The following exploded diagram shows Toyota Corolla E11 Typical Starter|Solenoid. (click image to enlarge). The Toyota Corolla E11 series’s starting system consists of the battery, the starter motor, the starter solenoid and the electrical circuit connecting the components. The solenoid is mounted directly on the starter motor. The solenoid/starter motor assembly is installed on the upper part of the engine, next to the transmission bellhousing.
When the ignition key is turned to the Start position, the starter solenoid is actuated through the starter control circuit. The starter solenoid then connects the battery to the starter. The battery supplies the electrical energy to the starter motor, which does the actual work of cranking the engine.