The driver may select the following different modes of
operation:
When operating in AUTO mode, the heater and A/C programmer may operate
in several different modes:
The heater and A/C programmer may also access three purge modes when
certain conditions exist.
Off Setting
When the climate control system operates in the dual zone mode and you
press the OFF button once, the dual zone function will turn off. If you press
the OFF button twice, the whole climate control system will turn off. This
turns off the blower motor and the A/C compressor.
When the vehicle is moving, air flowing over the vehicle increases the
air pressure just ahead of the windshield. This forces air into the outside
air inlet, through the heater and A/C module assembly, and out through the
floor and windshield outlets.
The heater and A/C programmer operates the air mix valve. The heater
and A/C programmer attempts to match the inside and driver selected temperatures.
Since the compressor is not running, the system air may be warmed but not
cooled.
Auto Setting
The blower motor turns ON. The heater and A/C programmer automatically
controls the blower speed. The driver may override the automatic blower control
by pressing the fan speed switch.
The heater and A/C programmer evaluates the information supplied by
the following components:
| • | The heater and the A/C control |
The heater and A/C programmer determines whether one of the following
modes is required:
The heater and A/C programmer energizes the mode actuator to enter this
mode.
The information that is supplied to the heater and A/C programmer determines
whether the system will draw the outside air in, or recirculate the inside
air.
Floor/Windshield Setting
The A/C compressor activates if the outside temperature is above 3°C
(38°F). The A/C compressor runs in order to keep the evaporator core at
about 1°C (33°F), as long as you do not press the VENT button.
The heater and A/C programmer energizes the air mix actuators to:
| • | Open the defroster door |
| • | Position the air inlet door to the outside air position |
| • | Position the A/C door to direct air through the floor outlets |
The blower pulls the outside air into the system. The air is cooled
and dehumidified. The adjusted air is heated as necessary. Air is delivered
to the floor and windshield outlets.
Mid/Floor Setting
The A/C compressor activates if the outside temperature is above 3°C
(38°F). The A/C compressor operates in order to keep the evaporator core
at about 1°C (33°F), as long as you do not press the VENT button.
The heater and A/C programmer energizes the air mix actuators to:
| • | Close the defroster door |
| • | Position the air inlet door to the outside air position |
| • | Position the A/C door to direct air through the A/C vents and
the floor outlets |
The blower pulls the outside air into the system. The air is cooled
and dehumidified. The adjusted air is heated as necessary. Air is delivered
to the floor and instrument panel outlets.
The heater and A/C programmer energizes the air mix actuators to:
| • | Determine the proper air discharge temperature |
| • | Position the air mix valve accordingly |
Mid Setting
Access the MID mode by using the heater and A/C programmer when operating
in AUTO mode.
The A/C compressor activates if the outside temperature is above 3°C
(38°F). The A/C compressor operates in order to keep the evaporator core
at about 1°C (33°F), as long as you do not press the VENT button.
The heater and A/C programmer energizes the air mix actuators to:
| • | Close the defroster door |
| • | Position the air inlet door to the outside air position |
| • | Position the A/C door to direct air through the A/C vents |
The heater and A/C programmer energizes the air mix actuators to:
| • | Determine the proper air discharge temperature |
| • | Position the air mix valve accordingly |
Floor Setting
The heater and A/C programmer energizes the air mix actuators to:
| • | Close the defroster door |
| • | Position the air inlet door to the outside air position |
| • | Position the A/C door to direct air through the heater vents |
| • | Direct a small amount of air through the windshield outlets |
The heater and A/C programmer energizes the air mix actuators to:
| • | Determine the proper air discharge temperature |
| • | Position the air mix valve accordingly |
Front Defrost Setting
The blower motor turns ON. You may manually adjust the blower speed
using the fan switch. The A/C compressor activates if the outside temperature
is above 3°C (38°F).
The heater and A/C programmer energizes the air mix actuators to:
| • | Open the defroster door |
| • | Position the air inlet door to the outside air position |
| • | Position the A/C door to direct some of the air through the floor
outlets |
The heater and A/C programmer energizes the air mix actuators to:
| • | Determine the proper air discharge temperature |
| • | Position the air mix valve accordingly |
You cannot turn off the A/C compressor.
Recirc Setting
When you select the recirc mode, the programmer energizes the air inlet
actuator. The air inlet actuator positions the air inlet valve to the recirculate
position.
The recirc mode operates in the following modes:
Recirc is not allowed during the FRONT DEFROST mode. This may cause
windshield fogging.
The RECIRC function will operate for the entire ignition cycle. Pressing
the RECIRC button with the system OFF, will return the system to the last
setting (prior to the system being turned OFF).
Dual Zone Setting
Adjust the passenger control to select the dual zone mode. The heater
and A/C programmer energizes the driver and the passenger air mix valves independently.
The passenger may operate the passenger temperature control to request a warmer
or a cooler temperature on the passenger side of the vehicle. The heater and
A/C programmer energizes the passenger air mix valve actuator to increase
or decrease the passenger side discharge temperature, if the set temperature
is not the maximum hot or maximum cold setting.
