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Home >> Infiniti >> 2005 >> Q45 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Introduction >> Trouble Diagnosis For Intermittent Incident >> Diagnostic Procedure

Diagnostic Procedure

  1. INSPECTION START 

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

    1. GO TO 2.
  2. CHECK GROUND TERMINALS 

    Check ground terminals for corroding or loose connection. Refer to "GROUND INSPECTION ".

    OK or NG 

    1. OK: GO TO 3.
    2. 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 

    1. OK: GO TO 4.
    2. 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 

    1. OK: INSPECTION END 
    2. NG: Repair or replace connector.
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