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Home >> Infiniti >> 2012 >> M37 Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P0460 Through P1217 >> DTC P100A, P100B: VVEL System >> Diagnosis Procedure
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Diagnosis Procedure

  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
      P100A 1 E15 12 F48 1 Existed
      2 Not existed
      25 1 Not existed
      2 Existed
      P100B 2 2 F49 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 F40, E20
    • 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. Go to "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. Go to "WORK PROCEDURE ".

      : 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 P100A or P100B 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. Go to "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. Go to "SPECIAL REPAIR REQUIREMENT ".

      : INSPECTION END

  13. CHECK INTERMITTENT INCIDENT 

    Refer to "INTERMITTENT INCIDENT ".

    : INSPECTION END

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