Circuit Description
WARNING: This page is about a different car, the 2004 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.
As a result of an short circuit, the ECU may not be able to provide 5 V of power voltage to the seat climate controller thermistor circuit, climate control switches's volume control circuit or rear seat heater thermistor circuit. If this happens, all output will be stopped and the indicator illuminates according to blinking pattern 3.