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Nissan Sentra B18 (2020-2025) Service Manual: Secondary Pressure Solenoid Valve Circuit

Diagnosis Procedure

Diagnosis Procedure

  1. CHECK HARNESS CONNECTOR

    1. Ignition switch OFF.

    2. Check the mating condition of TCM harness connector and CVT unit harness connector.

    Is the inspection result normal?

    YES >>

    GO TO 2.

    NO >>

    Repair or replace damaged parts.

  2. CHECK CONNECTOR TERMINAL

    1. Disconnect TCM harness connector and CVT unit harness connector.

    2. Check the connectors of TCM and CVT unit for water intrusion, or damage or corrosion of the terminals.

    Is the inspection result normal?

    YES >>

    GO TO 3.

    NO >>

    Repair or replace damaged parts.

  3. CHECK DETECTED DTC

    Are other solenoid valve malfunctions detected in addition to secondary pressure solenoid valve?

    YES >>

    GO TO 4.

    NO >>

    GO TO 7.

  4. CHECK SOLENOID GROUND CIRCUIT - 1

    1. Connect TCM harness connector.

    2. Check continuity (resistance) between CVT unit harness connector terminal and ground.

      CVT unit

      —

      Continuity (Resistance)

      Connector

      Terminal

      F46

      19

      Ground

      Existed (1 Ω or less)

    Is the inspection result normal?

    YES >>

    GO TO 6.

    NO >>

    GO TO 5.

  5. CHECK SENSOR GROUND CIRCUIT - 2

    1. Disconnect TCM harness connector.

    2. Check continuity (resistance) between TCM harness connector terminal and CVT unit harness connector terminal.

      TCM

      CVT unit

      Continuity (Resistance)

      Connector

      Terminal

      Connector

      Terminal

      F23

      43

      F46

      19

      Existed (1 Ω or less)

    Is the inspection result normal?

    YES >>

    GO TO 6.

    NO >>

    Repair harness or connector.

  6. CHECK TCM POWER SUPPLY AND GROUND CIRCUITS

    Check TCM power supply and ground circuits. Refer to Diagnosis Procedure.

    Is the inspection result normal?

    YES >>

    INSPECTION END

    NO >>

    Repair or replace damaged parts.

  7. CHECK SECONDARY PRESSURE SOLENOID VALVE CIRCUIT - 1

    Check continuity (resistance) between TCM harness connector terminal and CVT unit harness connector terminal.

    TCM

    CVT unit

    Continuity (Resistance)

    Connector

    Terminal

    Connector

    Terminal

    F23

    39

    F46

    3

    Existed (1 Ω or less)

    Is the inspection result normal?

    YES >>

    GO TO 8.

    NO >>

    Repair harness or connector.

  8. CHECK SECONDARY PRESSURE SOLENOID VALVE CIRCUIT - 2

    Check continuity between TCM harness connector terminal and ground.

    TCM

    −

    Continuity

    Connector

    Terminal

    F23

    39

    Ground

    Not existed

    Is the inspection result normal?

    YES >>

    GO TO 9.

    NO >>

    Repair harness.

  9. CHECK SECONDARY PRESSURE SOLENOID VALVE

    Check resistance between CVT unit connector terminals.

    CVT unit

    Test condition

    Resistance

    Terminal

    3

    19

    CVT fluid temperature

    20°C (68°F)

    5.0 – 5.6 Ω

    50°C (122°F)

    5.5 – 6.8 Ω

    80°C (176°F)

    6.0 – 8.0 Ω

    Is the inspection result normal?

    YES >>

    INSPECTION END

    NO >>

    Replace control valve due to secondary pressure solenoid valve malfunction. Refer to Removal and Installation.

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