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Home >> Nissan-Datsun >> 2009 >> Quest Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Introduction >> Service Information >> Trouble Diagnosis For Intermittent Incident >> Diagnosis Procedure
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Diagnosis Procedure

  1. INSPECTION START

    Erase (1st trip) DTCs. Refer to , "EMISSION-RELATED DIAGNOSTIC INFORMATION ".

    GO TO 2.

  2. CHECK GROUND TERMINALS

    Check ground terminals for corroding or loose connection.

    Refer to , "GROUND INSPECTION "

    OK or NG 

    OK: GO TO 3.

    NG: Repair or replace.

  3. SEARCH FOR ELECTRICAL INCIDENT

    Perform HOW TO PERFORM EFFICIENT DIAGNOSIS FOR AN ELECTRICAL INCIDENT , INCIDENT SIMULATION TESTS .

    OK or NG 

    OK: GO TO 4.

    NG: Repair or replace.

  4. CHECK CONNECTOR TERMINALS

    Refer to HOW TO CHECK TERMINAL , HOW TO PROBE CONNECTORS , HOW TO CHECK ENLARGED CONTACT SPRING OF TERMINAL .

    OK or NG 

    OK: INSPECTION END 

    NG: Repair or replace connector.