Toyota Corolla (E120): Circuit description

This is the power source of the ecu, hence the actuators.

Wiring diagram

Wiring diagram

Inspection procedure

    Share this page:

    Other materials:

    Lubrication system
    On–vehicle inspection 1. Check engine oil level  after warming up the engine and then 5 minutes after the engine stops, oil level should be between the ”l” and ”f” marks on the oil level gage. If low, check for leakage and add oil up to the ”f” mark. Notice: do not ...

    Shift solenoid ”a” performance (shift solenoid valve s1)
    Dtc p0751 shift solenoid ”a” performance (shift solenoid valve s1) 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 sc ...

    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 c ...