Toyota Corolla (E120): Emission control

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Monitor description
While the engine is being cranked, the battery positive voltage is applied to terminal sta of the ecm. If the ecm detects the starter control signal (sta) while the vehicle is driving, it will conclude that there is a fault in the starter control circuit. The ecm will turn on the mil and a d ...

Parking the vehicle
► Automatic transmission or continuously variable transmission􀁘 Automatic transmission or continuously variable transmission 1 With the shift lever in D, depress the brake pedal. 2 Shift the shift lever to P. 3 Set the parking brake. 4 Vehicles without a smart key system: Turn ...

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 ...