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.
The thermistor circuit inside the seat climate controller or the thermistor circuit of the rear seat heater may become open or short circuit, or the thermistor's output values may not change because it is damaged. If these situations occur, output from the Peltier element, fan motor, rear seat heater, idle-up signal (not including the front passenger side) will be stopped and the indicator illuminates according to blinking pattern 4.