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Home >> Infiniti >> 2015 >> QX50 Base, AWD >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (Diagnostic Trouble Codes (DTCS) P0447-P2128) >> DTC/Circuit Diagnosis >> DTC P050A, P050B, P050E: Cold Start Control >> DTC Description >> DTC Confirmation Procedure
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DTC Confirmation Procedure

  1. CHECK DTC PRIORITY

    If DTC P050A, P050B, or P050E is displayed with other DTC, first perform the confirmation procedure (trouble diagnosis) for other DTC.

    Is applicable DTC detected?

    YES 

    Perform diagnosis of applicable. Refer to DTC INDEX .

    NO 

    GO TO STEP 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 more than 11 V at idle. 

    GO TO STEP 3  .

  3. PERFORM DTC CONFIRMATION PROCEDURE-I

    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".

    With GST 

    Follow the procedure "With CONSULT" above.

    Is the value of "COOLAN TEMP/S" between 4°C (39°F) and 36°C (97°F)?

    YES 

    GO TO STEP 4  .

    NO-1 [If it is below 4°C (39°F)] 

    Warm up the engine until the value of "COOLAN TEMP/S" reaches 4°C (39°F) or more. Retry from step 1.

    NO-2 [If it is above 36°C (97°F)] 

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

  4. PERFORM DTC CONFIRMATION PROCEDURE-II

    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 - 10°C (14°F) and 40°C (104°F) for more than 15 seconds.
    3. Check 1st trip DTC.

    With GST 

    Follow the procedure "With CONSULT" above.

    Is 1st trip DTC detected?

    YES 

    Go to DIAGNOSIS PROCEDURE .

    NO 

    INSPECTION END