Toyota Corolla (E120): Circuit description

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: there is a case that hand–held tester cannot be used when ecu is abnormal.

Wiring diagram

Inspection procedure

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    Inspection procedure
    1 Check p/t squib(lh) circuit(airbag sensor assy center – front seat outer belt assy lh) Disconnect the negative (–) terminal cable from the battery, and wait at least for 90 seconds.  disconnect the connectors between the airbag sensor assy center and the seat belt pretensio ...

    LDA (Lane Departure Alert)
    Basic functions The LDA system warns the driver if the vehicle may deviate from the current lane or course*, and also can slightly operate the steering wheel to help avoid deviation from the lane or course*. The front camera is used to detect lane lines or a course*. *: Boundary between the asphal ...

    Changing engine switch modes
    Modes can be changed by pressing the engine switch with brake pedal released. (The mode changes each time the switch is pressed.) OFF*1 The emergency flashers can be used. ACC*2 Some electrical components such as the audio system can be used. "ACCESSORY" will be displayed on the multi-info ...