Because there isn't a single easily accessible image that shows it universally across all 2001 Passports, your best bet is to:
1. Consult a repair manual: A Haynes or Chilton manual specific to your vehicle will have diagrams and instructions. This is the most reliable way to locate it.
2. Search online: Use a search engine like Google Images and search for "2001 Honda Passport 3.2L throttle body" or "2001 Honda Passport 3.2L IACV location." You may find images or videos showing its position.
3. Look closely at the throttle body: The throttle body is the large metal housing connected to the intake manifold. The IACV is a relatively small component bolted or screwed directly onto it.
Remember to disconnect the battery's negative terminal before working on any electrical components.