Mazda CX-9 Grand Touring. Manual — part 434

Fig. 2: Identifying Manifold Gauge Set Installation
Courtesy of MAZDA MOTORS CORP.

REFRIGERANT CHARGING

CHARGING RECYCLED R-134A REFRIGERANT

1. Connect an R-134a recovery/recycling/recharging device to the vehicle and follow the device

manufacturer's instructions.

CHARGING PREPARATION

1. Install the manifold gauge set.

2. Connect the tap pin side of the charging hose to the air purge valve of the manifold gauge.

3. Connect the vacuum pump hose to the center joint of the manifold gauge.

4. Connect the vacuum pump hose to the vacuum pump.

5. Connect the charging hose to the refrigerant tank.

6. Place the refrigerant tank on the scale.

Regular amount of refrigerant (approx. quantity)

660-710 g {23.3-25.0 oz}

CAUTION:



Do not exceed the specification when charging the system with
refrigerant. Doing so will decrease the efficiency of the air
conditioner or damage the refrigeration cycle parts.

2008 Mazda CX-9 Grand Touring

2008 HVAC Refrigerant System - Mazda CX-9

Microsoft

Sunday, November 15, 2009 10:13:14 AM

Page 3

© 2005 Mitchell Repair Information Company, LLC.

Fig. 3: Identifying Charging Preparation
Courtesy of MAZDA MOTORS CORP.

EVACUATION

1. Open all the valves of the manifold gauge.

2. Start the vacuum pump and let it operate for 15 min.

Fig. 4: Starting Vacuum Pump
Courtesy of MAZDA MOTORS CORP.

3. Verify that high-and low-pressure side readings of the manifold gauge are at - 101 kPa {-760 mmHg, -

29.9 inHg}. Close each valve of the manifold gauge.

CAUTION:



Close the manifold gauge valve immediately after stopping the
vacuum pump. If the valve is left open, the vacuum pump oil will
flow back into the refrigeration cycle and cause a decrease in
the efficiency of the air conditioner.

2008 Mazda CX-9 Grand Touring

2008 HVAC Refrigerant System - Mazda CX-9

Microsoft

Sunday, November 15, 2009 10:13:14 AM

Page 4

© 2005 Mitchell Repair Information Company, LLC.

Fig. 5: Inspecting High And Low-Pressure Side Readings Of Manifold Gauge
Courtesy of MAZDA MOTORS CORP.

AIRTIGHTNESS CHECK

1. Stop the vacuum pump and wait for 5 min.

2. Check the high-and low-pressure side readings of the manifold gauge.



If the reading has changed, inspect for leakage and go to Evacuation. (See EVACUATION.)



If the reading has not changed, go to Charging New R-134a Refrigerant. (See CHARGING NEW
R-134A REFRIGERANT.)

CHARGING NEW R-134A REFRIGERANT

1. Open the valve of the refrigerant tank.

2. Weigh the refrigerant tank to charge the suitable amount of refrigerant.

WARNING:



If the refrigerant system is charged with a large amount of
refrigerant when inspecting for gas leakage, and if any leakage
should occur, the refrigerant will be released into the
atmosphere. In order to prevent the accidental release of
refrigerant which can destroy the ozone layer in the
stratosphere, follow the proper procedures and charge with
only a small amount of refrigerant when inspecting for gas
leakage.



If charging the system with refrigerant using service cans,
running the engine with the high-pressure side valve open is
dangerous. Pressure within the service cans will increase and
the cans could explode, scattering metal fragments and liquid
refrigerant that can seriously injure you. Therefore, do not open
the high-pressure side valve while the engine is running.

CAUTION:



Always being charging of refrigerant from the high-pressure
side. If changing is begun from the low-pressure side, the vanes
of the A/C compressor will not be released and abnormal noise

2008 Mazda CX-9 Grand Touring

2008 HVAC Refrigerant System - Mazda CX-9

Microsoft

Sunday, November 15, 2009 10:13:14 AM

Page 5

© 2005 Mitchell Repair Information Company, LLC.

3. Open the high-pressure side valve of the manifold gauge.

Fig. 6: Opening High-Pressure Side Valve Of Manifold Gauge
Courtesy of MAZDA MOTORS CORP.

4. When the low-pressure side reading increases to 0.098 MPa {1.0 kgf/cm

2

, 14 psi}, close the high-

pressure side valve of the manifold gauge.

5. Inspect for leakage from the cooler pipe/hose connections using a gas leak tester.



If there is no leakage, go to Step 7.



If leakage is found at a loose joint, tighten the joint, then go to the next step.

6. Inspect for leakage again.



If there is no leakage after tightening the joint, go to the next step.



If there is still a leakage at the same joint, discharge the refrigerant and then repair the joint. Repeat
the charging procedure from evacuation.

Fig. 7: Closing High-Pressure Side Valve Of Manifold Gauge
Courtesy of MAZDA MOTORS CORP.

may result.

WARNING:



If charging the system with refrigerant using service cans,
running the engine with the high-pressure side valve open is
dangerous. Pressure within the service cans will increase and

2008 Mazda CX-9 Grand Touring

2008 HVAC Refrigerant System - Mazda CX-9

Microsoft

Sunday, November 15, 2009 10:13:14 AM

Page 6

© 2005 Mitchell Repair Information Company, LLC.