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Home >> Infiniti >> 1995 >> Q45 Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes 4.5L >> Diagnostic Trouble Code (DTC) Testing >> DTC 45: Injector Leak
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DTC 45: Injector Leak

  1. Clear Self-Learning Data

    Clear self-learning data. Start engine and bring to operating temperature. Stop engine and disconnect Mass Airflow (MAF) sensor connector. Start engine and run for at least 30 seconds at 2000 RPM. See Fig 1 . Stop engine and connect MAF sensor connector. En sure DTC 12 is displayed in Diagnostic Test Mode II. Erase self-diagnostic memory. Ensure DTC 55 is displayed in Diagnostic Test Mode II. See ENTERING SELF-DIAGNOSTICS  .

  2. Clear Self-Learning Data Using CONSULT

    Select SELF-LEARNING CONT in ACTIVE TEST mode with CONSULT. Clear self-learning control coefficient by touching CLEAR.
    Fig 1: DTC 45, Clearing Self-Learning Data (Q45)
    G93J78567Courtesy of NISSAN MOTOR CO., U.S.A.

  3. Perform Diagnostic Test Mode II (Self-Diagnostic Results)

    If DTC does not return, inspection is completed. If DTC 45 displays, relieve fuel pressure and remove injector assembly. See N - REMOVE/INSTALL/OVERHAUL article. Do not remove fuel hose or injectors from injector gallery. Turn ignition on. Ensure fuel does not drip from injector(s). Replace any injector(s) that drip fuel. Perform FINAL CHECK  .
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