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

1990 Toyota Supra Electrical Wiring Diagram
Using Toyota Electrical Wiring Diagram
2004 Nissan Murano Z50 Starting Charging System Service and Troubleshooting
2000 BMW Mini Cooper Spark Plug and Ignition Coil Wire Diagram
2009 Nissan Frontier Audio System Wiring Diagram