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Home >> Infiniti >> 2024 >> QX55 Essential >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTC/Circuit Diagnosis) (4 Of 4) >> DTC/Circuit Diagnosis >> P34AF Electric Intake Valve Timing Control Position Sensor >> DTC Description

DTC Description

DTC DETECTION LOGIC 

DTC CONSULT screen terms(Trouble diagnosis content) DTC detection condition
P34AF 00 A camshaft posi actuator posi sens B1(A camshaft position actuator position sensor A circuit high Bank 1) Diagnosis condition Engine speed: 600 - 3, 000 rpm
Signal (terminal) Electric intake valve timing control position sensor signal
Threshold An excessively high voltage from the sensor is sent to the electric IVT control module
Diagnosis delay time 1 second or more

POSSIBLE CAUSE 

FAIL-SAFE 

Engine operating condition in fail-safe mode
Fail safe mode Vehicle behavior
Device fix mode
  • This mode fixes the EVT control solenoid valve in the reference position.
  • The intake manifold runner control valve motor is turned OFF (intake manifold runner control valve opens).
Combustion control mode Stratified charge combustion control at starting No stratified charge combustion at starting (cold start).

DTC CONFIRMATION PROCEDURE 

  1. PRECONDITIONING 

    If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at least 10 seconds before conducting the next test.

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    GO TO 2.

  2. PERFORM DTC CONFIRMATION PROCEDURE 
    1. Maintaining engine speed at more than 2000 rpm for at least 1 seconds.
    2. Check 1st trip DTC.

    Is 1st trip DTC detected?

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    Proceed to Diagnosis Procedure .

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

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    Confirmation after repair: INSPECTION END