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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    Inspection procedure
    1 Inspect ecm(+b voltage) Turn the ignition switch on.  measure the voltage between the terminals of the e4 and e6 ecm connectors. Standard: 2 Check harness and connector(ecm – body ground) Disconnect the e4 ecm connector. check the resistance between the wire ...

    Diagnosis system
    Description  when troubleshooting obd ii vehicles, the only difference from the usual troubleshooting procedure is that you need to connect an obd ii scan tool complying with sae j1987 or a hand–held tester to the vehicle, and read off various data output from the vehicle†...

    Windshield wiper switch assy
    Replacement 1. Remove steering column cover lwr Remove 3 screws and steering column cover lwr. 2. Remove windshield wiper switch assy Disconnect the connecter of the windshield wiper switch.  release the claw and pull out the windshield wiper switch assy as shown in the ...