Subaru Legacy BN/BS (2015-2019) Service Manual: Procedure

Subaru Legacy BN/BS (2015-2019) Service Manual / Hvac system (heater ventilator and a c) / Refrigerant pressure with manifold gauge set / Procedure

1. CHECK REFRIGERANT GAS PRESSURE

1. Prepare the vehicle.

NOTE:

Check that the ambient temperature is 25 — 40°C (77 — 104°F) and that the humidity is 30% — 80%.

• Place the vehicle in the shade and windless condition, and open the front hood.

• Open the front windows and close all doors.

2. Check the refrigerant pressure.

Preparation tool:

Manifold gauge set

(1) Connect the manifold gauge set, and start the engine.

(2) Set the vehicle to the following conditions.

Item	Condition
Engine	Warmed up (Engine coolant temperature indicator light: OFF)
Air vent grille	Shutter is fully open.
AC switch	ON
Temperature adjustment dial	LO (MAX COOL)
FRESH/RECIRC switch	RECIRC
Air flow control switch	VENT
Fan switch (auto A/C model)	5/7 level
Fan dial (manual A/C model)	3/4 level

(3) In the condition of step (2), idle the engine for 30 minutes.

(4) Read the gauge values on both high pressure side and low pressure side for manifold gauge.

3. Measure the air vent grille outlet opening temperature, ambient temperature and humidity.

Preparation tool:

Thermometer and hygrometer

NOTE:

For outlet opening temperature, measure the average temperature of center grille assembly and side grille assembly.

4. Check that the high and low pressures and outlet opening temperature for ambient temperature and humidity is within the standard value described in the chart below.

5. Refer to “DIAGNOSIS WITH SYMPTOM” if the inspection result is not within the standard value. Refrigerant Pressure with Manifold Gauge Set > INSPECTION

Refrigerant pressure with manifold gauge set

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Inspection

1. INSPECTION WITH PRESSURE SYMPTOMSymptomsReferenceBoth high and low pressure sides are low Refrigerant Pressure with Manifold Gauge Set > INSPECTIONBoth high and low pressure sides are high Refriger ...

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