Heating And Air Conditioning - Description
DESCRIPTION
Four different heating-A/C systems are available on this model.
- Manual Temperature Control (MTC) Dual Zone
- Manual Temperature Control (MTC) Tri Zone
- Automatic Temperature Control (ATC) Dual Zone
- Automatic Temperature Control (ATC) Tri Zone
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. See Cooling for more information before attempting any service to the engine cooling system.
FRONT HEATING AND A/C SYSTEM
All vehicles are equipped with a common HVAC housing (1). The heating-A/C system combines A/C, heating, and ventilating capabilities in a single unit mounted within the passenger compartment, beneath the instrument panel. The HVAC housing includes:
- Mode door actuator (2) and air-doors
- Recirculation door actuator (3) and air-door
- Particulate air filter (4), when equipped
- Blower motor (5)
- Blower motor power module (6)
- Passenger side blend door actuator (7) and air-door
- Evaporator temperature sensor (8)
- Heater core (9)
- A/C evaporator (10)
- Driver side blend door actuator (11) and air-door
Based upon the system and selected mode, conditioned air can exit the HVAC housing through one or a combination of the four main housing outlets: defrost, panel, floor and console. The defrost and panel outlets are located on the top of the HVAC housing, the floor outlets are located at each side of the HVAC housing, and the console outlet is located at the bottom rear 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 Outlets - Two large defroster outlets are located near 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 the bottom of each A-pillar.
- Panel Outlets - There are four panel outlets in the instrument panel. One located near each outboard end of the instrument panel facing the rear of the vehicle and one located on each side of the instrument panel center bezel.
- Floor Outlets - There are four floor panel outlets. One outlet located above each side of the floor panel center tunnel near the dash panel and one outlet located under the rear of each front seat.
- Console Outlets - There are four console outlets located at the rear of the center floor console. Two facing the rear of the vehicle and one on each side of the console, directing conditioned air under each front seat.
REAR HEATING AND A/C SYSTEM
The available rear heating-A/C system is equipped with a housing (1) that combines A/C and heating capabilities into a single unit that is mounted in the rear passenger compartment, behind the right quarter trim panel. The rear heater-A/C housing includes:
- Blower motor (2)
- Blower motor power module (3)
- Wire harness (4)
- A/C evaporator (5)
- A/C expansion valve (6)
- Heater core (7)
- Blend door and actuator (8)
- Mode door and actuator (9)
Based upon the rear temperature selected, conditioned air can exit the rear heater-A/C housing through one or a combination of the two outlets at the top of the housing. Once the conditioned air exits the rear heater-A/C housing, it is further directed through molded plastic ducts to the air outlets located in the rear of the passenger compartment. These air outlets and their locations are as follows:
- Upper Air Outlets - There are four air outlets with adjustable vanes located in the headliner.
- Lower (floor) Air Outlet - There is one air outlet with fixed vanes located in the right quarter trim panel.