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Home >> Infiniti >> 2018 >> QX60 AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTC/Circuit Diagnosis) (1 Of 6) >> DTC/Circuit Diagnosis >> Trouble Diagnosis - Specification Value >> Component Function Check
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Component Function Check

  1. PRECONDITIONING 

    SYMBOL With CONSULT

    Make sure that all of the following conditions are satisfied.

    TESTING CONDITION

    • Vehicle driven distance: More than 5, 000 km (3, 107 miles)
    • Barometric pressure: 98.3 - 104.3 kPa (1.003 - 1.064 kg/cm 2 , 14.25 - 15.12 psi)
    • Atmospheric temperature: 20 - 30 deg. C (68 - 86 deg. F)
    • Engine coolant temperature: 75 - 95 deg. C (167 - 203 deg. F)
    • Transmission: Warmed-up
    • After the engine is warmed up to normal operating temperature, drive vehicle until "FLUID TEMP" in "Data Monitor" of "TRANSMISSION" indicates more than 60 deg. C (140 deg. F).
    • Electrical load: Not applied
      • Rear window defogger Switch, air conditioner Switch, lighting Switch are OFF. Steering wheel is straight ahead.
    • Engine speed: Idle

    GO TO 2.

  2. CHECK REFERENCE OF DATA MONITOR MODE 

    SYMBOL With CONSULT

    NOTE: Check "Reference" of "Data Monitor" mode in maximum scale display.
    1. Perform Work Procedure .
    2. On CONSULT screen, select "ENGINE">>"Data Monitor".
    3. Select "Reference" and change "DISPLAY TYPE" to "Line Graph".
    4. Select "B/FUEL SCHDL", "A/F ALPHA-B1", "A/F ALPHA-B2", and "MASS AIR FLOW SENSOR (Hz)".
    5. Make sure that monitor items are within the SP value.

    Is the measurement value within the SP value?

    YES

    INSPECTION END

    NO

    Proceed to Diagnosis Procedure .

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