The driver may select the following different modes of operation:

When operating in AUTO mode, the instrument panel module (IPM) may operate in several different modes:

If the heater and A/C control is not turned OFF, the IPM will also execute one of three purge modes at the start of each ignition cycle.

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 HVAC module, and out through the floor and windshield outlets.

The IPM controls the air mix valve. The IPM attempts to match the inside and driver selected temperatures. Since the compressor is not running, the system air may be warmed but not cooled.

The blower motor turns ON. The IPM automatically controls the blower speed. The driver may override the automatic blower control by pressing the fan speed switch.

The IPM evaluates the information supplied by the following components:

The IPM determines which one of the following modes is required:

The IPM energizes the mode actuator to command the program-determined mode.

The information that is supplied to the IPM determines whether the system will draw the outside air in, or recirculate the inside air.

The IPM energizes the mode actuator to:

Air is delivered to the floor and windshield outlets.

The IPM energizes the air inlet and mode actuators to:

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 IPM energizes the air mix actuators to:

Access the MID mode by using the IPM when operating in AUTO mode.

The IPM energizes the mode actuator to:

The IPM energizes the air mix actuators to:

The IPM energizes the mode actuator to:

The IPM energizes the air mix actuators to:

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 IPM energizes the air inlet and mode actuators to:

The IPM energizes the air mix actuators to:

You cannot turn off the A/C compressor or force Recirc in Defrost.

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).

Adjust the passenger control to select the dual zone mode. The IPM 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 IPM 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.