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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 220 (Engine Control System (DTCS) (5.6L) (6 Of 8)) >> DTC/Circuit Diagnosis >> P0454 EVAP SYS Pres Sen >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2018 Nissan Titan XD and 2018 Nissan Titan. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR FOR WATER 
    1. Turn ignition switch OFF.
    2. Disconnect EVAP control system pressure sensor harness connector.
    3. Check sensor harness connector for water.

      Water should not exist.

    Is the inspection result normal?

    YES

    GO TO 2 .

    NO

    Repair or replace harness connector.

  2. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR POWER SUPPLY 
    1. Turn ignition switch ON.
    2. Check the voltage between EVAP control system pressure sensor harness connector and ground.

      +

      -

      Voltage

      (Approx.)

      EVAP control system pressure sensor

      Connector

      Terminal

      C32

      3

      Ground

      5 V

    Is the inspection result normal?

    YES

    GO TO 4 .

    NO

    GO TO 3 .

  3. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR POWER SUPPLY CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Check the continuity between EVAP control system pressure sensor harness connector and ECM harness connector.

      EVAP control system pressure sensor

      ECM

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      C32

      3

      E16

      125

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

    Is the inspection result normal?

    YES

    Perform the trouble diagnosis for power supply circuit.

    NO

    Repair or replace malfunctioning part.

  4. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR GROUND CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Check the continuity between EVAP control system pressure sensor harness connector and ECM harness connector.

      EVAP control system pressure sensor

      ECM

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      C32

      1

      E16

      148

      Existed
    4. Also check harness for short to power.

    Is the inspection result normal?

    YES

    GO TO 5 .

    NO

    Repair or replace malfunctioning part.

  5. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR SIGNAL CIRCUIT 
    1. Check the continuity between EVAP control system pressure sensor harness connector and ECM harness connector.

      EVAP control system pressure sensor

      ECM

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      C32

      2

      E16

      121

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

    Is the inspection result normal?

    YES

    GO TO 6 .

    NO

    Repair or replace malfunctioning part.

  6. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR 

    Check the EVAP control system pressure sensor. Refer to Component Inspection .

    Is the inspection result normal?

    YES

    INSPECTION END

    NO

    Replace EVAP control system pressure sensor.

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