Parts for your 2014 Toyota Land cruiser-Tx valve

2014 Toyota Land Cruiser TX Valve — What It Does and When to Service It

Yes, a TX valve is fitted to the 2014 Toyota Land Cruiser (200 Series). Toyota’s Land Cruiser 200 Series Repair Manual (Air Conditioning section, 2013–2015 coverage) and the Toyota Electronic Parts Catalogue list a “cooler expansion valve” for the front evaporator, and on models with rear air, a second TX valve for the rear unit. DENSO technical training materials on Toyota A/C systems also describe the TX (thermostatic expansion) valve as the metering device used in these vehicles rather than an orifice tube.

The TX valve’s job is to precisely meter R‑134a into the evaporator based on outlet temperature and pressure, keeping the evaporator just above freezing while maximising cooling. It reacts to load changes fast—think towing up the Kaimais or crawling a hot worksite—so cabin temps stay stable without the evaporator icing up.

As part of routine servicing, the TX valve isn’t a scheduled replacement item. Instead, it’s assessed by system performance and contamination risk. If a compressor has failed, there’s metal and debris risk—then the valve should be replaced along with the receiver/drier or desiccant bag, and the system flushed where applicable. Land Cruisers with rear A/C have two evaporators and two TX valves, so a front–rear approach to diagnosis and repair is important.

• Common TX valve symptoms:
  • Poor cooling at idle but colder at speed
  • Evaporator or suction line frosting, then warm air
  • Hunting vent temps or a noticeable hiss at the dash
  • Uneven front vs rear A/C performance (on dual A/C models)

Replacement is a professional job: recover the refrigerant, remove the evaporator connection, replace the TX valve and O‑rings, evacuate, then precisely recharge with the correct R‑134a mass and ND‑OIL 8 (PAG) quantity as specified for the 200 Series. Always use new O‑rings lubricated with the correct oil, follow Toyota torque specs for the valve fasteners and line fittings, and carry out a nitrogen pressure test and vacuum integrity check before charging. On rear A/C models, note the rear TX valve is mounted at the rear evaporator in the quarter trim—access time needs to be allowed.

Good practice during A/C service on a 2014 Land Cruiser includes checking the cabin filter, condenser fin condition and fans, verifying blend/air mix door operation, and scanning for climate control faults. That way, the TX valve isn’t blamed for poor cooling caused by airflow or control issues.

FAQs

Does the 2014 Land Cruiser use a TX valve or an orifice tube?
It uses a thermostatic expansion valve. Front A/C models have one TX valve at the front evaporator, models with rear A/C have a second TX valve at the rear evaporator. This setup gives better control over evaporator temperature under varying load and ambient conditions.

What are the signs the TX valve is failing on a 200 Series?
Look for weak cooling at idle that improves with road speed, intermittent cold/warm swings, frosting at the evaporator or suction line, and uneven cooling between front and rear units. A restricted or stuck valve can mimic low charge, so proper pressure–temperature diagnostics are essential.

Can a TX valve be cleaned, or should it be replaced?
If there’s contamination from a compressor failure, replacement is the go—cleaning won’t reliably remove debris from the valve’s fine passages. When replacing, also renew the receiver/drier or desiccant and flush lines and condensers where appropriate to protect the new components.