2004 Toyota Prius Owners Manual - Page 206

(c) Erasing the entire HomeLinkR memory (all three programs) To erase all previously programmed codes at one time, press and hold down the 2 outside buttons for 20 seconds until the indicator light flashes. If you sell your vehicle, be sure to erase the programs stored in the HomeLinkR memory. CAUTION D When programming the HomeLinkR Universal Transceiver, you may be operating a garage door or other device. Make sure people and objects are out of the way of the garage door or other device to prevent potential harm or damage. This device complies with part 15 of the FCC Rules and with RSS−210 of the Industry Canada. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference that may be received, including interference that may cause undesired operation. WARNING: This transmitter has been tested and complies with FCC and Industry Canada DOC/MPAC rules. Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the device. D Do not use this HomeLinkR Universal Transceiver with any garage door opener that lacks the safety stop and reverse feature as required by federal safety standards. (This includes any garage door opener model manufactured before April 1, 1982.) A garage door opener which cannot detect an object (signaling the door to stop and reverse), does not meet current federal safety standards. Using a garage door opener without these features increases risk of serious injury or death. 194