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Home >> Infiniti >> 2021 >> QX80 Premium Select, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTCS) (3 Of 5) >> Engine (ECM) >> DTC P050B: Cold Start Control >> Confirmation Procedure
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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:

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

    GO TO 2.

  2. PERFORM DTC CONFIRMATION PROCEDURE-I 

    SYMBOL With CONSULT

    1. Turn ignition switch OFF and wait at least 10 seconds.
    2. Turn ignition switch ON.
    3. Select "DATA MONITOR" mode with CONSULT.
    4. Check the indication of "COOLAN TEMP/S".

    SYMBOL With GST

    Follow the procedure "With CONSULT" above.

    Is the value of "COOLAN TEMP/S" between 5 deg.C (41 deg.F) and 36 deg.C (97 deg.F)?

    YES

    GO TO 3.

    NO

    Warm up the engine until the value of "COOLAN TEMP/S" reaches 15 deg.C (59 deg.F) or more. Retry from step 1.

    NO

    Cool engine down to less than 36 deg.C (97 deg.F). Retry from step 1.

  3. PERFORM DTC CONFIRMATION PROCEDURE-II 

    SYMBOL With CONSULT

    1. Set the select lever in N range.
    2. Start the engine and warm up in idle with the value of "COOLAN TEMP/S" between 5 deg.C (41 deg.F) and 40 deg.C (104 deg.F) for more than 15 seconds.
    3. Check 1st trip DTC.

    SYMBOL With GST

    Follow the procedure "With CONSULT" above.

    Is 1st trip DTC detected?

    YES

    Refer to DTC Diagnosis Procedure .

    NO

    INSPECTION END