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Home >> Infiniti >> 2015 >> QX60 Base, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 117 (Engine Control System (DTC/Circuit Diagnosis) (VQ35DE) (Except Hybrid) (2 Of 3)) >> DTC/Circuit Diagnosis >> DTC P052A, P052B, P052C, P052D: Intake Valve Timing Control >> Diagnosis Procedure >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2016 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.

  1. INSPECTION START

    With CONSULT 

    GO TO STEP 2  .

    Without CONSULT 

    GO TO STEP 3  .

  2. CHECK VTC POSITION

    G-20 With CONSULT

    1. Turn ignition switch ON.
    2. On the CONSULT screen, select "ENGINE" >> "DATA MONITOR" >> "COOLAN TEMP/S".
    3. Check that the "COOLAN TEMP/S" indication value is between - 5°C (23°F) and 45°C (113°F).
    4. Start engine and wait at least 5 seconds.
    5. On the CONSULT screen, select "ENGINE" >> "DATA MONITOR" >> "INT/V TIM (B1)".
    6. Check that the data monitor item indicates as follows:
      Item Value (°CA)
      INT/V TIM (B1) 10 +- 2
      INT/V TIM (B2) 10 +- 2

    Is the inspection result normal?

    YES 

    Check intermittent incident. Refer to INTERMITTENT INCIDENT .

    NO 

    GO TO STEP 3  .

  3. CHECK OIL PRESSURE WARNING LAMP

    1. Start engine.
    2. Check that oil pressure warning lamp is not illuminated.
      G04073790Courtesy of NISSAN NORTH AMERICA, INC.

    Is oil pressure warning lamp illuminated?

    YES 

    Refer to INSPECTION .

    NO 

    GO TO STEP 4  .

  4. CHECK INTAKE VALVE TIMING INTERMEDIATE LOCK CONTROL SOLENOID VALVE

    Perform Component Inspection of the intake valve timing intermediate lock control solenoid valve. Refer to COMPONENT INSPECTION (INTAKE VALVE TIMING INTERMEDIATE LOCK CONTROL SOLENOID VALVE) .

    Is the inspection result normal?

    YES 

    GO TO STEP 5  .

    NO 

    Repair or replace error-detected parts.

  5. CHECK INTAKE VALVE TIMING CONTROL SOLENOID VALVE

    Perform Component Inspection of the intake valve timing control solenoid valve. Refer to COMPONENT INSPECTION (INTAKE VALVE TIMING CONTROL SOLENOID VALVE) .

    Is the inspection result normal?

    YES 

    GO TO STEP 6  .

    NO 

    Repair or replace error-detected parts.

  6. CHECK CRANKSHAFT POSITION SENSOR

    Perform Component Inspection of the crankshaft position sensor. Refer to COMPONENT INSPECTION (CRANKSHAFT POSITION SENSOR) .

    Is the inspection result normal?

    YES 

    GO TO STEP 7  .

    NO 

    Repair or replace error-detected parts.

  7. CHECK CAMSHAFT POSITION SENSOR

    Perform Component Inspection of the camshaft position sensor. Refer to COMPONENT INSPECTION (CAMSHAFT POSITION SENSOR) .

    Is the inspection result normal?

    YES 

    GO TO STEP 8  .

    NO 

    Repair or replace error-detected parts.

  8. CHECK CAMSHAFT (INTAKE)

    Check the following.

    1. Accumulation of debris on the signal plate of camshaft front end
      G08682372Courtesy of NISSAN NORTH AMERICA, INC.
    2. Chipping signal plate of camshaft front end

    Is the inspection result normal?

    YES 

    GO TO STEP 9  .

    NO 

    Remove debris and clean the signal plate of camshaft front end or replace camshaft. Refer to REMOVAL AND INSTALLATION .

  9. CHECK TIMING CHAIN INSTALLATION

    Check service records for any recent repairs that may cause timing chain misalignment.

    Are there any service records that may cause timing chain misalignment?

    YES 

    Check timing chain installation. Refer to REMOVAL AND INSTALLATION .

    NO 

    GO TO STEP 10  .

  10. CHECK LUBRICATION CIRCUIT

    Perform "Inspection of Camshaft Sprocket (INT) Oil Groove". Refer to INSPECTION AFTER INSTALLATION .

    Is the inspection result normal?

    YES 

    Check intermittent incident. Refer to INTERMITTENT INCIDENT .

    NO 

    Clean lubrication line.

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