Toyota Corolla (E120): Circuit description

This is the power source of the ecu, hence the actuators.

Wiring diagram

Wiring diagram

Inspection procedure

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    Circuit description
    The ecm compares the two waveforms of the heated oxygen sensors located before and after the catalyst to determine whether or not the catalyst performance has deteriorated. Air–fuel ratio feedback compensation keeps the waveform of the heated oxygen sensor in front of the catalyst alterna ...

    Center stop lamp assy
    Replacement 1. Remove package tray trim panel assy (w/o rear spoiler) 2. Remove center stop lamp assy (w/o rear spoiler) Remove the center stop light assy as shown in the illustlation. 3. Remove center stop lamp assy (w/ rear spoiler) Remove the 2 screws.  disconnect th ...

    Inspection procedure
    1 Check wire harness(dlc3 – airbag sensor assy center) Turn the ignition switch to the lock position.  disconnect the aribag sensor assy center connector.  measure the resistance according to the value(s) in the table below. Standard: 2 Check wire harness(cg of dl ...