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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 89 (Engine Control System (DTC/Circuit Diagnosis) (3 Of 5)) >> DTC/Circuit Diagnosis >> DTC P0520: EOP Sensor >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2018 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK EOP SENSOR POWER SUPPLY-I 
    1. Turn ignition switch OFF.
    2. Disconnect EOP sensor harness connector.
    3. Turn ignition switch ON.
    4. Check the voltage between EOP sensor harness connector terminals.

      EOP sensor

      Voltage

      (Approx.)

      Connector

      +

      -

      terminal

      F80

      3

      1

      5 V

    Is the inspection result normal?

    YES

    GO TO 2.

    NO

    GO TO 4.

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

      EOP sensor

      ECM

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      F80

      2

      F13

      14

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

    Is the inspection result normal?

    YES

    GO TO 3.

    NO

    Repair or replace error-detected parts.

  3. CHECK EOP SENSOR 

    Check EOP sensor. Refer to Component Inspection .

    Is the inspection result normal?

    YES

    INSPECTION END

    NO

    Repair or replace error-detected parts.

  4. CHECK EOP SENSOR POWER SUPPLY-II 

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

    +

    -

    Voltage

    (Approx.)

    EOP sensor

    Connector

    Terminal

    F80

    3

    Ground

    5 V

    Is the inspection result normal?

    YES

    GO TO 6.

    NO

    GO TO 5.

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

      EOP sensor

      ECM

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      F80

      3

      F13

      18

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

    Is the inspection result normal?

    YES

    Check sensor power supply 2 circuit. Refer to Diagnosis Procedure .

    NO

    Repair or replace error-detected parts.

  6. 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.

      EOP sensor

      ECM

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      F80

      1

      F13

      15

      Existed

    Is the inspection result normal?

    YES

    GO TO 7.

    NO

    Repair or replace error-detected parts.

  7. CHECK ECM GROUND CIRCUIT 

    Check the continuity between ECM harness connector and ground.

    ECM

    -

    Continuity

    Connector

    Terminal

    E10

    147

    Ground

    Existed

    149

    152

    F13

    10

    55

    F14

    105

    110

    Is the inspection result normal?

    YES

    INSPECTION END

    NO

    Repair or replace error-detected parts.

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