| Diagnosis and Testing Inspection and Verification - Verify the customer concern.
- Visually inspect for obvious signs of mechanical or electrical damage.
Visual Inspection Chart | Mechanical | Electrical | - Spark plug wire(s)
- Spark plug(s)
- Ignition coil pack
| - Wiring harness
- Electrical connector(s)
| - 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 concern remains after visual inspection, use WDS to diagnose the system.
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