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

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    Inspection procedure
    1 Inspect transmission wire(s2) Disconnect the transmission wire connector from the transaxle.  measure the resistance according to the value(s) in the table below. Standard: 2 Check harness and connector(transmission wire – ecm) Connect the transmission connec ...

    Circuit description
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    Screen for general settings
    1 Press the “SETUP” button. 2 Select “General” on the “Setup” screen. 1 “English”, “Français” or “Español” can be selected. 2 On/off can be selected to sound beeps. 3 Select to change the screen color. 4 Select to change the keyboard layout. 5 The animatio ...