Parts for your 2022 Toyota Land cruiser-Tx valve

2022 Toyota LandCruiser TX Valve (Thermal Expansion Valve)

Based on Toyota service information (Toyota TIS Repair Manual for J300, Air Conditioning: Cooler Expansion Valve procedures) and the Toyota Electronic Parts Catalogue listing a “Cooler Expansion Valve” for the 2021–on LandCruiser 300 Series, this model does use a TX valve. DENSO HVAC technical literature also describes TXV-type metering used on late-model Toyota variable-displacement compressor systems. So a TX valve is relevant and fitted on the 2022 LandCruiser (front unit, and a rear unit on vehicles with rear A/C).

The TX valve on a 2022 Toyota LandCruiser 300 is the metering brain of the air-con. Sitting at the evaporator, it regulates how much liquid refrigerant enters, responding to outlet temperature and pressure so the evaporator runs at the sweet spot—cold enough to pull the heat out, but not so cold it ices up. On J300 models with rear A/C there’s a second valve at the rear evaporator doing the same gig for the back rows. With R-1234yf and a variable-displacement compressor onboard, the TX valve keeps superheat in check so the system stays efficient across Aussie summers and frosty alpine mornings.

It’s not a routine replacement item, but it deserves attention when A/C performance drops or whenever the system’s been opened. Tell-tales of a crook TX valve include weak or uneven cooling, evaporator outlet frosting, hunting vent temps, high-low side imbalances on the gauges, or metallic debris found after a compressor failure. If the compressor is replaced, best practice is to replace the TX valve(s) and the desiccant (receiver/drier bag integrated in the condenser on J300), flush where approved, then evacuate and recharge by weight.

When servicing the LandCruiser’s TX valve, use new O-rings lubricated with the correct oil for the vehicle’s compressor (R‑1234yf systems typically use PAG with DENSO ND‑Oil 12—confirm in the Toyota manual). Observe valve orientation and torque specs from Toyota TIS. Leak-test with dry nitrogen, pull a deep vacuum, and charge precisely by mass—don’t top up by guesswork. Because R‑1234yf is mildly flammable, work in a well‑ventilated area with the right equipment. If the vehicle has rear A/C, pressure-test and verify both circuits. Post-repair, clear any HVAC DTCs, run the A/C performance test, and confirm outlet temps and line frost patterns are normal. Get those basics right and the LandCruiser’s TX valve will keep cabin temps comfy from the Cape to the Catlins.

• Common symptoms: weak cooling, outlet frosting, hissing at the valve, erratic vent temps.
• Always replace O‑rings, renew desiccant, and charge by weight after opening the system.
• Check for contamination, a failed compressor means the TX valve can be clogged and should be replaced.

Popular questions about the 2022 Toyota LandCruiser TX valve

Where is the TX valve located on a 2022 LandCruiser 300?
The front TX valve is mounted at the evaporator within the HVAC case behind the dash, typically accessed from the passenger side when the glovebox/airbag area and cooler unit are removed. Models with rear A/C have a second valve at the rear evaporator, usually behind the side trim in the cargo area.

Do LandCruiser TX valves need regular replacement?
No. They’re service-on-condition parts. Replace if performance tests, gauge readings, or contamination point to a sticking or blocked valve, or whenever the compressor has failed and spread debris. Always pair the job with new O‑rings, desiccant, and a correct evacuate-and-recharge.

What refrigerant and oil are used, and do any settings need programming after TX valve replacement?
The 2022 LandCruiser 300 uses R‑1234yf refrigerant, compressor oil spec should be confirmed in Toyota TIS (commonly DENSO ND‑Oil 12). No coding is needed for the valve itself, but it’s good practice to clear HVAC fault codes and run the A/C performance and leak checks after service.