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Home >> Infiniti >> 2019 >> QX50 Pure, FWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTC/Circuit Diagnosis) (11 Of 12) >> DTC/Circuit Diagnosis >> DTC P2578: TC/SC Speed Sensor A >> Confirmation Procedure
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Confirmation Procedure

  1. PRECONDITIONING 

    If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.

    1. Turn ignition switch OFF and wait at least 10 seconds.
    2. Turn ignition switch ON.
    3. Turn ignition switch OFF and wait at least 10 seconds.

    GO TO 2.

  2. PERFORM DTC CONFIRMATION PROCEDURE 
    NOTE: Before performing this procedure, check that the battery voltage is more than 10 V at idle.
    1. Start engine.
    2. Drive the vehicle at least 2 seconds under the following conditions:

      Engine speed

      More than 1, 400 rpm

      Accelerator pedal

      Depressed more than 50%

      NOTE: The above conditions can be satisfied by accelerating from low speed to full throttle.
    3. Check 1st trip DTC.

    Is DTC P2578 detected?

    YES

    Refer to DTC Diagnosis Procedure .

    NO

    To check malfunction symptom before repair: Refer to Intermittent Incident .

    NO

    Confirmation after repair: INSPECTION END