Toyota Corolla (E120): Circuit description

The key unlock warning switch comes on when the ignition key is inserted in the key cylinder and goes off when the ignition key is removed.

Wiring diagram

Inspection procedure

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    USB charging port (if equipped)
    The USB charging port are used to supply 3.0 A of electricity at 5 V to external devices. The USB charging port are for charging only. They are not designed for data transfer or other purposes. Depending on the external device, it may not charge properly. Refer to the manual included with the dev ...

    Menu list of the Bluetooth® audio/phone
    To enter a menu, press and navigate menus by using : *: Bluetooth is a registered trademark of Bluetooth SIG, Inc. ■Bluetooth® audio/phone system functions Depending on the Bluetooth® device, certain functions may not be available. ...

    Wireless remote control/electronic key battery
    Replace the battery with a new one if it is depleted. As the key may be damaged if the following procedure is not performed properly, it is recommended that key battery replacement be performed by your Toyota dealer. ■If the key battery is depleted The following symptoms may occur: The smart ke ...