Circuit Description
WARNING: This page is about a different car, the 2005 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.
If there is a problem with the master cylinder solenoid power supply circuit, the skid control ECU outputs DTCs and prohibits operation under the fail safe function.
If the voltage supplied to the IG2 terminal is not within the DTC detection threshold due to malfunctions in such as the battery and alternator circuit, this DTC is stored.