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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 11 (Engine Control System (DTC/Circuit Diagnosis) (5.6L) (5 Of 6)) >> DTC/Circuit Diagnosis >> DTC P119A: Fuel Rail Pressure Sensor >> DTC Diagnosis Procedure

DTC Diagnosis Procedure

WARNING: This page is about a different variant/trim than selected.
NOTE: Turning the ignition switch ON with FRP sensor harness connector disconnected causes ECM to detect DTC P0190. Be sure to erase the DTC when the diagnosis procedure.
  1. CHECK FUEL RAIL PRESSURE (FRP) SENSOR POWER SUPPLY-I 
    1. Turn ignition switch OFF.
    2. Disconnect FRP sensor connector.
    3. Turn ignition switch ON.
    4. Check the voltage between FRP sensor harness connector terminals.

      FRP sensor

      Voltage

      (Approx.)

      Connector

      +

      -

      terminal

      F91

      3

      1

      5 V

    Inspection result normal?

    YES

    GO TO 7.

    NO

    GO TO 2.

  2. CHECK FRP SENSOR POWER SUPPLY-II 

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

    +

    -

    Voltage

    (Approx.)

    FRP sensor

    Connector

    Terminal

    F91

    3

    Ground

    5 V

    Is inspection result normal?

    YES

    GO TO 5.

    NO

    GO TO 3.

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

      FRP sensor

      ECM

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      F91

      3

      F78

      13

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

    Is inspection result normal?

    YES

    GO TO 4.

    NO

    Repair or replace error-detected parts.

  4. CHECK SENSOR POWER SUPPLY 3 CIRCUIT 

    Perform Diagnosis Procedure .

    Is inspection result normal?

    YES

    Perform the trouble diagnosis for ECM power supply circuit. Refer to DTC Diagnosis Procedure .

    NO

    Repair or replace error-detected parts.

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

      FRP sensor

      ECM

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      F91

      1

      F78

      29

      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 
    1. Check the continuity between ECM harness connector and ground.

      ECM

      --

      Continuity

      Connector

      Terminal

      F78

      10

      Ground

      Existed

      50

      55

      E77

      147

      149

      152
    2. Also check harness for short to power.

    Is the inspection result normal?

    YES

    INSPECTION END

    NO

    Repair or replace error-detected parts.

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

      FRP sensor

      ECM

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      F91

      2

      F78

      25

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

    Is inspection result normal?

    YES

    GO TO 8.

    NO

    Repair or replace error-detected parts.

  8. CHECK FRP SENSOR 

    Check the FRP sensor. Refer to Component Inspection (Fuel Rail Pressure Sensor) .

    Is inspection result normal?

    YES

    INSPECTION END

    NO

    Repair or replace error-detected parts.

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