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Home >> Infiniti >> 2023 >> QX55 Essential >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (DTC/Circuit Diagnosis) (3 Of 5) >> DTC/Circuit Diagnosis >> DTC P0452: EVAP Control System Pressure Sensor >> DTC Description >> DTC Confirmation Procedure
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DTC Confirmation Procedure

  1. PRECONDITIONING 

    If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at least 10 seconds before conducting the next test.

    TESTING CONDITION:

    Always perform test at a temperature of 5 deg.C (41 deg.F) or more.

    GO TO 2.

  2. PERFORM DTC CONFIRMATION PROCEDURE 

    SYMBOL With CONSULT

    1. Start the engine and warm it up to normal operating temperature.
    2. Turn ignition switch OFF and wait at least 10 seconds.
    3. Turn ignition switch ON.
    4. Select "DATA MONITOR" mode of "ENGINE" using CONSULT.
    5. Make sure that "FUEL T/TMP SE" indication is more than 0 deg.C (32 deg.F).
    6. Start the engine and wait at least 20 seconds.
    7. Check 1st trip DTC.

    SYMBOL With GST

    1. Start the engine and warm it up to normal operating temperature.
    2. Set voltmeter probes to ECM harness connector terminals as per the following.

      ECM

      Voltage

      Connector

      +

      -

      Terminal

      E16

      131

      158

      Less than 4.2 V

    3. Make sure that the voltage is less than 4.2 V.
    4. Turn ignition switch OFF and wait at least 10 seconds.
    5. Start engine and wait at least 20 seconds.
    6. Check 1st trip DTC.

    Is 1st trip DTC detected?

    YES

    Proceed to Diagnosis Procedure .

    NO

    To check malfunction symptom before repair: Refer to Intermittent Incident .

    NO

    Confirmation after repair: INSPECTION END