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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    Circuit description
    The purpose of this circuit is to prevent the engine from stalling while driving in lock–up condition, when brakes are suddenly applied. When the brake pedal is depressed, this switch sends a signals to the ecm. Then the ecm cancels the operation of the lock–up clutch while braking is i ...

    Malfunction in speedometer
    Wiring diagram Inspection procedure 1 Check combination meter assy Remove the combination meter assy with connector still connected.  check voltage.  Jack up either of the front wheels.  Shift the shift lever to neutral.  Turn the ignition switch to on ...

    Precaution
    1. Handling precautions on steering system  care must be taken when replacing parts. Incorrect replacement may affect the performance of the steering system and result in a driving hazard. 2. Handling precautions on srs airbag system  the vehicle is equipped with srs (suppl ...