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Home >> Infiniti >> 2012 >> FX35 RWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS U0101 Through P0128 >> DTC P0127: IAT Sensor >> DTC Logic >> DTC Confirmation Procedure
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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: 

      This test may be conducted with the drive wheels lifted in the shop or by driving the vehicle. If a road test is expected to be easier, it is unnecessary to lift the vehicle. 

      : GO TO 2.

  2. PERFORM DTC CONFIRMATION PROCEDURE

    With CONSULT 

    1. Wait until engine coolant temperature is less than 96°C (205°F)
      • Turn ignition switch ON.
      • Select "DATA MONITOR" mode with CONSULT.
      • Check the engine coolant temperature.
      • If the engine coolant temperature is not less than 96°C (205°F), turn ignition switch OFF and cool down engine.
        NOTE: Perform the following steps before engine coolant temperature is above 96°C (205°F):
    2. Turn ignition switch ON.
    3. Select "DATA MONITOR" mode with CONSULT.
    4. Start engine.
    5. Hold vehicle speed at more than 70 km/h (43 MPH) for 100 consecutive seconds.
      CAUTION: Always drive vehicle at a safe speed.
    6. Check 1st trip DTC.

      With GST 

      Follow the procedure "With CONSULT" above.

      Is 1st trip DTC detected? 

      YES: Proceed to "DIAGNOSIS PROCEDURE ".

      NO: INSPECTION END