Toyota Corolla (E120): Circuit description

In the diagram below, when the engine is cranked, current flows from terminal st2 of the ignition switch to the starter relay coil and also current flows to terminal sta of the ecm (sta signal).

When the sta signal and ne signal are input to the ecm, tr is turned on, current flows to the coil of the circuit opening relay, the relay switches on, power is supplied to the fuel pump and the fuel pump operates.

While the ne signal is generated (engine running), the ecm keeps tr on (circuit opening relay on) and the fuel pump also keeps operating.

Wiring diagram

Wiring diagram

Inspection procedure

    Share this page:

    Other materials:

    Other functions
    ■ Switching between outside air and recirculated air modes Press . The mode switches between outside air mode (indicator off) and recirculated air mode (indicator on) each time is pressed. ■ Defogging the windshield Defoggers are used to defog the windshield and front side windows ...

    Floor shift cable transmission control select
    Replacement Hint: components: 1. Remove air conditioner unit assy Hint: refer to the instructions for removal of the air conditioner unit assy. 2. Separate air bag sensor assy center  remove the 3 bolts, separate the airbag sensor assy center. 3. Remove exhaust pipe assy 4. Remo ...

    Using the AUX port
    To use the AUX port, connect a portable player, press the “AUDIO” button, then select “AUX” to display the audio control screen. Connecting a portable audio player ■Operating portable audio players connected to the multimedia system The volume can be adjusted using the vehicle' ...