Rear Heater A/C Unit Replacement

REMOVAL

1. Disconnect and isolate the battery negative cable.
2. Disconnect the underbody plumbing at the rear heater-A/C unit plumbing connections. Install plugs in, or tape over all of the opened plumbing fittings.

Fig. 23 Rear Heater-A/C Unit Plumbing Plate Remove/Install:

3. Remove the three nuts that secure the rear heater-A/C unit plumbing plate studs to the underbody panel.

Fig. 24 Rear:

4. Remove the one screw that secures the rear heater-A/C unit to the underbody panel from underneath.
5. Lower the vehicle and remove the cover from the rear heater-A/C unit.
6. Remove the vertical duct from the rear heater- A/C unit.
7. Remove the horizontal duct from the rear heater-A/C unit.
8. Remove the screw that secures the rear heater- A/C unit ground wire eyelet to the left side panel strainer behind the unit.
9. Remove the two screws that secure the bottom of the rear heater-A/C unit to the underbody panel.
10. Lift the rear heater-A/C unit upwards far enough for the plumbing to clear the hole in the underbody panel, then pull the unit away from the side panel far enough to access and unplug the wire harness connector from the body wire harness near the front of the unit.
11. Remove the rear heater-A/C unit from the passenger compartment.

INSTALLATION

1. Position the rear heater-A/C unit in the passenger compartment. Be certain that the studs on the plumbing plate are inserted through the proper holes in the underbody panel.
2. Plug in the rear heater-A/C unit wire harness connector to the body wire harness.
3. Secure the rear heater-A/C unit to the underbody panel with two screws. Tighten the mounting screws to 1.9 Nm (17 in. lbs.).
4. Secure the rear heater-A/C unit ground wire eyelet to the left side panel strainer behind the unit. Tighten the mounting screw to 1.9 Nm (17 in. lbs.).
5. Reinstall the horizontal duct to the rear heater- A/C unit.
6. Reinstall the vertical duct to the rear heater- A/C unit.
7. Reinstall the cover to the rear heater-A/C unit.
8. Raise and support the vehicle.
9. From underneath the vehicle, reinstall the one screw that secures the rear heater-A/C unit to the underbody panel. Tighten the mounting screw to 1.9 Nm (17 in. lbs.).
10. Reinstall the three nuts that secure the rear heater-A/C unit plumbing plate to the underbody panel. Tighten the mounting nuts to 11.2 Nm (100 in. lbs.).
11. Remove the tape or plugs from all of the plumbing connections. Connect the underbody plumbing to the rear heater-A/C unit plumbing. See Underbody Plumbing in the Removal and Installation for the procedures.
12. Connect the battery negative cable.