ENTRY AND START SYSTEM


  1. CONSTRUCTION


    1. Certification ECU (Smart Key ECU Assembly)


      1. The certification ECU (smart key ECU assembly) includes the IG1 relay and IG2 relay actuation circuits, CPU, and hold circuit.

      2. The hold circuit is provided to prevent the power supply to the relays from being cut off when an abnormality occurs in the IG1 relay and/or IG2 relay actuation circuits while driving.

        A01KE0HE06

        Tech Tips

        The certification ECU (smart key ECU assembly) constantly stores the present power source mode in its memory. Therefore, if the power to the certification ECU (smart key ECU assembly) is interrupted due to the removal of the battery, the certification ECU (smart key ECU assembly) restores the power source after the battery is reconnected.

        For this reason, if the battery is removed when the power source is in a mode other than off, the power will be restored to the vehicle at the same time the power is restored to the certification ECU (smart key ECU assembly) by reconnecting the battery. Therefore, before removing the battery, be sure to turn the power source off.