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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 P1448: EVAP Canister Vent Control Valve Open >> 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.
NOTE: If DTC confirmation test has been previously performed, always turn ignition off and wait at least 10 seconds before performing next DTC confirmation test.
NOTE: Perform DTC WORK SUPPORT when fuel level is between 1/4 and 3/4 and vehicle is placed on a level surface. Perform test when ambient temperature is 32-86°F (0-30°C).

With CONSULT-II

  1. Open hood. Turn ignition on. Turn ignition off and wait at least 10 seconds. Turn ignition on and select DATA MONITOR mode with CONSULT-II.
  2. Ensure the following conditions are met:
    • COOLAN TEMP/S: 32-158°F (0-70°C).
    • INT/A TEMP SE: 32-86°F (0-30°C).
  3. Select EVAP SML LEAK P0442/P1442 of EVAPORATIVE SYSTEM in DTC WORK SUPPORT mode with CONSULT- II.
  4. Follow instructions displayed on CONSULT-II. If engine speed cannot be maintained within range displayed on CONSULT-II screen, perform BASIC INSPECTION. See ON-VEHICLE ADJUSTMENTS article.
  5. If OK is displayed, system is okay at this time. If NG is displayed, go to next step.
    NOTE: Ensure EVAP hoses are connected to EVAP canister purge volume control solenoid valve properly.
  6. Stop engine and wait at least 5 seconds. Turn ignition on. Disconnect hose from water separator. See Figure . Select VENT CONTROL/V of ACTIVE TEST mode with CONSULT-II.
  7. Touch ON and OFF alternately. When VENT CONTROL/V is ON, air should flow between ports "A" and "B". See Figure . When VENT CONTROL/V is OFF, air should not flow between ports "A" and "B".
  8. If operation is not as specified, go to DIAGNOSTIC PROCEDURE  . If operation is as specified, go to DIAGNOSTIC PROCEDURE  under DTC P0442: EVAP CONTROL SYSTEM.
NOTE: Use the following test to check overall function of EVAP-CVCV circuit. During this test, DTC may not be confirmed.

With Generic Scan Tool (Overall Function Check)

  1. Disconnect hose from water separator. See Figure . Disconnect EVAP-CVCV harness connector. Using jumper wires, apply battery voltage to EVAP-CVCV terminals. See Figure . Air should not flow through EVAP-CVCV. Remove jumper wires. Air should flow.
  2. If operation is not as specified, go to DIAGNOSTIC PROCEDURE  . If operation is as specified, go to DIAGNOSTIC PROCEDURE  under DTC P0442: EVAP CONTROL SYSTEM.
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