Before Starting

Before using this section, you should have performed the Diagnostic System Check-Engine Controls and determined that the following items are OK:

• The control module, malfunction indicator lamp (MIL), and check engine are operating correctly.
• There are no diagnostic trouble codes (DTCs) stored.
• Scan tool data is within normal operating range. Refer to Scan Tool Data List .

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