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HOMESERVICE MANUALSINFINITI2019Q70 3.7 LUXE, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 10 (ENGINE CONTROL SYSTEM (5.6L) (DTC/CIRCUIT DIAGNOSIS) (3 OF 9))DTC/CIRCUIT DIAGNOSISDTC P0196: EOT SENSORDTC LOGICDTC CONFIRMATION PROCEDURE
2019 Infiniti Q70 3.7 Luxe, AWD

DTC Confirmation Procedure

2019 Infiniti Q70 3.7 Luxe, AWDSECTION DTC Confirmation Procedure
WARNING: This page is about a different variant/trim than selected.
  1. INSPECTION START 

    Is it necessary to erase permanent DTC?

    YES

    GO TO 6 .

    NO

    GO TO 2 .

  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.

    GO TO 3 .

  3. PERFORM DTC CONFIRMATION PROCEDURE-I 
    1. Start engine and warm it up to normal operating temperature.
    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.
    5. Start engine and let it idle for 5 minutes and 10 seconds.
    6. Check 1st trip DTC.

    Is 1st trip DTC detected?

    YES

    Proceed to Diagnosis Procedure .

    NO

    GO TO 4 .

  4. PERFORM DTC CONFIRMATION PROCEDURE-II 

    SYMBOL WITH CONSULT

    1. Select "DATA MONITOR" mode with CONSULT.
    2. Check that "COOLAN TEMP/S" indicates above 70 deg.C (158 deg.F).

      If it is above 70 deg.C (158 deg.F), go to the following steps.

      If it is below 70 deg.C (158 deg.F), warm engine up until "COOLAN TEMP/S" indicates more than 70 deg.C (158 deg.F). Then perform the following steps.

    3. Turn ignition switch OFF and soak the vehicle in a cool place.
    4. Turn ignition switch ON.
      NOTE: Do not turn ignition switch OFF until step 8.
    5. Select "DATA MONITOR" mode with CONSULT.
    6. Check the following.

      COOLAN TEMP/S

      Below 40 deg.C (104 deg.F)

      INT/A TEMP SE

      Below 40 deg.C (104 deg.F)

      Difference between "COOLAN TEMP/S" and "INT/A TEMP SE"

      Within 6 deg.C (11 deg.F)

      If they are within the specified range, perform the following steps.

      If they are out of the specified range, soak the vehicle to meet the above conditions. Then perform the following steps.

      NOTE:
      • Do not turn ignition switch OFF.
      • If it is supposed to need a long period of time, do not deplete the battery.
    7. Start engine and let it idle for 5 minutes.
    8. Check 1st trip DTC.

    SYMBOL WITH GST

    Follow the procedure "With CONSULT" above.

    Is 1st trip DTC detected?

    YES

    Diagnosis Procedure .

    NO

    .

  5. PERFORM COMPONENT FUNCTION CHECK (FOR MALFUNCTION B) 

    Perform component function check. Refer to Component Function Check .

    NOTE: Use the component function check to check the overall function of the EOT sensor circuit. During this check, a 1st trip DTC might not be confirmed.

    Is the inspection result normal?

    YES

    INSPECTION END

    NO

    Proceed to Diagnosis Procedure .

  6. 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, do not add fuel.
    • Before performing the following procedure, check that fuel level is between 1/4 and 4/4.
    • Before performing the following procedure, confirm that battery voltage is 11 V or more at idle.

    .

  7. PERFORM DTC CONFIRMATION PROCEDURE B 
    1. Start engine and let it idle for 60 minutes.
    2. Move the vehicle to a cool place.
      NOTE: Cool the vehicle in an environment of ambient air temperature between -10 deg.C (14 deg.F) and 35 deg.C (95 deg.F).
    3. Turn ignition switch OFF and soak the vehicle for 12 hours.
      CAUTION: Never turn ignition switch ON during soaking.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.