Circuit Description

With the smart key inside the luggage compartment, press the back door opener switch. The smart key ECU uses the back door oscillators (outer and inner) to output a request signal. The back door outer oscillator cannot verify an ID code in this situation. The smart key receives the request and transmits its ID code to the antenna. The ID code is then sent to the smart key ECU through the back door inner oscillator in order to be confirmed by the smart key ECU. If the ID code is verified, the smart key ECU sends a back door open signal to the instrument panel J/B (multiplex network body ECU) using the multiplex communication line and stops outputting request signals. The back door then can be opened.