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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    Replacement
    Hint: components: 1. Precaution 2. Disconnect battery negative terminal 3. Remove air bag front rh sensor Disconnect the connector from the airbag front rh sensor.  remove the 2 bolts and airbag front rh sensor. 4. Inspect air bag front rh sensor 5. Install air bag front rh ...

    Replacement
    1. Drain brake fluid Notice: wash the brake fluid off immediately if it comes into contact with any painted surface. 2. Remove air cleaner cap sub–assy 3. Remove air cleaner case sub–assy  remove the air cleaner element, then remove the 3 bolts and air cleaner case sub–assy. ...

    Installing the spare tire
    1 Remove any dirt or foreign matter from the wheel contact surface. If foreign matter is on the wheel contact surface, the wheel nuts may loosen while the vehicle is in motion, causing the tire to come off. 2 Install the tire and loosely tighten each wheel nut by hand by approximately the sa ...