lexus es300 power transistor circuitThe 2003 Lexus ES300 air conditioning control assembly controls the blower speed by varying the voltage at terminal BLW which applies the base current to the power transistor. The air conditioning control assembly also monitors the power transistor collector voltage at terminal, VM to control blower air volume precisely. The following schematic shows the 2003 Lexus ES300 Power Transistor circuit and wiring diagram. The system composed of heater main relay, blower motor, extra-hi relay, lo resistor, A/C control assembly. (click image to enlarge)



Related Post

Jeep Cherokee Cruise Control System 1988
2007 Suzuki Grand Vitara Main Fuse Box Diagram and Table
2000 Chrysler Sebring Spark Plugs Cables and Coil Diagram
2002 Hyundai H-1 Engine Wiring Diagram and Harness
2014 Nissan Juke Steering Sunroof Wiring Diagram