Air Handling

The rear climate control system has the following features:

• The driver has primary control of the rear climate control system or can transfer control to the rear passenger control panel.
• The rear blower motor recirculates the air inside the vehicle. Outside air is not available to the rear system.
• The rear temperature door and the rear air distribution door are controlled by electric actuator motors.
• Movement of the rear temperature control between cool and warm causes a corresponding movement of the rear temperature door to mix air flowing through and around the rear heater core.
• Movement of the rear mode control between PANEL and FLOOR causes a corresponding movement of the rear air distribution door to direct airflow between the panel (headliner) registers and the floor duct.
• A vertical air distribution duct supplies air to the integral headliner air distribution duct. Airflow is then directed to the passengers through adjustable registers. The heater floor duct supplies air to a fixed register, which is integral to the side trim panel.

The HVAC control module sends a PWM signal to the rear blower motor speed control to control the blower speed. The rear blower motor speed control provides variable ground feed for the blower motor. A delay function provides a gradual increase or decrease in blower motor speed under all conditions.