Operation - Rear

OPERATION

The rear blower motor and wheels are used to control the velocity of air moving through the center floor console ducts by spinning the blower wheels within the housing at the selected or programmed speed (depending on application).

The rear blower motor will operate whenever the ignition switch is in the On position and the power for the A/C-heater control of the automatic temperature control (ATC) heating-A/C system is turned on. When the ATC A/C-heater control display reads REAR AUTO or when the rear blower motor is off, the switch located in the center console between the second row seats is not functional. When the A/C-heater control display reads REAR, only the rear seat occupants control the rear blower motor speed from the rear switch. When in the Rear mode, the rear occupants can set the rear switch to any blower motor speed including OFF or AUTO. While in the Auto position, the rear blower motor speed will be automatically controlled.

The rear blower motor speed is controlled by an electronic blower motor power module, which uses a pulse width modulated input from the ATC A/C-heater control and feedback signal from the rear blower motor to regulate the blower motor ground path. The rear blower motor receives battery current whenever the rear blower motor relay is energized Testing and Inspection.

The rear blower motor and blower wheels are factory balanced and cannot be adjusted or repaired and must be replaced as an assembly if found inoperative or damaged.