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Home >> Infiniti >> 2003 >> QX4 RWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0442: EVAP Control System - Small Leak Detected >> DTC Confirmation Test (Using Generic Scan Tool)
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DTC Confirmation Test (Using Generic Scan Tool)

NOTE: Before performing test, ensure fuel tank level is 1/4-3/4, ambient temperature is 32-86°F (0-32°C). Ensure EVAP-CPVCSV hoses are installed correctly. Open hood before proceeding.
  1. Start engine. Drive vehicle according to specified driving pattern to set System Readiness Test (SRT) codes. See DRIVE CYCLES . Stop vehicle and go to next step.
  2. Select MODE 1 on scan tool and check SRT status of EVAP system. If EVAP system SRT is complete, system is okay at this time. If EVAP system SRT is incomplete, turn ignition off, wait at least 10 seconds and go to next step.
    3. NOTE: It is not necessary to allow engine to cool before driving vehicle.
  3. Perform driving pattern again. Select MODE 3 on scan tool. If DTC P0442 is set, go to DIAGNOSTIC PROCEDURE . If DTC P0441 is set, go to DIAGNOSTIC PROCEDURE  under DTC P0441: EVAP CONTROL SYSTEM - INCORRECT PURGE FLOW. If DTC P0441 and/or P0442 are not set, go to next step.
  4. Select MODE 1 with scan tool. If EVAP system SRT is complete, system is okay at this time. If EVAP system SRT is not complete, repeat procedure starting in step  3.
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