Preliminary Checks

Preliminary Checks
Before starting you should have performed the Powertrain On-Board Diagnostic (OBD) System Check Component Tests and General Diagnostics and determined that the following items are OK:
- The PCM/VCM and MIL (Check Engine) are operating correctly.
- There are no DTC(s) stored.
- Scan tool data is within normal operating range, refer to Engine 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.