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Home >> Infiniti >> 2008 >> EX35 Base, AWD >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System - DTCS U1000 To P0153 >> P0075, P0081 IVT Control Solenoid Valve >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK INTAKE VALVE TIMING CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT
    1. Turn ignition switch OFF.
    2. Disconnect intake valve timing control solenoid valve harness connector.
    3. Turn ignition switch ON.
    4. Check the voltage between intake valve timing (IVT) control solenoid valve harness connector and ground.
      VOLTAGE SPECIFICATIONS

      DTC IVT control solenoid valve Ground Voltage
      Bank Connector Terminal
      P0075 1 F28 2 Ground Battery voltage
      P0081 2 F29 2

    Is the inspection result normal? 

    YES: GO TO  3.

    NO: GO TO 2.

  2. DETECT MALFUNCTIONING PART

    Check the following.

    • Harness connectors E3, F1
    • Harness for open or short between intake valve timing control solenoid valve and IPDM E/R

      Repair open circuit or short to ground or short to power in harness or connectors.

  3. CHECK INTAKE VALVE TIMING CONTROL SOLENOID VALVE OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Check the continuity between intake valve timing (IVT) control solenoid valve harness connector and ECM harness connector.
      CONTINUITY SPECIFICATIONS

      DTC IVT control solenoid valve ECM Continuity
      Bank Connector Terminal Connector Terminal
      P0075 1 F28 1 F101 18 Existed
      P0081 2 F29 1 29
    4. Also check harness for short to ground and short to power.

    Is the inspection result normal? 

    YES: GO TO 4.

    NO: Repair open circuit or short to ground or short to power in harness or connectors.

  4. CHECK INTAKE VALVE TIMING CONTROL SOLENOID VALVE

    Refer to "COMPONENT INSPECTION ".

    Is the inspection result normal? 

    YES: GO TO 5.

    NO: Replace malfunctioning intake valve timing control solenoid valve.

  5. CHECK INTERMITTENT INCIDENT

    Refer to "INTERMITTENT INCIDENT ".

    INSPECTION END