Expansion Valve: Service and Repair

THERMAL EXPANSION VALVE REPLACEMENT - AUXILIARY

TOOLS REQUIRED
J 39400-A Halogen Leak Detector

REMOVAL PROCEDURE
1. Recover the refrigerant. Refer to Refrigerant Recovery and Recharging.
2. Remove the left lower quarter trim panel.
3. Remove the foam wrap from the auxiliary thermal expansion valve (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.
9. Cap or tape the A/C lines.

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




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.
4. Install the auxiliary TXV to the evaporator core mounting bolts.

NOTE: Refer to Fastener Notice in Service Precautions.

Tighten the bolts to 3.5 N.m (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 the nut to 11 N.m (97 lb in).




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

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

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