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HOMESERVICE MANUALSNISSAN-DATSUN2004ALTIMA S, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCEENGINE CONTROL SYSTEM - 2.5LDTC P0441: EVAP CONTROL SYSTEMOVERALL FUNCTION CHECKWITH GST
2004 Nissan-Datsun Altima S, Automatic

With GST

2004 Nissan-Datsun Altima S, AutomaticSECTION With GST
  1. Lift up drive wheels.
  2. Start engine and warm it up to normal operating temperature.
  3. Turn ignition switch OFF, wait at least 10 seconds.
  4. Start engine and wait at least 70 seconds.
  5. Set voltmeter probes to ECM terminals 32 (EVAP control system pressure sensor signal) and ground.
  6. Check EVAP control system pressure sensor value at idle speed and note it.
  7. Establish and maintain the following conditions for at least 1 minute.
    ENGINE SPEED AND GEAR POSITION

    Air conditioner switch ON
    Headlamp switch ON
    Rear window defogger switch ON
    Engine speed Approx. 3, 000 RPM
    Gear position Any position other than P, N or R
    Fig 1: Checking Voltage Between ECM Terminals 32 (EVAP Control System Pressure Sensor Signal) & Ground
    G02884441Courtesy of NISSAN MOTOR CO., U.S.A.
  8. Verify that EVAP control system pressure sensor value stays 0.1V less than the value at idle speed (measured at step  6) for at least 1 second. E
  9. If NG, go to "DIAGNOSTIC PROCEDURE ".
RENDER: 1.0x

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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.