| Diagnosis and Testing For mechanical concerns; refer to Section 303-00 Engine System - General Information. - Verify the customer concern.
- Visually inspect for obvious signs of mechanical or electrical damage.
- If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
- If the cause is not visually evident, verify the symptom and refer to the diagnostic tool to diagnose the system.
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