Before Starting

Before using this section, perform the Diagnostic System Check - Vehicle in Vehicle DTC Information and determined that the following items are OK:

• The control module, malfunction indicator lamp (MIL) and check engine are operating correctly.
• There are no DTCs stored.
• The 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. Inspect the items indicated under that symptom.