LEMON Manuals: Even more car manuals for everyone
Home >> Nissan-Datsun >> 2019 >> Altima Edition ONE >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 7 (Automatic Transmission (Re0F10D) (DTC/Circuit Diagnosis)) >> DTC Diagnosis >> Transmission (TCM) >> DTC P0791: Intermediate Speed Sensor A >> DTC Diagnosis Procedure

DTC Diagnosis Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK PRIMARY SPEED SENSOR POWER CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect primary speed sensor connector.
    3. Turn ignition switch ON.
    4. Check voltage between primary speed sensor harness connector terminal and ground.

      +

      -

      Voltage

      Primary speed sensor

      Connector

      Terminal

      F8

      3

      Ground

      10 - 16 V

    Is the inspection result normal?

    YES

    GO TO 2.

    NO

    GO TO 6.

  2. CHECK PRIMARY SPEED SENSOR GROUND CIRCUIT 

    Check continuity between primary speed sensor harness connector terminal and ground.

    Primary speed sensor

    --

    Continuity

    Connector

    Terminal

    F8

    1

    Ground

    Existed

    Is the inspection result normal?

    YES

    GO TO 3.

    NO

    Repair or replace malfunctioning parts.

  3. CHECK CIRCUIT BETWEEN PRIMARY SPEED SENSOR AND TCM (PART 1) 
    1. Turn ignition switch OFF.
    2. Disconnect TCM connector.
    3. Check continuity between primary speed sensor harness connector terminal and TCM harness connector terminal.

      Primary speed sensor

      TCM

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      F8

      2

      F16

      35

      Existed

    Is the inspection result normal?

    YES

    GO TO 4.

    NO

    Repair or replace malfunctioning parts.

  4. CHECK CIRCUIT BETWEEN PRIMARY SPEED SENSOR AND TCM (PART 2) 

    Check continuity between primary speed sensor harness connector terminal and ground.

    Primary speed sensor

    --

    Continuity

    Connector

    Terminal

    F8

    2

    Ground

    Not existed

    Is the inspection result normal?

    YES

    GO TO 5.

    NO

    Repair or replace malfunctioning parts.

  5. CHECK TCM INPUT SIGNALS 
    1. Connect all of disconnected connectors.
    2. Lift the vehicle.
    3. Start the engine.
    4. Check frequency of primary speed sensor.

      +

      -

      Condition

      Frequency

      (Approx.)

      TCM

      Connector

      Terminal

      F16

      35

      Ground
      • Shift position: "L" position
      • Vehicle speed: 20 km/h (12 MPH)

      700 Hz

      GNSJSDIA3770GB-770Courtesy of NISSAN NORTH AMERICA, INC.

    Is the inspection result normal?

    YES

    INSPECTION END

    NO

    Replace primary speed sensor. Refer to Removal and Installation .

  6. CHECK CIRCUIT BETWEEN IPDM E/R AND PRIMARY SPEED SENSOR 
    1. Disconnect IPDM E/R connector.
    2. Check continuity between IPDM E/R harness connector terminal and primary speed sensor harness connector terminal.

      IPDM E/R

      Primary speed sensor

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      F10

      70

      F8

      3

      Existed

    Is the check result normal?

    YES

    GO TO 7.

    NO

    Repair or replace malfunctioning parts.

  7. DETECT MALFUNCTIONING ITEMS 

    Check the following items:

    • Harness open circuit or short circuit between ignition switch and IPDM E/R. Refer to Wiring Diagram .
    • 10A fuse (No. 46, located in the IPDM E/R). Refer to Wiring Diagram .
    • IPDM E/R

    Is the check result normal?

    YES

    INSPECTION END

    NO

    Repair or replace malfunctioning parts.

scientia non olet · About LEMON Manuals