

(Torque Converter Clutch Circuit Stuck On) 		Diagnosis condition

When all of the following conditions are satisfied:

  • TCM power supply voltage: More than 11 V

  • Range: D (Except for Manual mode)

  • Accelerator pedal position : 10 deg. or more

  • Engine speed: 450 rpm or more

  • LU pressure: Less than –0.1 MPa and this state is maintained for 5 seconds

  • Secondary pulley seed: more than 0 rpm and less than 2470 rpm
Signal —
Threshold Differences between engine speed and input speed: 40 rpm or less.
Diagnosis delay time Maintained for 5 seconds or more

POSSIBLE CAUSE

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

  • Torque converter clutch solenoid valve

  • Torque converter

  • Control valve

FAIL-SAFE

  • Start is slow

  • Engine stops when shift to “D” position during stopping the Nissan Murano vehicle.

Confirmation Procedure

DTC CONFIRMATION PROCEDURE

CAUTION:

Always drive vehicle at a safe speed.

PRECONDITIONING

If “DTC CONFIRMATION PROCEDURE” is previously conducted, always turn ignition switch OFF and wait at least 10 seconds before performing the next test.

>>

GO TO 2.

CHECK DTC DETECTION

  1. Start the engine.

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

    CAUTION:

    Always drive at a safe speed.

    Shift position : “D” position
    Accelerator pedal position : 1.0/8 or more
    Nissan Murano Vehicle speed : 1 - 15 km/h (0.6 - 9 MPH)
    Brake pedal : Depress*

    *: Keep depressing the brake pedal moderately not to accelrate the Nissan Murano vehicle.

  3. Check the first trip DTC.

Is “P0742” detected?

YES>>

Go to DTC Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

DTC Diagnosis Procedure

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.

    TCM CVT unit Continuity
    Connector Terminal Connector Terminal
    25 38 F44 5 Existed

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Repair or replace malfunctioning parts.

CHECK TORQUE CONVERTER CLUTCH SOLENOID VALVE CIRCUIT

Check resistance between CVT unit harness connector terminal and ground.

CVT unit — Condition Resistance
Connector Terminal
F209 5 Ground CVT fluid temperature: 20°C (68°F) 5.5 – 7.0 Ω
CVT fluid temperature: 50°C (122°F) 6.0 – 8.0 Ω
CVT fluid temperature: 80°C (176°F) 6.5 – 8.5 Ω

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

GO TO 3.

CHECK CIRCUIT BETWEEN CVT UNIT AND CONTROL VALVE

  1. Disconnect control valve connector. Refer to Removal and Installation .

  2. Check continuity between CVT unit harness connector terminal and control valve harness connector terminal.

CVT unit Control valve Continuity
Connector Terminal Connector Terminal
F209 5 F207 3 Existed

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Replace terminal cord assembly. Refer to Removal and Installation .

CHECK CIRCUIT BETWEEN CONTROL VALVE AND GROUND

Check resistance between control valve harness connector terminal and ground.

Control valve — Condition Resistance
Terminal
3 Ground CVT fluid temperature: 20°C (68°F) 5.5 – 7.0 Ω
CVT fluid temperature: 50°C (122°F) 6.0 – 8.0 Ω
CVT fluid temperature: 80°C (176°F) 6.5 – 8.5 Ω

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

There is malfunction of torque converter clutch solenoid valve. Replace control valve assembly. Refer to Removal and Installation .

    P0741 Torque Converter

    DTC Description DTC DETECTION LOGIC DTC CONSULT screen terms (Trouble diagnosis content) DTC detection condition P0741 TORQUE CONVERTER (Torque Converter Clutch Circuit Performance/Stuck Off) Diagnosis condition When all of the following conditions are satisfied: TCM power supply voltage: More than 11 V LU pressure: More than 0...

    P0746 Pressure Control Solenoid a

    DTC Description DTC DETECTION LOGIC DTC CONSULT screen terms (Trouble diagnosis content) DTC detection condition P0746 PC SOLENOID A (Pressure Control Solenoid A Performance/Stuck Off) 1 Diagnosis condition When all of the following conditions are satisfied: Engine speed: More than 600 rpm Primary pulley speed: More than 450 rpm Idle is not being detected...

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