Circuit Description
WARNING: This page is about a different car, the 2006 Toyota Tundra and 2005 Toyota Tundra. 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 (skid control ECU) power supply circuit, the skid control ECU outputs DTCs and prohibits operation under the fail safe function.
If the voltage supplied to terminal IG2 are not within the DTC detection threshold due to malfunctions in such as the battery and alternator circuit, this DTC is stored.