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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    Circuit description
    When driving uphill under cruise control, in order to reduce the number of shifting due to on–off overdrive operation and to provide smooth driving, when down shifting in the electronically controlled transmission occurs, a signal to prevent upshift until the end of the uphill slope is sent ...

    On–vehicle inspection
    1. Check fuel pump operation Connect the hand–held tester to the dlc3.  turn the ignition switch on and hand–held tester main switch on. Notice: do not start the engine.  select the active test mode on the hand–held tester.  please refer to the hand–held te ...

    Tire rotation
    Rotate the tires in the order shown. Front To equalize tire wear and extend tire life, Toyota recommends that tire rotation is carried out at the same interval as tire inspection. Vehicles with a tire pressure warning system: Do not fail to initialize the tire pressure warning system after tire ...