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Home >> Nissan-Datsun >> 2019 >> Altima Edition ONE >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 9 (Engine Control System (DTC/Circuit Diagnosis) (Pr25DD) (2 Of 4)) >> DTC/Circuit Diagnosis >> DTC P0520: EOP Sensor >> DTC Diagnosis Procedure >> PR25DD engine

PR25DD engine

WARNING: This page is about a different variant/trim than selected.
  1. CHECK ENGINE OIL 
    1. Turn ignition switch OFF.
    2. Check engine oil level and pressure. Refer to ENGINE OIL : Inspection .

    Is inspection result normal?

    YES

    GO TO 2.

    NO

    Repair or replace error-detected parts.

  2. CHECK EOP SENSOR POWER SUPPLY-1 
    1. Disconnect EOP sensor connector.
    2. Turn ignition switch ON.
    3. Check the voltage between EOP sensor harness connector terminals.

      EOP sensor

      Voltage

      (Approx.)

      Connector

      +

      -

      terminal

      F87

      3

      1

      5 V

    Inspection result normal?

    YES

    GO TO 7.

    NO

    GO TO 3.

  3. CHECK EOP SENSOR POWER SUPPLY-2 

    Check the voltage between EOP sensor harness connector and the ground.

    +

    -

    Voltage

    (Approx.)

    EOP sensor

    Connector

    Terminal

    F87

    3

    Ground

    5 V

    Is inspection result normal?

    YES

    GO TO 5.

    NO

    GO TO 4.

  4. CHECK SENSOR POWER SUPPLY 2 CIRCUIT 

    Refer to Diagnosis Procedure .

    Is inspection result normal?

    YES

    Perform the trouble diagnosis for power supply circuit.

    NO

    Repair or replace error-detected parts.

  5. CHECK EOP SENSOR GROUND CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Check the continuity between EOP sensor harness connector and ECM harness connector.

      +

      -

      Continuity

      EOP sensor

      ECM

      Connector

      Terminal

      Connector

      Terminal

      F87

      1

      F91

      45

      Existed
    4. Also check harness for short to power.

    Is inspection result normal?

    YES

    GO TO 6.

    NO

    Repair or replace error-detected parts.

  6. CHECK ECM GROUND CIRCUIT 

    Check the continuity between ECM harness connector and ground.

    +

    -

    Continuity

    ECM

    Connector

    Terminal

    F91

    5

    Ground

    Existed

    65

    F90

    69

    70

    E31

    157

    159

    162

    Is inspection result normal?

    YES

    Check intermittent incident. Refer to Intermittent Incident .

    NO

    Repair or replace error-detected parts.

  7. CHECK EOP SENSOR SIGNAL CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Check the continuity between EOP sensor harness connector and ECM harness connector.

      +

      -

      Continuity

      EOP sensor

      ECM

      Connector

      Terminal

      Connector

      Terminal

      F87

      2

      F91

      46

      Existed
    4. Also check harness for short to ground and to power.

    Is inspection result normal?

    YES

    GO TO 8.

    NO

    Repair or replace error-detected parts.

  8. CHECK EOP SENSOR 

    Refer to Component Inspection .

    Is inspection result normal?

    YES

    Check intermittent incident. Refer to Intermittent Incident .

    NO

    Repair or replace error-detected parts.

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