Rear Climate Controls

WARNING: This page is about a different car, the 2018 Lincoln Continental. However, it is still accessible from the selected car via links, so may be relevant.

For diagnosis and testing of the rear climate control system, Refer to: Climate Control System .

The rear climate control system operation is determined by the settings on the front HVAC control panel selection or from the RHVAC control panel selection. The rear climate control components are hard wired to the FCIM. Air is cooled and dehumidified by the front (main) climate control system when operating in a mode that requires A/C compressor operation. The rear system requests are sent to the FCIM over the MS-CAN.

Rear Climate Controls - RHVAC Control Module

The customer interface from the rear climate control panel consists of the following selections:

Fan speed control: Adjust the volume of air circulated in the rear of the vehicle.
Heated seats: Press the button to switch the heated seats on to the desired level of heating. Three levels of heating can be selected by successive press of this button. A further button press would turn off the heating.
AUTO: Press the button to switch on automatic operation. Adjust to select the desired temperature. Fan speed and air distribution are automatically adjusted to heat or cool the vehicle to maintain the desired temperature.
Air distribution control: Press the button to turn airflow from the console or footwell vents on or off. You can distribute air through any combination of these vents.
Temperature control: Adjust the temperature of the air circulated in the rear of the vehicle.
Ventilated seats: Press to switch the ventilated seats on and off.
Power: Press to switch the rear system on and off.
Rear climate control lock indicator: When illuminated, you can only operate the rear passenger settings through the front controls.

For illustrations and rear climate control button operation information, refer to the Owner's Literature.

Rear Climate Controls - Front Touchscreen

The customer interface from the touchscreen has access to the rear climate control system. In the lower right of the main touchscreen, touch Climate. On the climate screen, touch Rear from the lower right corner. Rear climate control settings appear at the bottom of the screen:

Touch the power icon to turn the rear climate control functions off and on.
Touch Rear Lock Control to allow the rear seat passengers to adjust the rear climate settings. Touch it again to prevent the rear seat passengers from adjusting the settings. Rear Control automatically turns off when you use the touchscreen to adjust the rear climate settings.
Touch + or - to adjust the temperature.
To adjust fan speed, touch + or - next to the fan icon.
Touch Rear again to close the rear controls. Closing the rear climate control functions does not affect their current settings.

For illustrations and rear climate control button operation information, refer to the Owner's Literature.

Control System Logic

When a selection has been made on the rear climate control panel, known as the RHVAC control module, a message is sent to the FCIM over the MS-CAN.

Air Handling

The rear climate control system has the following features:

The rear blower motor recirculates the air inside the vehicle. Outside air is not available to the rear system.
The rear air inlet door, 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 from the front climate control housing.
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 console registers and the floor duct.
An air distribution duct supplies conditioned air to the rear passenger compartment to the passengers through adjustable registers.

The FCIM sends a PWM signal to the rear blower motor to control the blower speed. The rear blower motor provides variable ground feed for the blower motor.