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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    Diagnostic trouble code chart
    The inspection procedures are shown in the table below. This table allows efficient and accurate troubleshooting using the diagnostic trouble codes displayed in the diagnostic trouble code chart. Proceed with troubleshooting in accordance with the inspection procedures listed in the diagnost ...

    Inspection procedure
    1 Check security indicator light Remove the security indicator.  check the indicator light, as shown in the illustration and table. Standard: 2 Check wire harness (tvip ecu  security indicator) Disconnect the tvip ecu and security indicator connectors.   ...

    Overhaul
    1. Remove bench type rear seat cushion assy Disengage the 2 clamps, and then remove the seat cushion. 2. Remove separate type rear seat back assy  lean the seat back forward.  remove the 2 clips.  remove the 2 bolts and seat back lh. employ the same manner describ ...