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 | - Vacuum line(s)
- Hose(s)/hose joints
- Gasket(s)
- PCV valve
- PCV separator
- EGR valve
- EGR tube
| - Electrical connector(s)
- Wiring harness
- Fuse(s)
- Relay
- EGR valve
| - 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 is not visually evident, verify the symptom and refer to WDS to diagnose the system.
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