The power steering pump has two sections, one for the power steering. The other is for the fan. There is a solinoid valve located on the pump which controls the flow of pressurized oil to the fan motor. The electronic control unit is located inside the passenger compartment, near the glove box. It uses a temp sensor to determine when to open the solinoid, which causes the fan to spin at full speed.
good info guys. im new to lexus and they are more complicated. my previous cars were hondas and they are so easy to fix or to mess with. wat should i do to the electronic control? can you explain me please.