Air Conditioning System

Air Conditioning Cycle Diagnosis

Checking The Refrigerant System With Manifold Gauge
Since Refrigerant-134a (HFC-134a) is used in the air conditioning system in this vehicle, be sure to use manifold gauges, charging hoses and other air conditioning service tools for HFC-134a when checking the refrigerant system.

Conditions:
- Run the engine at Idling
- Air conditioning switch is ON
- Run the blower motor at HIGH position
- Temperature control lever set to MAX COLD
- Air source selector lever at CIRC
- Open the engine hood
- Close all the doors

Normal Pressure:
- At ambient temperature: approx. 25-30 °C (77 - 86 °F).
- At low-pressure side: approx. 147.1 - 294.2 kPa (21.3 - 42.7 psi).
- At high-pressure side: approx. 1372.9 - 1863.3 kPa (199.1 - 270.2 psi).
See the table on the refrigerant pressure-temperature relationship.




HFC-1 34a Pressure-Temperature Relationship

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Connect The Manifold Gauge
Low-pressure hose (LOW) - Suction side
High pressure hose (HI) - Discharge side