Subaru Outback manuals

Subaru Outback: Air Conditioning System

A: WIRING DIAGRAM

Refer to "Air Conditioning System" in the wiring diagram. <Ref. to WI-53, WIRING DIAGRAM, Air Conditioning System.>

B: ELECTRICAL SPECIFICATION

Refer to "Auto A/C Control Module I/O Signal" of "HVAC SYSTEM (DIAGNOSTICS)" section. <Ref. to AC(diag)- 6, ELECTRICAL SPECIFICATION, Control Module I/O Signal.>

C: INSPECTION

Refer to "Basic Diagnostic Procedure" of "HVAC SYSTEM (DIAGNOSTICS)" section. <Ref. to AC(diag)-2, Basic Diagnostic Procedure.>

D: NOTE

For procedure of each component in the air conditioning system, refer to the respective section.

Refrigerant Pressure with Manifold Gauge Set

A: PROCEDURE

1. CHECK REFRIGERANT GAS PRESSURE

Preparation tool:
Manifold gauge set
Thermometer

1) Prepare the vehicle.

NOTE: Check that the ambient temperature is 25 - 40ºC (77 - 104ºF) and that the humidity is 30% - 80%.

2) Connect the manifold gauge set, and then check the refrigerant pressure.

  1. Connect the manifold gauge set, and start the engine.
  2. Set the vehicle to the following conditions.

Subaru Outback. HVAC System (Heater, Ventilator and A/C)

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

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.

Subaru Outback. HVAC System (Heater, Ventilator and A/C)

5) Refer to "DIAGNOSIS WITH SYMPTOM" if the inspection result is not within the standard value. <Ref. to AC-21, INSPECTION WITH PRESSURE SYMPTOM, INSPECTION, Refrigerant Pressure with Manifold Gauge Set.>

B: INSPECTION

1. INSPECTION WITH PRESSURE SYMPTOM

Subaru Outback. HVAC System (Heater, Ventilator and A/C)

2. BOTH HIGH AND LOW PRESSURE SIDES ARE LOW

Subaru Outback. HVAC System (Heater, Ventilator and A/C)

3. BOTH HIGH AND LOW PRESSURE SIDES ARE HIGH

Subaru Outback. HVAC System (Heater, Ventilator and A/C)

4. HIGH AND LOW PRESSURE SIDES ARE EQUAL, OR HIGH-PRESSURE SIDE IS LOW

Subaru Outback. HVAC System (Heater, Ventilator and A/C)

5. HIGH-PRESSURE SIDE IS HIGH

Subaru Outback. HVAC System (Heater, Ventilator and A/C)

6. LOW-PRESSURE SIDE IS LOW

Subaru Outback. HVAC System (Heater, Ventilator and A/C)

7. LOW-PRESSURE SIDE IS HIGH

Subaru Outback. HVAC System (Heater, Ventilator and A/C)

Refrigerant Recovery Procedure

A: PROCEDURE

Preparation tool:
Manifold gauge set
Refrigerant recovery system

CAUTION:

Subaru Outback. HVAC System (Heater, Ventilator and A/C)

  1. Manifold gauge
  2. Low pressure valve
  3. Center valve
  4. High pressure valve
  5. Low-pressure hose
  6. Center manifold hose (vacuum pump and refill)
  7. High-pressure hose
  8. Low-pressure side service port
  9. High-pressure side service port

1) Perform compressor oil return operation. <Ref. to AC-31, PROCEDURE, Compressor Oil.>

2) Stop the engine.

3) Attach the manifold gauge set.

  1. Check that all valves are fully closed.
  2. Install the low/high pressure hoses to the service ports on the low/high pressure sides of the vehicle respectively.

CAUTION: Confirm that the connections are secure.

  1. Connect the center hose to the refrigerant recovery system.

4) Follow the operation manual attached to the refrigerant recovery system to collect the refrigerant.

Refrigerant Charging Procedure

A: PROCEDURE

Preparation tool:
Manifold gauge set
Vacuum pump
Can tap
Weight scale

CAUTION:

Subaru Outback. HVAC System (Heater, Ventilator and A/C)

  1. Manifold gauge
  2. Low pressure valve
  3. Center valve
  4. High pressure valve
  5. Low-pressure hose
  6. Center manifold hose (vacuum pump and refill)
  7. High-pressure hose
  8. Low-pressure side service port
  9. High-pressure side service port

1) Attach the manifold gauge set.

  1. Check that all valves are fully closed.
  2. Install the low/high pressure hoses to the service ports on the low/high pressure sides of the vehicle respectively.

CAUTION: Confirm that the connections are secure.

  1. Connect the center manifold hose of the manifold gauge to the vacuum pump.

2) Perform evacuation.

CAUTION:

Make sure to perform evacuation using a vacuum pump.

  1. Open the low-pressure valve, high-pressure valve and center valve.
  2. Operate the vacuum pump.
  3. Perform evacuation for 5 minutes or more, and when the low pressure gauge needle reaches -0.1 MPa (1.0 kgf/cm2, 14 psi), close the center manifold hose valve, and stop the vacuum pump.
  4. Leave alone for 5 to 10 minutes after closing the low pressure side and high pressure side valves, and check whether there is any change in the low pressure gauge needle indication. If the needle position changes, this indicates a leak. Check the pipe and hose connections, and repair the location with the problem. In this case, repeat again from step 1).
  5. If there is no leakage, continue evacuation for additional 20 - 30 minutes, close all valves and then stop the vacuum pump.

3) Charge refrigerant.

  1. Follow the can tap operation manual, install to the refrigerant can.
  2. Disconnect the center manifold hose from the vacuum pump, and connect the hose to the tap valve.

NOTE: When a 13.6 kg (30 lb) refrigerant container (1) is used, measure the amount of refrigerant with a refrigerant charging scale (2), and connect with the center manifold hose.

Subaru Outback. HVAC System (Heater, Ventilator and A/C)

  1. Open the tap valve of HFC-134a supply container (refrigerant can or refrigerant container).
  2. Loosen the center manifold hose connection on the manifold gauge for a few seconds (if there is a purge valve on the manifold gauge, push this instead) to allow the air in the center manifold hose to be bled by the refrigerant pressure.
  3. Open the low-pressure side and high-pressure side valves of the manifold gauge to fill with refrigerant.

NOTE: If the HFC-134a supply container is empty, close all valves of manifold gauge and tap valve of HFC-134a supply container, and replace the empty container. After replacing with a new HFC-134a supply container, perform air purge, and resume the filling operation.

  1. If the low pressure gauge indicates approximately 0.2 MPa (2.0 kgf/cm2, 29 psi) or refrigerant filling efficiency drops, close the low-pressure side valve and high-pressure side valve.
  2. Check that the low-pressure side valve and high-pressure side valve are closed, turn off the A/C switch and start the engine.

CAUTION: When filling with the engine running, do not open the high pressure side valve. Always fill from the low pressure side.

  1. To prevent damage to the compressor, push the A/C switch ON-OFF quickly a few times.
  2. Set the vehicle to the following conditions.

Subaru Outback. HVAC System (Heater, Ventilator and A/C)

  1. Open the low-pressure side valve, check the refrigerant pressure with a manifold gauge and fill with refrigerant up to the specified amount. <Ref. to AC-21, INSPECTION WITH PRESSURE SYMPTOM, INSPECTION, Refrigerant Pressure with Manifold Gauge Set.>

4) Using an electronic leak detector (leak tester), check for refrigerant leaks in the system. <Ref. to AC-28, INSPECTION, Refrigerant Leak Check.>

5) After filling with refrigerant, close all valves and remove the manifold gauge set.

6) Attach cap to the service port of the low-pressure side and high-pressure side.

Refrigerant Leak Check

A: INSPECTION

Preparation tool:
Manifold gauge set
Electronic leak detector (leak tester)

1) Attach the manifold gauge set.

  1. Check that all valves are fully closed.
  2. Install the low/high pressure hoses to the service ports on the low/high pressure sides of the vehicle respectively.

CAUTION: Confirm that the connections are secure.

  1. Start the engine, operate the A/C system for approx. 10 minutes, and check that the high-pressure side indicates 0.69 MPa (7.0 kgf/cm2, 100 psi) or more.

2) Stop the engine to start the leak test.

Subaru Outback. HVAC System (Heater, Ventilator and A/C)

Subaru Outback. HVAC System (Heater, Ventilator and A/C)

READ NEXT:

 Relay and Fuse

A: LOCATION NOTE: For other related fuses, refer to the wiring diagram. <Ref. to WI-15, Power Supply Circuit.> B: INSPECTION 1. CHECK FUSE. 1) Remove the fuse and inspect visually. 2) If the

 Heater Core

A: REMOVAL 1) Disconnect the ground cable from battery. 2) Using the refrigerant recovery system, discharge refrigerant. <Ref. to AC-24, PROCEDURE, Refrigerant Recovery Procedure.> 3) Drain t

 Control Panel

A: REMOVAL 1. AUTO A/C MODEL 1) Disconnect the ground cable from battery. 2) Remove the center panel assembly. CAUTION: Do not put your finger on the fin of the air vent grille. Doing so may damage

SEE MORE:

 Remote engine start system (dealer option)

WARNING ● Do not remote start a vehicle in an enclosed environment (e.g. closed garage). Prolonged operation of a motor vehicle in an enclosed environment can cause a harmful build-up of Carbon Monoxide. Carbon Monoxide is harmful to your health. Exposure to high levels of Carbon Monoxi

 Precautions against vehicle modification

WARNING To avoid accidental activation of the system or rendering the system inoperative, which may result in serious injury, no modifications should be made to any components or wiring of the SRS airbag system. This includes the following modifications. ● Installation of custom steerin

© 2010-2022 Copyright www.suoutback.com