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Home >> Nissan-Datsun >> 2004 >> Altima S, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1183 (Engine Control System - DTCS U0101 To P0183 (VQ40DE)) >> DTC P0075, P0081: IVT Control Solenoid Valve >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2012 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.
  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.
      Fig 1: Identifying Intake Valve Timing Control Solenoid Valve Harness Connector
      G08170410Courtesy of NISSAN NORTH AMERICA, INC.
    3. Turn ignition switch ON.
    4. Check voltage between intake valve timing control solenoid valve terminal 2 and ground with CONSULT or tester.

    Voltage: Battery voltage 

    Fig 2: Checking Voltage Between Intake Valve Timing Control Solenoid Valve Terminal 2 And Ground Using Tester
    G08170411Courtesy of NISSAN NORTH AMERICA, INC.

    OK or NG 

    OK: GO TO  3.

    NG: GO TO 2.

  2. DETECT MALFUNCTIONING PART

    Check the following.

    • Harness connectors E2, F32
    • Harness connectors F26, F225 (bank 1)
    • Harness for open or short between intake valve timing control solenoid valve and IPDM E/R
    • Harness for open or short between intake valve timing control solenoid valve and ECM

    Repair 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 harness continuity between ECM terminal 11 (bank 1) or 10 (bank 2) and intake valve timing control solenoid valve terminal 1. Refer to WIRING DIAGRAM .

      Continuity should exist  .

    4. Also check harness for short to ground and short to power.

    OK or NG 

    OK: GO TO  5.

    NG: GO TO 4.

  4. DETECT MALFUNCTIONING PART

    Check the following.

    • Harness connectors F26, F225 (bank 1)
    • Harness for open and short between ECM and intake valve timing control solenoid valve

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

  5. CHECK INTAKE VALVE TIMING CONTROL SOLENOID VALVE

    Refer to "COMPONENT INSPECTION ".

    OK or NG 

    OK: GO TO 6.

    NG: Replace malfunctioning intake valve timing control solenoid valve. Refer to "EXPLODED VIEW ".

  6. CHECK INTERMITTENT INCIDENT

    Refer to "INTERMITTENT INCIDENT ".

    >> INSPECTION END 

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