I couldn't seem to find the video either, but below is a write up on repairing/diagnosing it. On that note I was mixing up my terminology, Frango is correct its called a mode or actuator door. They all use the same actuators and very similar door flaps, just different locations. Anyways read below and enjoy. I'll keep trying to find the video, it used to be on youtube a few years ago when I did mine.
The mode door is controlled by a small electricmotor called and actuator. the actuator is mounted on the HVAC case. It can fail or the small gear on the end can strip. Most common they fail. You can get to actuator, unbolt it, leave plugged and work controls to see if it moves. If not, you can replace OR a scanner is need to fully diagnose the problem or recalibrate,. Yours most likley does not need recalibrating but is bad.
WARNING: ON VEHICLES EQUIPPED WITH AIRBAGS, DISABLE THE AIRBAG SYSTEM BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. DISCONNECT AND ISOLATE THE NEGATIVE BATTERY (GROUND) CABLE, THEN WAIT TWO MINUTES FOR THE AIRBAG SYSTEM CAPACITOR TO DISCHARGE BEFORE PERFORMING FURTHER DIAGNOSIS OR SERVICE. THIS IS THE ONLY SURE WAY TO DISABLE THE AIRBAG SYSTEM. FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY OR DEATH.
The heater-A/C system is equipped with two mode door actuators. One for the air doors
for the outlets in the instrument panel and one for the air door for the rear seat/console outlets.
- Disconnect and isolate the negative battery cable.
- Remove the instrument panel silencer from the driver side of the instrument panel.
- Remove the three screws (1) that secure the mode door actuator (2) to the driver side of the HVAC air distribution housing (3).
- Remove the mode door actuator from the air distribution housing and disconnect the HVAC wire harness connector (4) from the actuator.
- Remove the mode door actuator from the vehicle.
- Position the mode door actuator (1) into the vehicle.
- Install the mode door actuator onto the driver side of the HVAC air distribution housing (2). If necessary, rotate the actuator slightly to align the splines on the actuator output shaft (3) with those on the mode door cam (4).
- Install the screws (1) that secure the mode door actuator (2) to the driver side of the air distribution housing (3). Tighten the screws to 2 N.m (17 in. lbs.).
- Connect the HVAC wire harness connector (4) to the mode door actuator.
- Install the instrument panel silencer onto the driver side of the instrument panel.
- Reconnect the negative battery cable.
This vehicle uses two mode door actuators (1) which are reversible, 12-volt
direct current (DC), servo motors. The mode door actuator for the panel/defrost/ demist/floor air doors
is located on the driver side end of the HVAC air distribution housing. The mode door actuator for the rear floor/console air door is located on the rear of the air distribution housing near the front of the floor console area. The mode door actuators are mechanically connected to the mode-air doors.
The mode door actuator is interchangeable with the actuators for the blend-air door(s) and the recirculation-air door
. Each actuator is contained within an identical black molded plastic housing with an integral wire connector receptacle (2). Each actuator also has an identical output shaft with splines (3) that connects it to its door linkage and three integral mounting tabs (4) that allow the actuator to be secured to the HVAC housing. The mode door actuator does not require mechanical indexing to the mode-air doors, as it is electronically calibrated by the A/C-heater control.
The two mode door actuators are connected to the A/C-heater control through the vehicle electrical system by dedicated two-wire leads and connectors of the HVAC wire harness. The mode door actuators can move the panel/ defrost/demist/floor air doors
in two directions. When the A/C-heater control pulls the voltage on one side of the motor connection high and the other connection low, the mode-air doors will move in one direction. When the A/C-heater control reverses the polarity of the voltage to the motor, the mode-air doors moves in the opposite direction.
When the A/C-heater control makes the voltage to both connections high or both connections low, the mode-air door
stops and will not move. The A/C-heater control uses a pulse-count positioning system to monitor the operation and relative position of the mode door actuators and the mode-air doors. The A/C-heater control learns the mode-air doors stop positions during the calibration procedure and will store a diagnostic trouble code (DTC) for any problems it detects in the mode door actuator circuits.
The mode door actuators cannot be adjusted or repaired and, if faulty or damaged, they must be replaced