Flow of Diagnosis

On-Board Diagnostics
- If a diagnostic trouble code is present, carry out the inspection required by the code indicated.

Diagnostic Trouble Codes

Basic Inspection
- Quickly decide the cause of the problem and check the part which might be the symptom.

Basic Inspection

Diagnostic Index
- Choose the item that most closely corresponds to the actual symptom.

Diagnostic Index

Quick Diagnosis Chart
- Estimate possible causes and verify which is effective for diagnosis in the mechanical system test.

Quick Diagnosis Chart

Symptom Troubleshooting
- Determine the cause of the trouble by using DIAGNOSIS BY SYMPTOM.

Symptom Troubleshooting