Toyota Yaris: Ignition System / System Diagram
SYSTEM DIAGRAM

ON-VEHICLE INSPECTION CAUTION / NOTICE / HINT CAUTION: To prevent injury due to contact with an operating V-ribbed belt or cooling fan, keep your hands and clothing away from the V-ribbed belt and cooling fan when working in the engine compartment with the engine running or the ignition switch on (IG)...
Other information:
C..
Road chemicals and salt used for ice and snow removal and solvents
used for dust control may collect on the underbody. If not removed,
they will speed up rusting and deterioration of such underbody parts
as fuel lines, frame, floor pan, and exhaust system, even though these
parts may be coated with anti-corrosive material...
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If a key is left in the vehicle, the functions of the key left in the vehicle
are temporarily suspended to prevent theft of the vehicle.
To restore the functions, press the unlock button on the functions-suspended
key in the vehicle.
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