Tools Required

J 39400-A Halogen Leak Detector

1. Remove the auxiliary HVAC module assembly. Refer to Auxiliary HVAC Module Replacement .



2. Remove the auxiliary TXV line clamp screws.
3. Remove the auxiliary TXV line clamp from the HVAC module assembly.



4. Remove the bolt from the auxiliary TXV line block fitting.
5. Disconnect the A/C lines from the auxiliary TXV.
6. Remove and discard the sealing washers.

Important: Cap or tape the open A/C lines immediately to prevent system contamination.

7. Cap or tape the A/C lines.



8. Remove the auxiliary TXV to auxiliary evaporator core bolts.
9. Remove the auxiliary TXV from the auxiliary evaporator core.
10. Remove and discard the sealing washers.



11. Remove the auxiliary temperature actuator screws.
12. Remove the auxiliary temperature actuator from the auxiliary HVAC module.



13. Remove the auxiliary blower motor housing screws.
14. Remove the auxiliary blower motor housing from the HVAC module.
15. Remove the auxiliary HVAC module case screws.
16. Separate the auxiliary HVAC module case halves.
17. Remove the auxiliary evaporator core from the lower HVAC module case.

1. If replacing the auxiliary evaporator core add the specified amount of PAG oil directly to the auxiliary evaporator core. Refer to Refrigerant System Capacities .
2. Install the auxiliary evaporator core into the lower HVAC module case.
3. Assemble the auxiliary HVAC module case halves.

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.

4. Install the auxiliary HVAC module case screws.

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




5. Install the auxiliary blower motor housing to the HVAC module.
6. Install the auxiliary blower motor housing screws.

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




7. Install the auxiliary temperature actuator to the auxiliary HVAC module.
8. Install the auxiliary temperature actuator screws.

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

9. Install new sealing washers to the auxiliary evaporator core. Refer to Sealing Washer Replacement .
10. Remove cap or tape from the A/C lines.



11. Install the auxiliary TXV to the auxiliary evaporator core.
12. Install the auxiliary TXV to the auxiliary evaporator core mounting bolts.

Tighten
Tighten the bolts to 3.5 N·m (31 lb in).

13. Install new sealing washers onto the auxiliary TXV line block fitting. Refer to Sealing Washer Replacement .



14. Connect the auxiliary TXV line block fitting to the auxiliary evaporator core.
15. Install the auxiliary TXV line block fitting retaining bolt.

Tighten
Tighten the bolt to 11 N·m (97 lb in).

16. Install the auxiliary TXV line clamp to the HVAC module assembly.



17. Install the auxiliary TXV line clamp screws.

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

18. Install the auxiliary HVAC module assembly. Refer to Auxiliary HVAC Module Replacement .
19. Leak test the fittings of the component using J 39400-A .