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Home >> Infiniti >> 2013 >> FX37 Base, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 11 (Engine Control System - DTCS P0460 Through P1211) >> DTC P1090,: P1093 VVEL Actuator Motor >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2013 Infiniti FX50. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK GROUND CONNECTION 
    1. Turn ignition switch OFF.
    2. Check ground connection M95. Refer to Ground Inspection in "CIRCUIT INSPECTION ".

      Is the inspection result normal? 

      YES: GO TO 2.

      NO: Repair or replace ground connection.

  2. VVEL ACTUATOR MOTOR OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 
    1. Disconnect VVEL control module harness connector.
    2. Disconnect VVEL actuator motor harness connector.
    3. Check the continuity between VVEL control module harness connector and VVEL actuator motor harness connector.
      DTC No. VVEL control module VVEL actuator motor Continuity
      Bank Connector Terminal Connector Terminal
      P1090 1 E16 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  4.

      NO: GO TO 3.

  3. DETECT MALFUNCTIONING PART 

    Check the following.

    • Harness connectors F10, E10
    • Harness for open or short between VVEL actuator motor and VVEL control module

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

  4. CHECK VVEL ACTUATOR MOTOR 

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

    Is the inspection result normal? 

    YES: GO TO  6.

    NO: GO TO 5.

  5. REPLACE VVEL ACTUATOR SUB ASSEMBLY 
    1. Replace VVEL actuator sub assembly.
    2. Perform "SPECIAL REPAIR REQUIREMENT ".

      : INSPECTION END

  6. CHECK INTERMITTENT INCIDENT 

    Refer to "INTERMITTENT INCIDENT ".

    Is the inspection result normal? 

    YES: GO TO 7.

    NO: Repair or replace.

  7. REPLACE VVEL CONTROL MODULE 
    1. Replace VVEL control module.
    2. Perform "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT (VVEL CONTROL MODULE): SPECIAL REPAIR REQUIREMENT ".

      : GO TO 8.

  8. 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 9.

      NO: INSPECTION END

  9. CHECK VVEL ACTUATOR SUB ASSEMBLY 

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

    Is the inspection result normal? 

    YES: GO TO  11.

    NO: GO TO 10.

  10. REPLACE VVEL ACTUATOR SUB ASSEMBLY 
    1. Replace VVEL actuator sub assembly.
    2. Perform "SPECIAL REPAIR REQUIREMENT ".

      : INSPECTION END

  11. CHECK VVEL LADDER ASSEMBLY 

    Refer to "INSPECTION ".

    Is the inspection result normal? 

    YES: GO TO  13.

    NO: GO TO 12.

  12. REPLACE CYLINDER HEAD, VVEL LADDER ASSEMBLY AND VVEL ACTUATOR SUB ASSEMBLY 
    1. Replace cylinder head, VVEL ladder assembly and VVEL actuator sub assembly.
    2. Perform "SPECIAL REPAIR REQUIREMENT ".

      : INSPECTION END

  13. CHECK INTERMITTENT INCIDENT 

    Refer to "INTERMITTENT INCIDENT ".

    : INSPECTION END

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