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Home >> Infiniti >> 2003 >> QX4 4WD >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0442: EVAP Control System - Small Leak Detected >> DTC Confirmation Test (Using CONSULT-II)
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DTC Confirmation Test (Using CONSULT-II)

NOTE: Before performing test, place vehicle on level ground, ensure fuel tank level is between 1/4-3/4 and ambient temperature is 32-86°F (0-32°C). Ensure EVAP-CPVCSV hoses are installed correctly. Open hood before proceeding. If DTC confirmation procedure had been previously run, turn ignition off and wait at least 10 seconds before continuing.
  1. 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 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 EVP SML LEAK P0442/P1442 of EVAPORATIVE SYSTEM in DTC WORK SUPPORT mode with CONSULT- II. Follow instructions displayed.
    NOTE: If engine speed cannot be maintained within range displayed on CONSULT-II screen, perform basic inspection. See BASIC INSPECTION under THROTTLE POSITION SENSOR, IGNITION TIMING & IDLE SPEED in ON-VEHICLE ADJUSTMENTS article.
  4. If OK is displayed on CONSULT-II, system is okay at this time. If NG is displayed, go to DIAGNOSTIC PROCEDURE .
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