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Home >> Infiniti >> 2005 >> Q45 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P0441 To P1168 >> DTC P0441: EVAP Control System >> Overall Function Check >> With GST
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With GST

  1. Lift up drive wheels.
  2. Start engine (VDC switch OFF) and warm it up to normal operating temperature.
  3. Turn ignition switch OFF and wait at least 10 seconds.
  4. Start engine and wait at least 70 seconds.
  5. Set voltmeter probes to ECM terminal 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.
    AIR CONDITIONER SWITCH REFERENCE

    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 ECM Terminal 32
    G02369448Courtesy 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.
  9. If NG, go to "DIAGNOSTIC PROCEDURE ".