Foreword -- How to Proceed With Troubleshooting

FOREWORD
- When the customer reports a vehicle malfunction, check the malfunction indicator lamp (MIL) indication and DTC, then diagnose the malfunction according to the flowchart.
- If the DTC exists, diagnose the applicable DTC inspection.
- If the DTC does not exist and the MIL does not illuminate or flash, diagnose the applicable symptom troubleshooting.