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 ...

    Terminals of ecu
    1. Inspect integration relay Disconnect the connector from the integration relay. check the continuity between each terminal of the disconnected connector and the body ground, as shown in the illustration and table. Standard: If the result is not as specified, the vehicle’s ...

    Circuit description
    The actuator motor is operated by signals from the cruise control ecu assy. Acceleration and deceleration signals are transmitted by changes in the duty ratio (see below). Duty ratio: the duty ratio is the ratio of the period of continuity in one cycle. For example, if a is the period of co ...