Tools Required

J 39400-A Halogen Leak Detector

1. Remove the HVAC module. Refer to HVAC Module Assembly Replacement .
2. Remove and discard the HVAC module assembly foam seal.



3. Remove the thermal expansion valve (TXV) mounting bolts.
4. Remove the TXV from the evaporator core.
5. Remove and discard the sealing washers.



6. Disconnect the discharge temperature management (DTM) sensor electrical connectors.
7. Disconnect the HVAC module wiring harness retainer pin (2) from the HVAC module.
8. Disconnect the wiring harness from the heater core cover wire harness retainer (1) and reposition the wiring harness aside.
9. Disconnect the wiring harness from the heater core cover wire harness retainer (3) and reposition the wiring harness aside.



10. Remove the heater cover screws.
11. Remove the heater cover from the HVAC module.



12. Remove the heater core from the HVAC module.



13. Remove the HVAC module case retaining screws.



14. Separate the HVAC module upper case from the HVAC module lower case.



15. Remove the evaporator core from the HVAC module.

1. If replacing the evaporator core, add the specified amount of polyalkylene glycol (PAG) oil directly to the evaporator core. Refer to Refrigerant System Capacities .

Important: Line the evaporator core side seal up with the corners of the evaporator core.




2. Install a new side seal to the evaporator core.



3. Install a new upper seal to the evaporator core.

Important: Locate the seals at the outer corners of the evaporator core.




4. Install two new lower seals to the evaporator core.



5. Install the evaporator core to the HVAC module.



6. Install the HVAC module upper case to the HVAC module lower case.

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.




7. Install the HVAC module case retaining screws.

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




8. Install a new foam seal to the heater core.



9. Install the heater core to the HVAC module.
10. Install the heater cover to the HVAC module.



11. Install the heater cover screws.

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




12. Reposition the HVAC wiring harness and connect the wiring harness to the heater core cover wiring harness retainer (1).
13. Reposition the HVAC wiring harness and connect the wiring harness to the heater core cover wiring harness retainer (3).
14. Connect the HVAC module wiring harness retainer pin (2) to the HVAC module.
15. Connect the discharge temperature management (DTM) sensor electrical connectors.



16. Install new sealing washers to the evaporator core. Refer to Sealing Washer Replacement .
17. Install the TXV to the evaporator core.
18. Install the TXV to mounting bolts.

Tighten
Tighten the bolts to 7 N·m (62 lb in).

19. Install the HVAC module. Refer to HVAC Module Assembly Replacement .