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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    Overhaul
    1. Remove generator pulley Sst 09820–63010 (09820–06010, 09820–06020) Hint: Hold sst 1 – a with a torque wrench, and tighten sst 1 – b clockwise to the specified torque. Torque: 39 nvm (398 Kgf·cm, 29 ft·lbf) Notice: check that sst is secured to the rotor shaft. ...

    Terminals of ecu
    1. Inspect integration relay Disconnect the connector and check the continuity of each terminal of the disconnected connector. Standard : If the result is not as specified, the vehicle’s side may malfunction. Reconnect the connector and check each terminal. Standard: If ...

    On–vehicle inspection
    Notice: ”cold” and ”hot” in these sentences express the temperature of the coils themselves. ”Cold” is from –10 c (14 f) to 50 c (122 f) and ”hot” is from 50 c (122 f) to 100 c (212 f). 1. Inspect ignition coil (with igniter) and spark test  confirm dtc. Notice: ...