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Home >> Nissan-Datsun >> 2003 >> Sentra Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 39 (Engine Controls - Self-Diagnostics - 1.8L - XE, GXE) >> Diagnostic Tests >> DTC P0441: EVAP Control System Incorrect Purge Flow >> DTC Confirmation Test

DTC Confirmation Test

WARNING: This page is about a different car, the 2002 Nissan Sentra. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: Always drive vehicle at a safe speed.
NOTE: For best results, perform test at a temperature of 32°F (0°C) or more.

With CONSULT-II

  1. Start engine and warm to normal operating temperature.
  2. Turn ignition off and wait at least 10 seconds.
  3. Start engine and let it idle for at least 70 seconds.
  4. Select PURG FLOW P0441 of EVAPORATIVE SYSTEM in DTC CONFIRMATION mode with CONSULT-II.
  5. Press START. If COMPLETED is displayed, go to step  7 . If COMPLETED is not displayed, go to next step.
  6. When the following conditions are met, TESTING will be displayed on CONSULT-II screen:
    • Vehicle speed: 20-75 MPH.
    • ENG SPEED: 500-3800 RPM.
    • B/FUEL SCHDL: 1.0-6.2 msec.
    • Engine coolant temperature: more than 158°F (70°C).

    Maintain conditions continuously until TESTING changes to COMPLETED (it will take at least 35 seconds).

    NOTE: If TESTING does not change to COMPLETED, retry from step  2 .
  7. Press SELF-DIAG RESULTS. If NG is displayed, go to DIAGNOSTIC PROCEDURE  . If OK is displayed, system is okay at this time.
NOTE: Use the following test to check overall function of EVAP control system purge flow monitoring. During this test, 1st trip DTC may not be confirmed.

With Generic Scan Tool

  1. Raise drive wheels. Start engine and warm to normal operating temperature. Turn ignition off and wait at least 10 seconds.
  2. Start engine and wait at least 70 seconds. Measure and record voltage between ground and ECM terminal No. 84 (EVAP-CSPS signal circuit) by backprobing. See Figure and Figure .
  3. While monitoring voltage, maintain the following conditions for at least one minute:
    • A/C switch: ON position.
    • Steering wheel: fully turned.
    • Headlight switch: ON position.
    • Rear window defogger switch: ON position.
    • Engine speed: about 3000 RPM.
    • Transmission: any forward gear.

    Voltage should remain .1 volt less than voltage measured at idle for at least one second.

  4. If voltage is as specified, system is okay at this time. If voltage is not as specified, go to DIAGNOSTIC PROCEDURE  .
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