Toyota Corolla (E120): Circuit description

Hint:

Hint

: there is a case that hand–held tester cannot be used when ecu is abnormal.

Wiring diagram

Inspection procedure

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    System description
    The ecm uses signals from the vehicle speed sensor and crankshaft position sensor to detect the actual gear position (1st, 2nd, 3rd or o/d gear). Then the ecm compares the actual gear with the shift schedule in the ecm memory to detect the mechanical trouble of the shift solenoid valves, th ...

    Horn
    To sound the horn, press on or close to the mark. CAUTION ■Caution while driving Do not adjust the steering wheel while driving. Doing so may cause the driver to mishandle the vehicle and cause an accident, resulting in death or serious injury. ■After adjusting the steering wh ...

    Heated steering wheel/seat heaters
    Heated steering wheel Warms up the grip of the steering wheel Seat heaters Warm up the seat upholstery WARNING To prevent minor burn injuries Care should be taken if anyone in the following categories comes in contact with the steering wheel or seats when the heater is on: Babies, small chil ...