What EGR components are looked at during the VI?

• A. EGR computer.
• B. Vacuum lines only.
• C. EGR valve only.
• D. EGR valve, mounting, and associated vacuum lines or tubes for leaks or disconnections.

Answer: (D)

The key idea here is that a visual inspection of the EGR system looks for obvious physical faults across the entire assembly, not just one part. The EGR valve must be present and securely mounted, and all associated vacuum lines or tubes must be properly connected and free from leaks, cracks, or disconnections. If any part is missing or damaged among the valve, its mounting, or the vacuum lines, the EGR system won’t operate correctly, which you can see during a visual check. The EGR computer isn’t part of what you assess visually in this inspection, since electronics aren’t tested for function in the VI. That’s why the option covering the valve, its mounting, and the vacuum lines or tubes for leaks or disconnections is the most complete and correct choice.