Section 521 (Automatic Transmission Shift Control System - Diagnosis): Precaution

WARNING: This page is about a different car, the 2004 Toyota Prius. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: When the negative (-) battery terminal is disconnected, initialize the Power Window Control System after the terminal is reconnected.

NOTE: NOTICES FOR HYBRID SYSTEM ACTIVATION:

When the warning lamp is illuminated or the battery has been disconnected and reconnected, pressing the power switch may not start the system on the first try. If so, press the power switch again.
With the power switch's power mode changed to ON (IG), disconnect the battery. If the key is not in the key slot during reconnection, DTC B2799 may be output.