Toyota Corolla (E120): Circuit description

The door unlock detection switch is built in the door lock motor assembly. This switch is on when the door lock knob is in the unlock position and off when the knob is in the lock position. The ecu detects the door lock knob conditions in this circuit.

Wiring diagram

Inspection procedure

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    Replacement
    Hint: components: 1. Precaution 2. Disconnect battery negative terminal 3. Remove instrument panel sub–assy lower Remove the screw from the glove compartment door stopper sub–assy.  pull the instrument panel sub–assy lower to remove it. 4. Separate passenger airbag co ...

    Inspection procedure
    1 Check source voltage Measure the voltage of the battery. Ok: voltage: 10 – 14 v 2 Check air bag sensor assy center Disconnect the negative (–) terminal cable from the battery, and wait at least for 90 seconds.  disconnect the connectors from the airbag sensor assy ...

    System description
    The ecm uses the signals from the throttle position sensor, air–flow meter and crankshaft position sensor to monitor the engagement condition of the lock–up clutch. Then the ecm compares the engagement condition of the lock–up clutch with the lock–up schedule in the ecm memory to de ...