Testing & Repair Procedure: Notes

The 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 Trouble Codes Connect appropriate OBD-II scan tool. Retrieve codes and record any freeze-frame data. See RETRIEVING TROUBLE CODES .
• Clear Trouble Codes Clear codes using scan tool. See CLEARING TROUBLE CODES .
• Visual Inspection Inspect all connectors of suspect circuit or component. Ensure all connections are clean and tight.
• Confirm Symptoms & Trouble Codes Perform road test. Determine if original symptoms are still present. Retrieve codes. See RETRIEVING TROUBLE CODES 
• Diagnose & Repair Trouble Codes Perform diagnosis and repair procedures as needed. See applicable DIAGNOSTIC TESTING. If no codes are present, proceed to the TESTS W/O CODES article for diagnosis by symptom (i.e., ROUGH IDLE, NO START, etc.).
• Confirmation Procedure After repairs have been completed, clear all trouble codes. See CLEARING TROUBLE CODES . Perform road test. Confirm that no trouble codes are present and all symptoms and/or complaints have been repaired.