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Home >> Infiniti >> 2019 >> QX50 Essential, 4WD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTC/Circuit Diagnosis) (11 Of 12) >> DTC/Circuit Diagnosis >> DTC P34AF: Electric Intake Valve Timing Control Position Sensor >> Diagnosis Procedure
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Diagnosis Procedure

  1. CHECK ELECTRIC INTAKE VALVE TIMING (IVT) CONTROL POSITION SENSOR CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect electric IVT control position sensor harness connector.
    3. Disconnect electric IVT control module harness connector.
    4. Check the continuity between electric IVT control position sensor harness connector and electric IVT control module harness connector.

      Electric IVT control position sensor

      Electric IVT control module

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      F93

      3

      F91

      9

      Existed

      4

      35

      5

      6

    5. Check harness for short to power and short to ground.

    Is the inspection result normal?

    YES

    GO TO 2

    NO

    Repair or replace error-detected parts.

  2. CHECK INTERMITTENT INCIDENT 

    Check intermittent incident. Refer to Intermittent Incident .

    Is the inspection result normal?

    YES

    Replace electric IVT control actuator. Refer to Exploded View .

    NO

    Repair or replace error-detected parts.