Diagnostic Strategy: Diagnostics

• Carry out on-board diagnostic procedures key on engine off (KOEO) and key on engine running (KOER).
• Record all diagnostic trouble codes (DTCs).
• Repair all non-transmission codes first.
• Repair all transmission codes second.
• Erase all continuous codes and attempt to repeat them.
• Repair all continuous codes.
• If only pass codes are obtained, proceed to DIAGNOSIS BY SYMPTOM .

Follow the Diagnostic Flow Chart sequence to diagnose and repair the concern the first time.