Description

HEATING AND AIR CONDITIONING SYSTEMS

A manual temperature control (MTC) front single zone type heating-A/C system, MTC front and rear heating-A/C system, single zone front automatic temperature control (ATC) and rear heating-A/C system and a front dual zone ATC and rear heating-A/C system is available on this vehicle.

To maintain the performance level of the heating, ventilation and air conditioning (HVAC) system, the engine cooling system must be properly maintained. The use of a bug screen is not recommended. Any obstructions in front of the radiator or A/C condenser will reduce the performance of the A/C and engine cooling systems.

The engine cooling system includes the radiator, thermostat, radiator hoses and the engine coolant pump.

FRONT HEATING AND A/C SYSTEM





All vehicles are equipped with a common front heater, ventilation and air conditioning (HVAC) housing (1). The front heating-A/C system combines A/C, heating, and ventilating capabilities in a single HVAC housing mounted within the passenger compartment under the instrument panel. The front HVAC housing includes:

- Recirculation-air door and actuator (2)
- Blower motor (3)
- Blower motor resistor (MTC) or blower motor power module (ATC) (4)
- Evaporator temperature sensor (5)
- Blend-air door and actuator (6) (single zone or dual zone driver side)
- Blend-air door and actuator (7) (dual zone passenger side)
- Mode-air doors and actuators (8)
- Heater core (9)
- A/C evaporator (10)

Based upon the mode selected, conditioned air can exit the front HVAC housing through one or a combination of the three main housing outlets: defrost, panel or floor. The defrost outlet is located on the top of the HVAC housing, the panel outlet is located on the top of the HVAC housing and the floor outlet is located on the bottom of the HVAC housing. Once the conditioned air exits the HVAC housing, it is further directed through molded plastic ducts to the outlets within the vehicle interior. These outlets and their locations are as follows:

- Defroster Outlet - A single large defroster outlet is located in the center of the instrument panel top cover, near the base of the windshield.
- Side Window Demister Outlets - There are two side window demister outlets, one is located at each outboard end of the instrument panel top cover, near the belt line at the A-pillars.
- Panel Outlets - There are six panel outlets in the instrument panel, one located near each outboard end of the instrument panel facing the rear of the vehicle and two located at each side of the instrument panel center bezel.
- Floor Outlets - There are four floor outlets, one located above each side of the floor panel center tunnel near the dash panel and one behind each front seat.

REAR HEATING AND A/C SYSTEM





The front manual temperature control (MTC) and rear heating-A/C system, and the single zone and dual zone front automatic temperature control (ATC) and rear heating-A/C systems are equipped with a common rear heater and A/C housing (1) that combines A/C and heating capabilities into a single unit mounted within the passenger compartment behind the right quarter interior trim panel. The rear HVAC housing includes:

- Blower motor (2)
- Blower motor resistor (3)
- A/C evaporator (4)
- A/C expansion valve (5)
- Heater core (6)
- Blend door and actuator (7)
- Mode door and actuator (8)

Based upon the rear temperature selected, conditioned air can exit the rear HVAC housing through one or a combination of the two rear HVAC housing outlets: ceiling or floor. The ceiling outlet is located at the top-front of the HVAC housing and the floor outlet is located at the front of the HVAC housing. Once the conditioned air exits the rear HVAC housing, it is further directed through molded plastic ducts to the outlets at the rear of the passenger compartment. These outlets and their locations are as follows:

- Ceiling Outlets - There are four ceiling outlets in the headliner. One located at each outboard side of the intermediate seat position and one located in front of each rear seat position.
- Floor Outlet - There is one floor outlet in the right quarter interior trim panel located behind the right rear door area.