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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 P1091: VVEL Actuator Motor Relay >> DTC Diagnosis Procedure

DTC Diagnosis Procedure

WARNING: This page is about a different variant/trim than selected.
  1. VVEL ACTUATOR MOTOR RELAY POWER SUPPLY CIRCUIT-I 
    1. Turn ignition switch OFF.
    2. Disconnect VVEL actuator motor relay.
    3. Check the voltage between VVEL actuator motor relay harness connector and ground.

      VVEL actuator motor relay

      Ground

      Voltage

      Connector

      Terminal

      E100

      1

      Ground

      Battery voltage

      3

    Is the inspection result normal?

    YES

    GO TO 3.

    NO

    GO TO 2.

  2. DETECT MALFUNCTIONING PART 

    Check the following.

    • 50A fusible link (letter R)
    • Harness for open or short between VVEL actuator motor relay and battery

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

  3. VVEL ACTUATOR MOTOR RELAY POWER SUPPLY CIRCUIT-II 
    1. Disconnect VVEL control module harness connector.
    2. Check the continuity between VVEL actuator motor relay harness connector and VVEL control module harness connector.

      VVEL control module

      VVEL actuator motor relay

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      F84

      23

      E100

      2

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

    Is the inspection result normal?

    YES

    GO TO 4.

    NO

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

  4. VVEL ACTUATOR MOTOR RELAY INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 
    1. Check the continuity between VVEL actuator motor relay harness connector and VVEL control module harness connector.

      VVEL control module

      VVEL actuator motor relay

      Continuity

      Bank

      Connector

      Terminal

      Connector

      Terminal

      1

      F84

      13

      E100

      5

      Existed

      2

      1
    2. Also check harness for short to ground and power.

    Is the inspection result normal?

    YES

    GO TO 5.

    NO

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

  5. CHECK VVEL ACTUATOR MOTOR RELAY 

    Refer to Component Inspection (VVEL Actuator Motor Relay) .

    Is the inspection result normal?

    YES

    GO TO 6.

    NO

    Replace VVEL actuator motor relay.

  6. CHECK ABORT CIRCUIT FOR OPEN AND SHORT 
    1. Disconnect ECM harness connector.
    2. Check the continuity between VVEL control module harness connector and ECM harness connector.

      VVEL control module

      ECM

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      F84

      21

      F79

      90

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

    Is the inspection result normal?

    YES

    GO TO 8.

    NO

    GO TO 7.

  7. DETECT MALFUNCTIONING PART 

    Check the following.

    • Harness for open and short between ECM 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.

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

    GO TO 9.

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

      See DTC Description .

    Is the DTC P1091 displayed again?

    YES

    Replace ECM. Refer to Removal and Installation .

    NO

    INSPECTION END

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