Toyota Corolla (E120): Circuit description

If the ignition switch is turned to the on position, battery positive voltage is applied to the switches, such as terminal ig of the ecu.

Wiring diagram

Inspection procedure

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    Inspection procedure
    1 Check side squib(lh) circuit(airbag sensor assy center – front seat airbag 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 front seat airbag assy ...

    On–vehicle inspection
    1. Inspect front axle hub bearing  remove the front wheel.  separate the front disc brake caliper assy .  remove the front disc.  inspect the bearing backlash. Using a dial indicator, check the backlash near the center of the axle hub. Maximum: 0.05 Mm (0. ...

    PCS (Pre-Collision System)
    The pre-collision system uses sensors to detect objects in the path of the vehicle. When the system determines that the possibility of a frontal collision with a detectable object is high, a warning operates to urge the driver to take evasive action and the potential brake pressure is increased to h ...