Titan 4WD V8-5.6L (VK56DE) (2006)
System Operation
The front air control determines defroster door position based on the position of the defroster switch. When the defroster switch is depressed, the
defroster door motor rotates directing air to the defroster ducts. When any mode other than defroster is selected, the defroster motor rotates in the
opposite direction closing off air flow to the defroster ducts.
In the AUTO mode, the front air control determines defroster door position based on the ambient temperature, the intake air temperature and the
in-vehicle temperature.
COMPONENT DESCRIPTION
Defroster door motor
The defroster door motor is attached to the front heater & cooling unit assembly. The front air control sends a voltage to rotate to the defroster door
directing the air flow either to the defroster ducts, or to the floor ducts, depending on which way the voltage and ground are applied to the motor leads.
Motor rotation is conveyed to a lever which activates the defroster door.