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Home >> Infiniti >> 2017 >> QX80 Base, RWD >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (DTCS) (1 Of 4) >> DTC/Circuit Diagnosis >> Trouble Diagnosis - Specification Value >> Component Function Check >> Diagnostic Test
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Diagnostic Test

  1. PRECONDITIONING

    Check 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 (0.983 - 1.043 bar, 1.003 - 1.064 kg/cm2 , 14.25 - 15.12 psi)
    • Atmospheric temperature: 20 - 30°C (68 - 86°F)
    • Engine coolant temperature: 75 - 95°C (167 - 203°F)
    • Transmission: Warmed-up
      • After the engine is warmed up to normal operating temperature, drive vehicle until "ATF TEMP 2" (A/T fluid temperature sensor signal) indicates more than 60°C (140°F).
    • Electrical load: Not applied
      • Rear window defogger switch, air conditioner switch and lighting switch are OFF. Steering wheel is straight ahead.
    • Engine speed: Idle
    • Gear position: Neutral (or parking)

    GO TO STEP 2  .

  2. PERFORM SPEC IN DATA MONITOR MODE

    G-20 WITH CONSULT

    NOTE:

    Perform "SPEC" in "DATA MONITOR" mode in maximum scale display.

    1. Perform WORK PROCEDURE .
    2. Select "B/FUEL SCHDL", "A/F ALPHA-B1", "A/F ALPHA-B2", "MAS A/F SE-B1" in "SPEC" of "DATA MONITOR" mode with CONSULT.
    3. Check that monitor items are within the SP value.

    Is the measurement value within the SP value?

    YES 

    INSPECTION END

    NO 

    Proceed to DIAGNOSIS PROCEDURE .