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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    Using the radio (Multimedia system)
    Radio operation Select “AM” or “FM” on the audio source selection screen to begin listening to the radio. Audio control screen Pressing the “AUDIO” button displays the audio control screen from any screens of the selected source. 1 Audio source selection screen appears 2 Preset ...

    Checking the messages
    1 Display the “Message Inbox” screen. 2 Select the desired message from the list. 3 Check that the message is displayed. 1 E-mails: Select “Mark Unread” or “Mark Read” to mark mail unread or read on the message inbox screen. This function is available when “Update Message Read S ...

    How to proceed with troubleshooting
    1 Vehicle brought in 2 Customer problem analysis check and symptom check 3 Problem symptoms table Without applicable symptoms, proceed to ”a”  with applicable symptoms, proceed to ”b” 4 Perform troubleshooting in the following method, depending on malfunction symptom ...