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Home › Nissan-Datsun › 2012 › Sentra SE-R › Repair and Diagnosis › Transmission › Automatic Transmission (CVT) › Service Information › DTC P0715: Input Speed Sensor A › Diagnosis Procedure

Diagnosis Procedure

  1. CHECK INPUT SIGNAL

    With CONSULT 

    1. Start engine.
    2. Select "ECU INPUT SIGNALS" in "DATA MONITOR" mode for "TRANSMISSION" with CONSULT.
    3. Start vehicle and read out the value of "VSP SENSOR".
    Item name Condition Display value
    PRI SPEED SEN During driving (lock-up ON) Approximately matches the speedometer reading.

    OK or NG 

    OK: GO TO  8.

    NG: GO TO 2.

  2. CHECK PRIMARY SPEED SENSOR

    With CONSULT 

    1. Start engine.
    2. Check power supply to primary speed sensor by voltage between TCM connector terminals 25, 46 and 48. Refer to "CIRCUIT DIAGRAM ".
      Item Connector Terminal Data (Approx.)
      TCM F23 25 - 46 Battery voltage
      25 - 48
    3. If OK, check the pulse when vehicle cruises.
    Name Condition
    Primary speed sensor When running at 20 km/h (12 MPH) in "L" position, use the CONSULT pulse frequency measuring function.
    CAUTION: Connect the data link connector to the vehicle-side diagnosis connector.
    Item Connector Terminal Name Data (Approx.)
    TCM F23 33 Primary speed sensor 880 Hz

    OK or NG 

    OK: GO TO  8.

    NG: GO TO 3.

  3. CHECK POWER AND SENSOR GROUND
    1. Turn ignition switch OFF.
    2. Disconnect the primary speed sensor harness connector.
    3. Turn ignition switch ON.
    4. Check voltage between primary speed sensor harness connector terminals.
      Item Connector Terminal Data (Approx.)
      Primary speed sensor F38 3 - 1 Battery voltage
      Fig 1: Checking Sensor Power & Ground Circuits
      G04927036Courtesy of NISSAN NORTH AMERICA, INC.
    5. Check voltage between primary speed sensor harness connector terminal and ground.
      Item Connector Terminal Data (Approx.)
      Primary speed sensor F38 3 - ground Battery voltage
      6. Fig 2: Checking Sensor Power & Ground Circuits
      G04927037Courtesy of NISSAN NORTH AMERICA, INC.
    6. If OK, check harness for short to ground and short to power.
    7. Reinstall any part removed.

    OK or NG 

    OK: GO TO 4.

    NG - 1 >> Battery voltage is not supplied between terminals 1 and 3, terminals 1 and ground: GO TO  6.

    NG - 2 >> Battery voltage is not supplied between terminals 1 and 3 only: GO TO  7.

  4. CHECK HARNESS BETWEEN TCM AND PRIMARY SPEED SENSOR
    1. Turn ignition switch OFF.
    2. Disconnect TCM connector (A) and primary speed sensor harness connector (B).
    3. Check continuity between TCM connector (A) terminal and primary speed sensor harness connector (B) terminal.
      Item Connector Terminal Continuity
      TCM F23 33 Yes
      Primary speed sensor F38 2
      4. Fig 3: Checking Harness Between TCM & Primary Speed Sensor
      G04927038Courtesy of NISSAN NORTH AMERICA, INC.
    4. If OK, check harness for short to ground and short to power.
    5. Reinstall any part removed.

    OK or NG 

    OK: GO TO 5.

    NG: Repair open circuit or short to ground or short to power in harness or connectors.

  5. CHECK THE TCM SHORT

    Replace same type TCM, perform self-diagnosis check. Erase self-diagnostic results and them drive the vehicle [more than 40 km/h (25 MPH)], perform self-diagnosis check. Refer to "DTC CONFIRMATION PROCEDURE ".

    Is "P0715 PRI SPEED SEN" detected again? 

    YES: Replace the Primary speed sensor. Refer to "PRIMARY SPEED SENSOR ".

    NO: Replace TCM. Refer to "REMOVAL AND INSTALLATION ".

  6. CHECK HARNESS BETWEEN TCM AND PRIMARY SPEED SENSOR (POWER)
    1. Turn ignition switch OFF.
    2. Disconnect TCM connector, IPDM E/R connector, primary speed sensor and secondary speed sensor harness connector.
    3. Check continuity between TCM connector terminals, IPDM E/R harness connector terminal, primary speed sensor harness connector terminal and secondary speed sensor harness connector terminal. Refer to "CIRCUIT DIAGRAM ".
      Item Connector Terminal Continuity
      TCM F23 46, 48 Yes
      IPDM E/R E43 14
      Primary speed sensor F38 3
      Secondary speed sensor F30 3
      *: Vehicle side
    4. If OK, check harness for short to ground and short to power.
    5. Reinstall any part removed.

    OK or NG 

    OK: 10 A fuse (No. 49, located in the IPDM E/R) or ignition switch are malfunctioning.

    NG: Repair open circuit or short to ground or short to power in harness or connectors.

  7. CHECK HARNESS BETWEEN TCM AND PRIMARY SPEED SENSOR (SENSOR GROUND)
    1. Turn ignition switch OFF.
    2. Disconnect TCM connector (A) and primary speed sensor harness connector (B).
    3. Check continuity between TCM (A) connector terminal and primary speed sensor harness connector (B) terminal.
      Item Connector Terminal Continuity
      TCM F23 25 Yes
      primary speed sensor F38 1
      4. Fig 4: Checking Harness Between TCM & Primary Speed Sensor (Sensor Ground)
      G04927039Courtesy of NISSAN NORTH AMERICA, INC.
    4. If OK, check harness for short to ground and short to power.
    5. Reinstall any part removed.

    OK or NG 

    OK: GO TO 8.

    NG: Repair open circuit or short to ground or short to power in harness or connectors.

  8. CHECK DTC

    Perform "DTC CONFIRMATION PROCEDURE ".

    OK or NG 

    OK: INSPECTION END 

    NG: GO TO 9.

  9. CHECK TCM
    1. Check TCM input/output signals. Refer to "TCM INPUT/OUTPUT SIGNAL REFERENCE VALUE ".
    2. If NG, re-check TCM pin terminals for damage or loose connection with harness connector.

    OK or NG 

    OK: INSPECTION END 

    NG: Repair or replace damaged parts.

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