Parts for your 2016 Toyota Land cruiser-Tx valve

2016 Toyota Land Cruiser TX valve (thermal expansion valve): what it does and how to look after it

Yes, the 2016 Toyota Land Cruiser (J200 series) uses a TX valve. This is confirmed by Toyota’s Repair Manual procedures titled “Cooler Expansion Valve (for Front)” and, on dual A/C models, “Cooler Expansion Valve (for Rear)”, as well as the Toyota Electronic Parts Catalogue listing a “Cooler Expansion Valve (TXV)” for this model. DENSO HVAC design references also describe the Land Cruiser’s system as a TXV‑type setup that controls refrigerant flow at the evaporator.

On the 2016 Land Cruiser, the TX valve meters refrigerant into the evaporator based on superheat, keeping cabin temps stable without freezing the core. Many AU/NZ-market 200 Series vehicles have dual A/C, so there’s a front TX valve at the HVAC case and, where fitted, a rear TX valve near the rear evaporator. Most 2016 vehicles in this region run R134a, but the correct refrigerant and oil spec are on the under‑bonnet label—always follow that.

The TX valve itself isn’t a scheduled service item, but it’s central to A/C performance. If the Land Cruiser’s air runs warm at idle, cycles hot and cold, ices the evaporator, or shows odd pressure readings, the TX valve could be sticking or restricted. A system that hisses, has poor cooling after compressor or condenser work, or shows metal debris in the lines also points to a TXV issue.

When replacement is needed, it’s a job for an ARCtick‑licensed (AU) or appropriately certified (NZ) technician, as the system must be recovered, evacuated and recharged to spec. Good practice on these vehicles includes:

• Replace the receiver–drier or desiccant bag whenever the system is opened.
• Fit new, correct‑size O‑rings lubricated with the specified PAG oil (e.g., ND‑OIL type per label).
• Torque the TX valve fittings to the service manual values to avoid leaks or distortion.
• Pressure test with nitrogen, then vacuum and charge by weight—don’t “top up” by guesswork.
• If equipped with rear A/C, assess both circuits, a restriction in either TX valve can mimic other faults.

For everyday care, keep the cabin air filter fresh and run the A/C regularly to circulate oil through the system. If cooling performance drops or the windscreen fogs oddly, get pressures and vent temps checked before summer—catching a lazy TX valve early can save a compressor later.

• Does the 2016 Land Cruiser have one or two TX valves?
  Most have a front TX valve, models with dual A/C also have a rear TX valve by the rear evaporator. If the vehicle has rear cabin climate controls and roof or rear quarter vents, it likely has the second valve.
• What are common signs a TX valve is failing on this model?
  Inconsistent cooling, warm air at idle, evaporator icing, short‑cycling, or abnormal high/low pressures. A restricted TXV may cause low suction pressure and poor cooling, while an overfeeding valve can ice the evaporator and reduce airflow.
• Should the receiver–drier be replaced when changing the TX valve?
  Yes. Any time the system is opened, replace the drier or desiccant, renew O‑rings, evacuate properly, and recharge by weight. This protects the new TX valve and the compressor.