Important Preliminary Checks Before Starting

Before using the Symptom tables, use the following:

• Perform Diagnostic System Check - Engine Controls and verify all of the following items:
  • Clear the DTCs.
  • Ensure that the scan tool data is within normal operating range. Refer to Scan Tool Data List .
• Verify the customer's complaint.
• Perform the Visual and Physical Check in this section.

Locate the correct symptom in the list at the end of this section. Follow the procedures in the appropriate diagnostic table. If the condition can not be duplicated, or is determined to be intermittent, refer to Intermittent Conditions .