Diagnosis Strategies

Air Conditioning Cycle Diagnosis

Condition/Possible Cause:

For the execution of the charging and discharging operation in the table, refer to Recovery, Recycling, Evacuating and Charging.

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).
Refer to the table on the refrigerant pressure-temperature relationship.

Condition / Possible Cause Part 1:

Condition / Possible Cause Part 2:

Condition / Possible Cause Part 3:

Connect The Manifold Gauge

Low-pressure hose (LOW) - Suction side

High pressure hose (HI) - Discharge side