Parts for your 1996 Daihatsu Gran move-Tx valve

1996 Daihatsu Gran Move TX‑valve: purpose, fitment and servicing advice

Based on technical references, the 1996 Daihatsu Gran Move (also known as the Pyzar in some markets) is fitted with a thermostatic expansion valve (TX‑valve) as part of its factory R‑134a air‑conditioning system. The Daihatsu Workshop Manual for Heating & Air Conditioning identifies an expansion valve at the evaporator inlet, and the Daihatsu Electronic Parts Catalogue (EPC) parts diagram for the Gran Move/Pyzar lists an “Expansion Valve (Thermostatic)” within the evaporator assembly. Major aftermarket catalogues from DENSO and Nissens also list a direct‑fit TX‑valve for the 1996 model, which aligns with the common Japanese layout of a TXV plus receiver‑drier rather than an orifice‑tube/accumulator setup.

On this model, the TX‑valve meters refrigerant flow into the evaporator depending on temperature and pressure at the outlet (via a sensing bulb). By maintaining the right superheat, it prevents the evaporator from flooding with liquid refrigerant, keeps cabin temps stable, and helps protect the compressor. When the valve is sticking or mis‑metering, owners often notice weak cooling at idle, a system that chills then suddenly warms, frost on the evaporator or lines, or odd pressure readings during a gauge test.

As part of routine A/C servicing on a Gran Move, technicians will usually assess TX‑valve performance by checking high/low‑side pressures, vent temps, and evaporator behaviour. If the system has been open to air, contaminated, or a new compressor is being fitted, replacing the TX‑valve and the receiver‑drier together is smart practice. It minimises moisture and debris issues that can damage the new parts.

• Use new O‑rings lubricated with the correct PAG oil for R‑134a.
• Ensure the sensing bulb is correctly clamped and re‑insulated on the evaporator outlet.
• Nitrogen pressure‑test, then deep‑vacuum the system before charging by weight per the under‑bonnet label.
• Aim for clean, stable low‑side pressure without evaporator freeze‑up under normal load.

Because access is at the evaporator, labour can be a bit higher than a simple under‑bonnet component swap, so many workshops schedule TX‑valve replacement alongside other A/C work to save repeat labour. With a quality valve and proper evacuation and charge, owners can expect crisp, reliable cooling through the Aussie and Kiwi summers.

Popular questions about the 1996 Daihatsu Gran Move TX‑valve

Where is the TX‑valve located on a 1996 Gran Move?
It’s mounted at the evaporator inlet inside or adjacent to the HVAC case, typically accessed from behind the dash area. The sensing bulb is fixed to the evaporator outlet tube and should be re‑insulated after service for accurate temperature control.

Does the same TX‑valve suit both 1.3 and 1.5 engines?
Catalogues generally list the same style TX‑valve across Gran Move engine options for 1996, as the A/C layout is shared. Always match by VIN or evaporator part number in the EPC to confirm port size and orientation before ordering.

When should the TX‑valve be replaced?
It’s commonly replaced when the system shows erratic cooling with correct refrigerant charge and no airflow faults, when debris or moisture contamination is suspected, or whenever the system is opened for major work such as compressor replacement. Pairing it with a new receiver‑drier is recommended.