(2) - Inspect One Touch Power Window System (Using Ammeter W/Current-Measuring Probe)

WARNING: This page is about a different car, the 2002 Toyota Prius. However, it is still accessible from the selected car via links, so may be relevant.

Remove the driver door ECU with connectors connected.
Attach a current-measuring probe to terminal 5 of the wire harness.

Fig 1: Probing One Touch Power Window System
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Turn the ignition switch ON and set the power window switch in the down position.
As the window goes down, check that the current flow is approximately 7 A.

NOTE:

The PTC opens some 4-90 seconds after the window stops going down, so that check must be made before the PTC operates.

If operation is as specified, replace the driver door ECU.

Check that the current increases up to approximately 14.5 A or more when the window stops going down.