Initial Inspection and Diagnostic Overview

Inspection and Verification
1. Verify the customer concern by running the engine or by road testing the vehicle.





Visual Inspection Chart

2. Visually inspect for obvious signs of mechanical or electrical damage.
3. Inspect the wiring and connectors of the H02S or catalyst monitor sensors for looseness corrosion or other damage.
4. If the concern is not visually evident, determine the symptom and proceed to the symptom chart. Symptom Related Diagnostic Procedures