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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    Phone screen
    To display the screen shown below, press the switch on the steering wheel or the button. Several functions are available to operate on each screen that is displayed by selecting the 4 tabs. 1 Device name 2 Bluetooth® connection status ■ Telephone switch ■ Microphone υ ...

    Under hood
    General maintenance 1. General notes maintenance requirements vary depending on the country. Check the maintenance schedule in the owner’s manual supplement. Following the maintenance schedule is mandatory. Determine the appropriate time to service the vehicle using either miles driv ...

    Pre–check
    1. Diagnosis system Release the parking brake lever.  check the warning lights. When the ignition switch is turned on, check that the abs warning light and brake warning light goes on for 3 sec. Hint: when the parking brake is applied or the level of the brake fluid is low, the ...