Thermal Expansion Valve - Auxiliary

Auxiliary Air Conditioning Evaporator Thermal Expansion Valve Replacement

Tools Required
J 39400-A Halogen Leak Detector

Removal Procedure

1. Recover the refrigerant.
2. Remove the left lower quarter trim panel.
3. Remove the foam wrap from the auxiliary TXV.






4. Remove the auxiliary TXV line clamp screws.
5. Remove the auxiliary TXV line clamp from the HVAC module assembly.






6. Remove the bolt from the auxiliary TXV line block fitting.
7. Remove the A/C lines from the auxiliary TXV.
8. Remove and discard the sealing washers.

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

9. Cap or tape the A/C lines.






10. Remove the auxiliary TXV to evaporator core bolts.
11. Remove the auxiliary TXV from the evaporator core.
12. Cap or tape off the evaporator core lines.
13. Remove and discard the sealing washers.

Installation Procedure

1. Remove the cap or tape from the evaporator lines.
2. Install the new sealing washers onto the evaporator lines.






3. Install the auxiliary TXV to the evaporator core.

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 TXV to the evaporator core mounting bolts.

Tighten
Tighten the bolts to 3.5 Nm (31 lb in).

5. Remove the cap or tape from the A/C lines.
6. Install the new sealing washers onto the A/C line.
7. Install the A/C lines to the auxiliary TXV.






8. Install the auxiliary TXV line block fitting retaining bolt.

Tighten
Tighten the nut to 11 Nm (97 lb in).






9. Install the auxiliary TXV line clamp to the HVAC module assembly.
10. Install the auxiliary TXV line clamp screw.

Tighten
Tighten the screw to 1.6 Nm (14 lb in).

11. Install a new foam wrap to the auxiliary TXV.
12. Evacuate and recharge the A/C system.
13. Leak test the fittings of the component using J 39400-A.
14. Install the left lower quarter trim panel.