Flow of Diagnosis

1. Perform EATC On-Board Diagnostic Test. Record all DTCs displayed during test.

2. If DTCs appear during EATC On-Board Diagnostic, follow diagnostic procedures outlined in Diagnostic Trouble Code Key for each DTC recorded.

3. If a condition exits but no DTCs appear during the test in Step 1, refer to EATC System Functional Test and to Diagnosis When On-Board Diagnostic Indicates No DTCs found.