2004 Nissan-Datsun Sentra SE-RFACTORY OEM SERVICE PROCEDURE

Diagnostic Procedure

  1. CHECK OVERALL FUNCTION 

    WITH CONSULT-II 

    1. Start engine and warm it up to normal operating temperature.
    2. Perform "VIAS SOL VALVE" in "ACTIVE TEST" mode with CONSULT-II.
      Fig 1: Displaying ACTIVE TEST With Mode Consult-II
      G00779548Courtesy of NISSAN MOTOR CO., U.S.A.
    3. Turn VIAS control solenoid valve "ON" and "OFF", and make sure that power valve actuator rod moves.
      4. Fig 2: Ensuring Power Valve Actuator Rod Moves
      G00779549Courtesy of NISSAN MOTOR CO., U.S.A.

    WITHOUT CONSULT-II 

    1. Start engine and warm it up to normal operating temperature.
    2. Rev engine quickly up to above 5, 000 RPM and make sure that power valve actuator rod moves.
    Fig 3: Ensuring Power Valve Actuator Rod Moves
    G00779550Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    1. OK: INSPECTION END 
    2. NG (With CONSULT-II): GO TO 2.
    3. NG (Without CONSULT-II): GO TO  3.
  2. CHECK VACUUM EXISTENCE 

    WITH CONSULT-II 

    1. Stop engine and disconnect vacuum hose connected to power valve actuator.
    2. Start engine and let it idle.
    3. Perform "VIAS SOL VALVE" in "ACTIVE TEST" mode with CONSULT-II.
    4. Turn VIAS control solenoid valve "ON" and "OFF", and check vacuum existence under the following conditions.
      5. Fig 4: Displaying ACTIVE TEST" With Mode Consult-II
      G00779552Courtesy of NISSAN MOTOR CO., U.S.A.
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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