- Symptom Diagnosis

Before using the Symptom Tables, you should have performed the Powertrain OBD System Check and verify all of the following are true:
Testing and Inspection

^ The PCM and MIL (Service Engine Soon) are operating correctly.

^ There are no DTC(s) stored.

^ Scan data is within normal operating range, refer to Engine Scan Tool Data List. Scan Tool Testing and Procedures

^ Verify the customer complaint, and locate the correct symptom in the table of contents. Check the items indicated under that symptom.