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Home >> Infiniti >> 2012 >> QX56 AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS U0101 To P0153 >> DTC P0090: High Pressure Fuel Pump >> DTC Logic >> DTC Confirmation Procedure

DTC Confirmation Procedure

  1. PRECONDITIONING

    If DTC CONFIRMATION PROCEDURE has been previously conducted, always perform the following procedure before conducting the next test.

    1. Turn ignition switch OFF and wait at least 10 seconds.
    2. Turn ignition switch ON.
    3. Turn ignition switch OFF and wait at least 10 seconds.

    TESTING CONDITION: 

    • Before performing the following procedure, confirm that battery voltage is 11 V or more at idle. 
    • Before performing the following procedure, check that the fuel tank is 1/8 full of fuel. 

    : GO TO 2.

  2. PERFORM DTC CONFIRMATION PROCEDURE-I

    WITH CONSULT

    1. Start engine.
    2. Select "COOLAN TEMP/S" in "DATA MONITOR" mode of "ENGNE" using CONSULT.
    3. Maintain the following condition for 5 seconds or more at idle.
      COOLAN TEMP/S : 70°C (104°F) or more
    4. Check 1st trip DTC.

    WITH GST

    Follow the above steps for "WITH CONSULT".

    Is 1st trip DTC detected? 

    YES: Proceed to "DIAGNOSIS PROCEDURE ".

    NO: INSPECTION END