HVAC - Airflow Distribution - Rear: Overview Dodge Durango II

Scheme 399

1. Remove the right interior quarter panel trim (Refer to «PANEL-QUARTER TRIM»(/dodge/durango/ii-2003-2006/remont/exteriorinterior-trim/#interior) ).
2. Remove the push-pin fasteners (1) that secure the rear ceiling distribution duct (2) and the rear floor distribution duct (3) to the right interior quarter panel (4).
3. Disconnect the rear ceiling distribution duct from the rear HVAC housing (5) by sliding the lower half of the ceiling distribution duct into the upper half of the ceiling distribution duct.
4. Disconnect the rear ceiling distribution duct from the headliner duct and remove the ceiling distribution duct from the vehicle.
5. Disconnect the rear floor distribution duct from the rear HVAC housing and remove the floor distribution duct from the vehicle.

Scheme 400

1. Connect the rear floor distribution duct (3) to the rear HVAC housing (5).
2. Connect the rear ceiling distribution duct (2) to the headliner duct and the rear HVAC housing. Make sure that the rear ceiling distribution duct is fully installed to ensure a good seal.
3. Install the push-pin fasteners (1) that secure the rear ceiling distribution duct and the rear floor distribution duct to the right interior quarter panel (4).
4. Install the right interior quarter panel trim (Refer to «PANEL-QUARTER TRIM»(/dodge/durango/ii-2003-2006/remont/exteriorinterior-trim/#interior) ).

Scheme 401

Models equipped with the rear heating-A/C system are equipped with a common rear heater and A/C housing (7) that combines A/C and heating capabilities into a single unit mounted within the passenger compartment. The rear heating-A/C system is a blend-air type system. A blend-air door (6) controls the amount of conditioned air that is allowed to flow through, or around, the heater core (3). The rear A/C system is designed for the use of a non-CFC, R-134a refrigerant and uses an A/C evaporator (2) to cool and dehumidify the incoming air prior to blending it with the heated air. A temperature control determines the discharge air temperature by operating the blend door actuator (5), which moves the blend-air door. This allows an almost immediate control of the output air temperature of the system. The mode door actuator (8) operates the mode-air door (9) which directs the flow of the conditioned air out the upper or lower air outlets, depending on the discharge air temperature selected. Both electric actuators are connected to the vehicle electrical system by the HVAC wire harness (10). The rear blower motor (11) controls the velocity of air flowing through the rear HVAC housing by spinning the blower wheel within the rear blower motor housing (1) at the selected speed by use of the rear blower motor resistor block (4).

The rear HVAC housing must be removed from the vehicle and disassembled for service of the A/C evaporator, heater core, mode-air door, blend-air door and blower motor.

DESCRIPTION

The rear blower motor (1) and blower wheel (2) is located in the rear HVAC housing behind the right interior quarter panel trim and is connected to rear HVAC wire harness by a integral wire harness connector (3). The rear blower motor controls the velocity of air flowing through the rear HVAC housing by spinning the wide squirrel cage-type blower wheel within the HVAC housing at the selected speed. Rear blower motor speed is controlled by regulating the ground path through the rear blower motor switch and the rear blower motor resistor block.

Scheme 402

OPERATION

The rear blower motor will only operate when the ignition switch is in the On position and the front A/C-heater control is set to either front control of rear heating-A/C system or to the rear control of the rear heating-A/C system. The rear blower motor receives a battery feed through the rear blower motor relay located in the power distribution center (PDC), whenever the ignition switch is in the On position.

The rear blower motor, blower wheel, and blower wheel housing cannot be repaired and, if faulty or damaged, they must be replaced as an assembly.

For diagnosis and testing of the rear blower motor,. refer to DIAGNOSIS AND TESTING .

Scheme 403

1. Disconnect and isolate the negative battery cable.
2. Remove the rear HVAC housing (Refer to «REMOVAL»(ref-212854-S32115474342005122700000) ).
3. Disconnect the rear HVAC wire harness connector (1) from the rear blower motor (2).
4. Remove the three screws (3) that secure the rear blower motor to the rear air inlet housing (4).
5. Remove the rear blower motor from the rear air inlet housing.

Scheme 404

1. Position the rear blower motor (2) into the rear air inlet housing (4).
2. Install the three screws (3) that secure the rear blower motor to the rear air inlet housing. Tighten the screws to 2.2 N.m (20 in. lbs.).
3. Connect the rear HVAC wire harness connector (1) to the rear blower motor.
4. Install the rear HVAC housing (Refer to «INSTALLATION»(ref-212854-S08022352652005122700000) ).
5. Reconnect the negative battery cable.

There are four rear ceiling air outlets (1) located in the headliner (2). One air outlet is located at each outboard side of the intermediate seat position facing the center of the vehicle, and one located in front of each rear seat position facing the rear of the vehicle. Each of the rear ceiling air outlets contain a grille with movable vanes (3) that are used to direct or shut off the flow of the conditioned air leaving the rear ceiling air outlets. The rear ceiling air outlets and grilles can each be serviced seperately.

Scheme 405

There is one rear floor air outlet (1) located behind the right rear door area in the right quarter interior trim panel (2). The airflow from the rear floor air outlet is directed by fixed vanes in the right quarter interior trim panel and cannot be adjusted. The rear floor air outlet is not serviceable.

Scheme 406

Scheme 407

1. Using a trim stick or another suitable wide flat-blade tool (1), gently pry between both bottom ends of the rear ceiling air outlet bezel (2) and the headliner (3) to release the snap clip retainers that secure the air outlet bezel to the headliner.
2. Remove the rear ceiling air outlet(s) from the headliner.

Scheme 408

Scheme 409

1. Using a pick or another suitable tool (1), gently pry between the right end of the rear ceiling air outlet bezel (2) and the air outlet grille (3) to release the snap clip retainer that secures the grille to the pivot on the right side of the bezel.
2. Remove the rear ceiling air outlet grille (1) from the pivot on the left side of the air outlet bezel (2) by moving the grille out and to the right of the bezel.

Scheme 410

1. Position the rear ceiling air outlet(s) (1) into the headliner (2).
2. Gently push the air outlet bezel (3) into the headliner until the snap clips in the headliner duct fully engage the slots in the bezel

Scheme 411

Scheme 412

1. Install the rear ceiling air outlet grille (1) onto the pivot shaft (2) on the left side of the air outlet bezel (3).
2. Gently push the air outlet grille (1) onto the pivot shaft (2) on the right side of the air outlet bezel (3).

See also:
• PANEL-QUARTER TRIM