Toyota Corolla (E120): Circuit description

When the ignition switch is turned on, battery positive voltage is applied to the coilwhich closes the contacts of the efi main relay (marked: efi) and supplies power to terminal +b of the ecm.

This signal causes current to flow to the coil, closing the contacts of the efi relay and supplying power to terminal +b of the ecm.

If the ignition switch is turned off, the ecm continues to switch on the efi relay for a maximum of 2 seconds for the initial setting of the isc valve.

Wiring diagram

Inspection procedure

    Share this page:

    Other materials:

    Air bag sensor front lh
    Components Replacement Hint: components: 1. Precaution 2. Disconnect battery negative terminal 3. Remove air bag sensor front lh Disconnect the connector from the airbag sensor front lh.  remove the 2 bolts and airbag sensor front lh. 4. Inspect air bag sensor front lh ...

    Circuit description
    Shifting from 1st to o/d is performed in combination with on and off of the shift solenoid valve s1 and s2 controlled by ecm. If an open or short circuit occurs in either of the solenoid valves, the ecm controls the remaining normal solenoid valve to allow the vehicle to be operated smoothly ...

    Hood
    Opening the hood 1. Pull the hood lock release lever. The hood will pop up slightly. 2. Pull the auxiliary catch lever to the left and lift the hood. 3. Hold the hood open by inserting the support rod into the slot. WARNING ■Pre-driving check Check that the hood is fully closed and locked. If ...