Toyota in line fuse from alternator - 2001 Toyota Camry Solara

Yes, if the alternator fuse is blown, it can cause the alternator to appear as if it's not functioning properly when it's actually fine. The alternator fuse is a critical component of the charging system, as it protects the alternator and the rest of the electrical system from overloads and short circuits.
When the alternator fuse blows, it interrupts the flow of electrical current from the alternator to the battery and the rest of the vehicle's electrical system. As a result, the alternator cannot charge the battery or provide power to the vehicle's electrical components.
If you suspect a problem with your alternator but the alternator itself tests fine, it's a good idea to check the alternator fuse and the associated wiring. Replacing a blown fuse can often resolve charging issues and restore the proper functioning of the alternator and charging system.

https://fuse-box.info/toyota/toyota-sienna-xl20-2004-2010-fuses

No, unless there is a short circuit someplace else

Radio is off or it's on and won't play? There could be an line fuse in the power wire going to the radio. That would mean pulling the radio to check.

The alternator fuse is in the fuse box under the hood near the battery, the fuses are marked inside the cover.

CHECK . check for faulty terminal ends connected to alternator...

carefully disconnect the alternator completely, now reconnect the battery, now one by one reconnect the alternator carefully first the connector check is fuse is blown, now the big wire that charges the battery if the fuse blown when the alternator was disconnected, the problem is in the wires, an accident, a mice, a recent engine job.
The fuse blown when the terminals to alternator are connected the problem is the alternator.

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I think you need a new alternator. Also check every fuse in depth. Make sure all the connections are in place and secure.

have him check the wiring to the alternator and the alternator itself. the big boy that blew is for the alternator on the small pickups. also check the line going from the underhood fusebox to the positive battery terminal, they tend to break off.

it should be in the underhood fusebox on the right.