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HOMESERVICE MANUALSINFINITI2013QX56 RWDREPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROL SYSTEM - DTCS P0500 TO P1424DTC P1090, P1093: VVEL ACTUATOR MOTORDIAGNOSIS PROCEDURE
2013 Infiniti QX56 RWD

Diagnosis Procedure

2013 Infiniti QX56 RWDSECTION Diagnosis Procedure
  1. 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 F56 12 F73 1 Existed
      2 Not existed
      25 1 Not existed
      2 Existed
      P1093 2 2 F71 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  3.

      NO: GO TO 2.

  2. 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.

  3. CHECK VVEL ACTUATOR MOTOR ASSEMBLY 

    Refer to "COMPONENT INSPECTION (VVEL ACTUATOR MOTOR ASSEMBLY) ".

    Is the inspection result normal? 

    YES: GO TO  5.

    NO: GO TO 4.

  4. REPLACE VVEL ACTUATOR MOTOR ASSEMBLY 

    Replace VVEL actuator motor assembly. Refer to "REMOVAL AND INSTALLATION ".

    : INSPECTION END

  5. CHECK INTERMITTENT INCIDENT 

    Refer to "INTERMITTENT INCIDENT ".

    Is the inspection result normal? 

    YES: GO TO 6.

    NO: Repair or replace.

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

      : GO TO 7.

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

      See "DTC LOGIC ".

      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: GO TO  12.

    NO: GO TO 11.

  11. REPLACE VVEL LADDER ASSEMBLY 

    Replace VVEL ladder assembly. Refer to "REMOVAL AND INSTALLATION ".

    : INSPECTION END

  12. CHECK INTERMITTENT INCIDENT 

    Refer to "INTERMITTENT INCIDENT ".

    : INSPECTION END

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.