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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 P1090: VVEL Actuator Motor >> DTC Diagnosis Procedure

DTC Diagnosis Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK DTC PRIORITY 

    If DTC P1090 or P1093 is displayed with DTC P1091 first perform the trouble diagnosis for DTC P1091.

    Is applicable DTC detected?

    YES

    Perform diagnosis of applicable. Refer to DTC Description .

    NO

    GO TO 2.

  2. VVEL ACTUATOR MOTOR ASSEMBLY OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 
    1. Disconnect VVEL control module harness connector.
    2. Disconnect VVEL actuator motor assembly harness connector.
    3. Check the continuity between VVEL control module harness connector and VVEL actuator motor assembly harness connector.

      DTC No.

      VVEL control module

      VVEL actuator motor assembly

      Continuity

      Bank

      Connector

      Terminal

      Connector

      Terminal

      P1090

      1

      F84

      12

      F88

      1

      Existed

      2

      Not existed

      25

      1

      Not existed

      2

      Existed

      P1093

      2

      2

      F85

      1

      Existed

      2

      Not existed

      15

      1

      Not existed

      2

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

    Is the inspection result normal?

    YES

    GO TO 4.

    NO

    GO TO 3.

  3. DETECT MALFUNCTIONING PART 

    Check the following.

    • Harness for open or short between VVEL actuator motor assembly and VVEL control module
    • Loose or poor connection for each connector and harness

    Repair open circuit, short to ground or short to power in harness or connectors.

  4. CHECK VVEL ACTUATOR MOTOR ASSEMBLY 

    Refer to Component Inspection (VVEL ACTUATOR MOTOR ASSEMBLY) .

    Is the inspection result normal?

    YES

    GO TO 6.

    NO

    GO TO 5.

  5. REPLACE VVEL ACTUATOR MOTOR ASSEMBLY 

    Replace VVEL actuator motor assembly. Refer to Removal and Installation .

    INSPECTION END

  6. REPLACE VVEL CONTROL MODULE 
    1. Replace VVEL control module.
    2. Perform additional service when replacing VVEL control module. Refer to Description .

    GO TO 7.

  7. PERFORM DTC CONFIRMATION PROCEDURE 
    1. Turn ignition switch ON.
    2. Erase DTC.
    3. Perform DTC Confirmation Procedure.

      See DTC Description .

    Is the DTC P1090 or P1093 displayed again?

    YES

    GO TO 8.

    NO

    INSPECTION END

  8. CHECK VVEL ACTUATOR HOUSING ASSEMBLY 

    Refer to Component Inspection (VVEL ACTUATOR MOTOR ASSEMBLY) .

    Is the inspection result normal?

    YES

    GO TO 10.

    NO

    GO TO 9.

  9. REPLACE VVEL ACTUATOR HOUSING ASSEMBLY 

    Replace VVEL actuator housing assembly. Refer to Removal and Installation .

    INSPECTION END

  10. CHECK VVEL LADDER ASSEMBLY 

    Refer to Inspection .

    Is the inspection result normal?

    YES

    INSPECTION END

    NO

    GO TO 11.

  11. REPLACE VVEL LADDER ASSEMBLY 

    Replace VVEL ladder assembly. Refer to Removal and Installation .

    INSPECTION END

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