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Home >> Infiniti >> 2017 >> QX80 Base, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTCS) (3 Of 4) >> DTC/Circuit Diagnosis >> DTC P0549, P2083: Exhaust Gas Temperature Sensor >> DTC Logic >> DTC Confirmation Procedure

DTC Confirmation Procedure

  1. PRECONDITIONING - 1

    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.

    TEST CONDITION:

    Before performing the following procedure, confirm that battery voltage is more than 11 V at idle.

    GO TO STEP 2  .

  2. PRECONDITIONING - 2

    G-20 With CONSULT

    1. Turn ignition switch ON.
    2. Select "COOLANT TEMP/S" in "DATA MONITOR" mode of "ENGINE" using CONSULT.
    3. Check the following conditions:
      COOLANT TEMP/S More than - 30°C (- 22°F)

    NSM020 With GST

    Follow the procedure "With CONSULT" above.

    Is the condition satisfied?

    YES 

    GO TO STEP 4  .

    NO 

    GO TO STEP 3  .

  3. PRECONDITIONING - 3

    G-20 With CONSULT

    1. Start the engine until the following condition is satisfied.
      COOLANT TEMP/S More than - 30°C (- 22°F)
    2. Turn ignition switch OFF and wait at least 10 seconds.
    3. Turn ignition switch ON.
    4. Turn ignition switch OFF and wait at least 10 seconds.

    NSM020 With GST

    Follow the procedure "With CONSULT" above.

    GO TO STEP 4  .

  4. PERFORM DTC CONFIRMATION PROCEDURE

    1. Shift the selector lever to P range.
    2. Start engine and let it idle for at least 20 seconds.
    3. Depress the accelerator pedal for 5 seconds or more.
      NOTE:

      Do not release the accelerator pedal during DTC confirmation procedure.

    4. Check 1st trip DTC.

    Is 1st trip DTC detected?

    YES 

    Proceed to DIAGNOSIS PROCEDURE .

    NO 

    INSPECTION END