Circuit Description

If the smart ignition function does not operate, insert the smart key into the key slot and check if the hybrid control system starts. If the hybrid control system starts (the transponder key ECU outputs a start permission to the hybrid control system and the hybrid control system starts), it can be assumed that only the smart ignition system is malfunctioning.

The smart key ECU uses the indoor electrical key oscillator to send a request signal to the smart key when: 1) the driver's door is opened and closed, or 2) the power switch is changed from ON (ACC) to OFF or OFF to ON. Then, the smart key transmits its ID code to the door control receiver. The ID code, which is then sent to the smart ECU, is verified by the smart ECU and the verification result is sent to the transponder key ECU. The transponder key ECU and the smart ECU communicate encryption codes to each other using the multiplex communication line. When the return code from the smart ECU matches the ID code in memory, the transponder key ECU sends a hybrid control system start permission signal to the hybrid control ECU. Pressing the power switch then starts the hybrid control system. Turning the power switch from ON (ACC) to OFF stops the hybrid control system.