Grand Cherokee 2WD V8-5.2L VIN Y (1998)
Air Door Actuator / Motor: Service and Repair
REMOVAL
WARNING: ON VEHICLES EQUIPPED WITH AIR-BAGS, REFER TO AIRBAGS SYSTEMS BEFORE ATTEMPTING ANY STEERING
WHEEL, STEERING COLUMN, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. FAILURE TO TAKE THE
PROPER PRECAUTIONS COULD RESULT IN ACCIDENTAL AIR-BAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY.
The mode door actuators for vehicles equipped with the standard equipment manual temperature control system are vacuum controlled. The optional
Automatic Temperature Control (ATC) system uses electric motors to actuate the mode doors. The temperature/blend-air door for all models is actuated
by an electric motor. The service procedures for both types of actuators are covered by the following procedures.
Heat/Defrost - Panel/Defrost Door Motor
This motor is used only on models equipped with the optional Automatic Temperature Control (ATC) system.
1. Disconnect and isolate the battery negative cable.
2. Remove the two bolts that secure the center instrument panel support bracket to the left side of the floor panel transmission tunnel.
3. Remove the two bolts that secure the center instrument panel support bracket to the instrument panel.
4. Remove the center instrument panel support bracket from the vehicle.
Heat/Defrost - Panel/Defrost Door Motor Remove/Install
5. Unplug the wire harness connector from the heat/defrost - panel/defrost door motor.
6. Remove the three screws that secure the heat / defrost - panel/defrost door motor to the bottom of the heater-A/C housing.
7. Remove the heat/defrost - panel/defrost door motor from the heater-A/C housing.
8. Reverse the removal procedures to install. Tighten the mounting screws to 2.2 N.m (20 in. lbs.).
Heat/Defrost Door Vacuum Actuator
This actuator is used only on models equipped with the standard manual temperature control system.
1. Remove the heater-A/C housing from the vehicle. See Heater-A/C Housing for the procedures.
2. Turn the heater-A/C housing upside down on a work bench.
Heat/Defrost Door Vacuum Actuator Remove/Install
3. Unplug the vacuum harness connector from the heat/defrost door vacuum actuator.
4. Disengage the heat/defrost door pivot connection from the heat/defrost door pivot pin.
5. Remove the screws that secure the heat/defrost door vacuum actuator to the heater-A/C housing.