Toyota Corolla (E120): Circuit description

The ignition switch provides circuit power and the ecm provides the circuit ground that illuminates the mil.

Mil operation is checked visually: it should be illuminated when the ignition is first turned on. If the mil is off all of the time or on all of the time, use the procedure below to troubleshoot it. The mil is used to indicate the ecm’s detection of a vehicle malfunction.

Follow this procedure using the hand–held tester or an obd ii scan tool to determine the cause of the problem and to check the mil.

Wiring diagram

Inspection procedure

    Share this page:

    Other materials:

    Replacing a flat tire
    1 Chock the tires. 2 For vehicles with steel wheels, remove the wheel ornament using the wrench. To protect the wheel ornament, place a rag between the wrench and the wheel ornament, as shown in the illustration. 3 Slightly loosen the wheel nuts (one turn). 4 Turn the tire jack portion ...

    Luggage compartment door garnish outside
    Replacement Hint: the installation procedures are the removal procedures in reverse order. However, only installation procedures requiring additional information are included. 1. Remove luggage compartment lock cylinder & key set  remove the 2 nuts and luggage compartment lock cyl ...

    Manual transaxle oil
    On–vehicle inspection 1. Inspect transaxle oil Stop the vehicle on the level place.  remove the transmission filler plug and gasket.  check that the oil surface is within 5 mm (0.20 In.) From the lowest position of the inner surface of the transmission filler plug openin ...