Testing & Repair Procedure

Following check list of procedures is suggested to be followed to ensure correct diagnosis and repair:

• Record Customer Complaint
  
  Ensure all customer complaints or observations are recorded. Test drive vehicle with customer when necessary for malfunction verification.
• Retrieve Diagnostic Trouble Codes (DTCs)
  
  Connect TECH 2 scan tool. Retrieve DTCs from ALL systems. See RETRIEVING DIAGNOSTIC TROUBLE CODES .
• Visual Inspection
  
  Inspect all connectors of suspect circuit or component. Ensure all connections are clean and tight.
• Confirm Symptoms & DTCs
  
  Determine whether customer's complaint corresponds with symptoms related to stored DTCs. If it does, DTC is probably set by primary fault and is not a secondary stored code.
• Diagnose & Repair DTCs
  
  Perform diagnosis and repair procedures as needed. See applicable DIAGNOSTIC TESTS . If no codes are present, proceed to TROUBLE SHOOTING - NO CODES article for diagnosis by symptom (i.e., rough idle, no start, etc.).
• Confirmation Procedure
  
  After repairs have been completed, clear all DTCs. See CLEARING DTCS . Perform road test. Confirm that no DTCs are present and all symptoms and/or complaints have been repaired.