ACTUATOR-MODE DOOR
DESCRIPTION
The heating-A/C system uses two vacuum operated mode door actuators (1) to control the movement of the mode-air doors within the HVAC housing.
When vacuum is supplied by the A/C-heater control to the vacuum connector (3) on one side of the defrost/floor actuator or the panel door actuator, the actuator rod is pulled into the actuator, which moves the mode door lever and mode-air door in one direction. When vacuum is supplied by the A/C-heater control to the other side of the actuator, the rod moves the mode-air door in the other direction.
The mode door actuators are retained to the HVAC housing by an integral mounting provision (2) and can be accessed for service from under the driver side of the instrument panel.
The mode door actuators cannot be adjusted or repaired must be replaced if found inoperative or damaged.
REMOVAL
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 battery negative (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 an accidental airbag deployment and possible personal injury or death.
1. Disconnect and isolate the negative battery cable.
2. Remove the knee blocker from the driver side of the instrument panel (refer to 23 - BODY/INSTRUMENT PANEL/BLOCKER-KNEE - REMOVAL).
3. Disconnect the vacuum harness connectors (1 and 3) from the panel door actuator (2) or the floor/defrost door actuator (4) located on the driver side of the HVAC housing (5) as required.
4. Insert a trim stick C-4755 or equivalent (2) into the latch hole of the HVAC housing actuator mount(s) (1). Gently pry the actuator latch (3) away from the HVAC housing mount while pulling firmly outward on the actuator and disconnect the actuator from the HVAC housing.
5. Rotate and tilt the actuator(s) as required to disengage the actuator link from the mode door lever and remove the actuator from the vehicle.
INSTALLATION
1. Install the panel door actuator (2) or the floor/defrost door actuator (4) as required, by engaging the hole in the end of the actuator link to the hooked pin on the end of the door lever located on the driver side of the HVAC housing (5).
2. Install the actuator(s) onto the actuator mount(s).
3. Connect the vacuum harness connectors (1 and 3) to the actuators as required.
4. Install the knee blocker (refer to 23 - BODY/INSTRUMENT PANEL/BLOCKER-KNEE - INSTALLATION).
5. Reconnect the negative battery cable.