Air Temperature Actuator

The console junction block provides power to the left air temperature actuator through the ignition 3 voltage circuit and splice pack. Power and ground are provided to the HVAC control module by the ignition 3 voltage and ground circuits.

When a desired temperature setting is selected, a variable resistor is used to determine the mode door position signals value. The resistor changes the 12-volt signal coming into the actuator and varies the voltage to move the actuator into the proper position, based on the signal from the HVAC control module. The motor opens the left air temperature actuator to a position to divert sufficient air past the heater core to achieve the desired vehicle temperature. Ground is provided to the left air temperature actuator by the ground circuit.