Diagnostic Flow Chart: 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 which reappear.
• If only pass codes are obtained, proceed to DIAGNOSIS BY SYMPTOM  for further information and diagnosis.

Follow the diagnostic sequence to diagnose and repair the concern the first time.