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:
PRECAUTION INITIALIZATION NOTICE:
Before replacing the ECM, refer to Service Bulletin (for Immobiliser System).
When the ECM is replaced, update the ECU security key.
Click here
WHEN USING GTS CAUTION: Observe the following items for safety reasons:
Before using the GTS, read the instruction manual...
FAIL-SAFE CHART If a problem occurs in the power steering system, the power steering assist will be stopped or the amount of power assist will be decreased to protect the system. Power Steering System Malfunction Fail-safe Operation EPS warning light Buzzer
Torque sensor (electric power steering column sub-assembly) malfunction
Power steering motor (power steering ECU assembly) malfunction
Power steering ECU assembly malfunction
Power steering assist stops or assist amount is limited Red or yellow Sounds intermittently or once
Vehicle speed signal malfunction
Skid control ECU (brake actuator assembly) malfunction
Decrease in battery voltage (not malfunction)
Power steering assist is temporarily limited Yellow Sounds once HINT:
If the power steering assist stops, the EPS warning light comes on (red)...
Categories
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.
read more