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 Diagnostic Trouble Codes (DTC) Connect appropriate scan tool. Retrieve DTCs. See RETRIEVING DIAGNOSTIC TROUBLE CODES (DTCs).
• Clear DTCs Clear DTCs. See CLEARING DTC.
• Visual Inspection Inspect all connectors of suspect circuit or component. Ensure all connections are clean and tight.
• Confirm Symptoms & DTCs Perform road test. Determine if original symptoms are still present. Retrieve DTCs.
• Diagnose & Repair DTCs Perform diagnosis and repair procedures as needed. See applicable SYSTEM CHECKS. If no codes are present, proceed to 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 DTCs. See CLEARING DTC. Perform road test. Confirm that no DTCs are present and all symptoms and/or complaints have been repaired.