Housing Assembly HVAC: Service and Repair

HVAC MODULE ASSEMBLY REPLACEMENT

TOOLS REQUIRED
J 39400-A Halogen Leak Detector

REMOVAL PROCEDURE
1. Recover the refrigerant from the A/C system. Refer to Refrigerant Recovery and Recharging.
2. Drain the cooling system. Refer to Draining and Filling Cooling System in Cooling System.
3. Remove the heater pipe assembly.




4. Remove the evaporator drain tube (1) from the HVAC module.
5. Remove the instrument panel (I/P) assembly.




6. Remove the retainers from the upper defogger duct on the left side window.
7. Disconnect and remove the upper defogger outlet duct.




8. Disconnect the head-up display (HUD) electrical connector.
9. Remove the HUD retaining nuts.
10. Remove the screw that secures the HUD to the steering column bracket.




11. Remove the retainer from the lower defogger outlet duct.
12. Disconnect and remove the outlet duct from the defroster duct.




13. Remove the retaining screws from the floor air outlet duct.
14. Remove the outlet duct.




15. Remove the retainers from the upper outlet duct on the right side window defogger.
16. Disconnect and remove the defogger upper outlet duct from the defogger lower outlet duct.




17. Disconnect the defogger lower outlet duct from the knee bolster bracket.
18. Disconnect the defogger lower outlet duct from the defroster duct.
19. Remove the defogger lower outlet duct.
20. Remove the SIR bracket.




21. Remove the retaining screws from the floor air outlet duct.
22. Remove the air outlet duct.




23. Remove the defroster duct retaining screws.
24. Remove the defroster duct.
25. Disconnect the blower motor electrical connector.




26. Remove the blower motor retaining screws.
27. Remove the blower motor from the HVAC module.




28. Remove the retaining and sealing nuts from the cowl.
29. Remove the retaining bolts from the upper I/P cross vehicle beam.
30. Completely loosen the studs on the HVAC module.




31. Loosen the front LH recirculation housing retaining screw.

IMPORTANT:
- Reposition the HVAC module rearward to access the front left-hand (LH) screw.
- The front LH retaining tab of the recirculation housing is slotted.




32. Disconnect the recirculation actuator electrical connector.
33. Disconnect the HVAC module wiring harness from the recirculation housing.




34. Remove the remaining recirculation housing retaining screws.
35. Remove the recirculation housing from the HVAC module.




36. Carefully remove the HVAC module from the vehicle.




37. Remove and discard the air inlet, drain and plumbing seals from the HVAC module.

INSTALLATION PROCEDURE
1. If a new HVAC module is being installed, add the specified amount of PAG oil to the evaporator core. Refer to Refrigerant System Capacities.
2. Install the HVAC module studs.

NOTE: Refer to Fastener Notice in Service Precautions.

Tighten the studs to 4 N.m (35 lb in).




3. Install new air inlet, drain and plumbing seals to the HVAC module.
4. Inspect the dash-mat for proper alignment to the cowl. Align if necessary.

IMPORTANT:
- Ensure that the cut-outs on the dash-mat are properly aligned so that the drain and plumbing seals are seated directly against the cowl and the air inlet seal is seated directly against the dash-mat.
- The opening in the dash-mat for the HVAC module drain should be aligned so that the drain opening in the cowl is approximately centered in the dash-mat opening; allowing ample room for the module drain seal to fully seat against the cowl.




5. Install the HVAC module into the vehicle.

NOTE: Do not force the HVAC module between upper I/P and lower I/P cross vehicle beams. Damage to the HVAC module can result.

IMPORTANT: Spray a light coat of 3M(TM) P/N 08877 Silicone Lubricant Plus or equivalent onto the HVAC module heater cover to aid in the installation process.

6. Install the recirculation housing to the HVAC module.




7. Install the recirculation housing retaining screws.

Tighten the screws to 1.6 N.m (14 lb in).

8. Connect the HVAC module wiring harness to the recirculation housing.




9. Connect the recirculation actuator electrical connector.




10. Tighten the front LH recirculation housing retaining screw.

Tighten the screw to 1.6 N.m (14 lb in).




11. Align the following components to the corresponding openings on the cowl:
- The heater core block fitting
- The evaporator block fitting
- The HVAC module drain
- The HVAC module studs

IMPORTANT: If necessary, gently rotate the HVAC module forward to engage the HVAC module studs through the corresponding holes on the cowl.




12. Install the bolts retaining the HVAC module to the upper I/P cross vehicle beam.

Tighten the bolts to 5 N.m (44 lb in).

13. Install new HVAC module retaining and sealing nuts.

IMPORTANT: To prevent possible water leaks or wind/road noise from entering the vehicle passenger compartment, do not reuse the old HVAC module retaining and sealing nuts.

Tighten the nuts to 10 N.m (89 lb in).




14. Install the blower motor to the HVAC module.
15. Install the blower motor retaining screws.

Tighten the screws to 1.6 N.m (14 lb in).

16. Connect the blower motor electrical connector.




17. Install the defroster duct to the HVAC module.
18. Install the defroster duct retaining screws.

Tighten the screws to 10 N.m (89 lb in).

19. Install the right floor air outlet duct.




20. Install the floor air outlet duct retaining screws.

Tighten the screws to 1.6 N.m (14 lb in).

21. Install the lower outlet duct to the side window defogger.
22. Connect the lower outlet duct on the side window defogger to the defroster duct.
23. Remove the SIR bracket.




24. Connect the defogger lower outlet duct to the knee bolster bracket.
25. Connect the defogger upper outlet duct to the defogger lower outlet duct.




26. Install the retainers to the defogger upper outlet duct.
27. Install the left rear floor air outlet duct.




28. Install the floor air outlet duct retaining screws.

Tighten the screws to 1.6 N.m (14 lb in).

29. Connect the window defogger lower outlet duct to the defroster duct.




30. Install the defogger lower outlet duct retainer.
31. Install the screw that secures the HUD to the steering column bracket.

Tighten the screw to 3 N.m (27 lb in).

32. Install the HUD retaining nuts.

Tighten the nuts to 5 N.m (44 lb in).




33. Connect the HUD electrical connector.
34. Connect the defogger upper outlet duct.




35. Install the retainers to the upper defogger duct.
36. Install the I/P assembly.




37. Install the evaporator drain tube (1) to the HVAC module.

IMPORTANT: Ensure that the evaporator drain tube is fully seated to the HVAC module.

38. Install the heater pipe assembly.
39. Fill the cooling system. Refer to Draining and Filling Cooling System in Cooling System.
40. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging.
41. Leak test the fittings of the component using J 39400-A.