Toyota car stereos are equipped with an anti-theft feature that requires a four-digit access code. The feature is activated whenever the head unit is disconnected from the power source. After repairs or replacement, you will need to reset the access security code before operation of the stereo is possible.
You can take the Toyota to an authorized Toyota dealership or service station to have the code reset, or you can do it yourself and save time.
Turn the Toyota’s ignition to the “On” position to provide power to the stereo.