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Home >> Infiniti >> 2012 >> QX56 AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS U0101 To P0153 >> DTC P0087: FRP Control System >> DTC Logic >> DTC Confirmation Procedure
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DTC Confirmation Procedure

  1. CHECK FUEL LEAKAGE
    1. Turn ignition switch ON.
    2. Visually check the piping between low pressure fuel pump and fuel injectors for fuel leakage.
    3. Start the engine.
    4. Visually check the piping between low pressure fuel pump and fuel injectors for fuel leakage.

    Is inspection result normal? 

    YES: GO TO 2.

    NO: Repair or replace error-detected parts.

  2. 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 3.

  3. PERFORM DTC CONFIRMATION PROCEDURE-1

    WITH CONSULT

    1. Turn ignition switch ON.
    2. Select "COOLAN TEMP/S" in "DATA MONITOR" mode of "ENGNE" using CONSULT.
    3. Check the following condition;.
    COOLAN TEMP/S : 5 - 40°C (41 - 104°F)

    WITH GST

    Follow the above steps for "WITH CONSULT".

    Is the condition satisfied? 

    YES: GO TO 4.

    NO: 1. Satisfy the condition. 2. Retry from step 1.

  4. PERFORM DTC CONFIRMATION PROCEDURE-2

    WITH CONSULT

    1. Start the engine and let it idle for 10 seconds.
    2. Check 1st trip DTC.

    WITH GST

    Follow the above steps for "WITH CONSULT".

    Is 1st trip DTC detected? 

    YES: Proceed to "DIAGNOSIS PROCEDURE ".

    NO: GO TO 5.

  5. PERFORM DTC CONFIRMATION PROCEDURE-3

    WITH CONSULT

    1. Select "COOLAN TEMP/S" in "DATA MONITOR" mode of "ENGINE" using CONSULT.
    2. Maintain the following condition for 10 seconds or more at idle.
      COOLAN TEMP/S : 70°C (104°F) or more
    3. 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.